Mounted LEDs

Overview
Specs
Relative Power
Stability
Pin Diagram
LED Drivers
Collimation
Multi-LED Source
Ray Data
Use with Cerna
Feedback
LED Selection Guide

Legend
LED Mounted to Ø57.0 mm Housing	LED Mounted to Ø30.5 mm Housing

Item #	Color (Click for Spectrum)^a	Nominal Wavelength^a,b	Minimum LED Power Output^a
M265L3^c	Deep UV	265 nm	10 mW
M275L4^c	Deep UV	275 nm	45 mW
M285L5^c	Deep UV	285 nm	50 mW
M300L4^c	Deep UV	300 nm	26 mW
M340L4^c	Deep UV	340 nm	53 mW
M365L2^c	UV	365 nm	190 mW
M365LP1^c	UV	365 nm	1150 mW
M375L4^c	UV	375 nm	1270 mW
M385L2^c	UV	385 nm	270 mW
M385LP1^c	UV	385 nm	1650 mW
M395L4^c	UV	395 nm	400 mW
M405L4^c	UV	405 nm	1000 mW
M405LP1^c	UV	405 nm	1500 mW
M415L4^c	Violet	415 nm	1310 mW
M415LP1^c	Violet	415 nm	1640 mW
M430L4^c	Violet	430 nm	490 mW
M450LP1	Royal Blue	450 nm	1850 mW
M455L3^d	Royal Blue	455 nm	900 mW
M470L3^d	Blue	470 nm	650 mW
M490L4	Blue	490 nm	205 mW
M505L3^d	Cyan	505 nm	400 mW
M530L3^d	Green	530 nm	350 mW
MINTL5	Mint	554 nm	650 mW
M565L3^e	Lime	565 nm	880 mW
M590L3^d	Amber	590 nm	160 mW
M595L3^e	Amber	595 nm	445 mW
M617L3^d	Orange	617 nm	600 mW
M625L4	Red	625 nm	700 mW
M660L4	Deep Red	660 nm	940 mW
M680L4	Deep Red	680 nm	180 mW
M700L4	Deep Red	700 nm	80 mW
M730L4^d	Far Red	730 nm	515 mW
M780L3	IR	780 nm	200 mW
M780LP1	IR	780 nm	800 mW
M810L3	IR	810 nm	325 mW
M850L3	IR	850 nm	900 mW
M850LP1	IR	850 nm	1400 mW
M880L3	IR	880 nm	300 mW
M940L3	IR	940 nm	800 mW
M970L4	IR	970 nm	600 mW
M1050L2	IR	1050 nm	50 mW
M1050L4	IR	1050 nm	160 mW
M1200L3	IR	1200 nm	30 mW
M1300L3	IR	1300 nm	25 mW
M1450L3	IR	1450 nm	31 mW
M1550L3	IR	1550 nm	31 mW
M1650L4	IR	1650 nm	13 mW
MPRP1L4^e	Purple	455 nm (12.5%^f) / 640 nm	275 mW
MBB1L3^g	Broadband	470 - 850 nm^h	70 mW
MWWHL4^e	Warm White	3000 Kⁱ	570 mW
MWWHLP1^e	Warm White	3000 Kⁱ	2000 mW
MNWHL4^e	Neutral White	4900 Kⁱ	740 mW
MCWHL5^d,e	Cold White	6500 Kⁱ	800 mW
MCWHLP1^e	Cold White	6500 Kⁱ	2350 mW

Due to variations in the manufacturing process and operating parameters such as temperature and current, the actual spectral output of any given LED will vary. Output plots and nominal wavelength specs are only intended to be used as a guideline.
For LEDs in the visible spectrum, the nominal wavelength indicates the wavelength at which the LED appears brightest to the human eye. The nominal wavelength for visible LEDs may not correspond to the peak wavelength as measured by a spectrometer.
Our 265 nm to 430 nm LEDs radiate intense UV light during operation. Precautions must be taken to prevent looking directly at the UV light and UV light protective glasses must be worn to avoid eye damage. Exposure of the skin and other body parts to the UV light should be avoided.
These LEDs use a high-thermal-conductivity MCPCB material from SinkPAD, while the rest of the mounted LEDs use a high-thermal-conductivity MCPCB material from Bergquist.
These LEDs are phosphor-converted and may not turn off completely when modulated above 10 kHz at duty cycles below 50%.
Percentage of LED intensity that emits in the blue portion of the spectrum, from 400 nm to 525 nm. See spectrum graph for details.
The MBB1L3 LED may not turn off completely when modulated at frequencies above 1 kHz with a duty cycle of 50%, as the broadband emission is produced by optically stimulating emission from phosphor. For modulation at frequencies above 1 kHz, the duty cycle may be reduced. For example, 10 kHz modulation is attainable with a duty cycle of 5%.
10 dB Bandwidth
Correlated Color Temperature

Mounted LED Features

Nominal Wavelengths Ranging from 265 nm to 1650 nm
White, Broadband, and Dual-Peak LEDs Also Available
Integrated EEPROM Stores LED Operating Parameters
Thermal Properties Optimized for Stable Output Power
Internal SM1 (1.035"-40) Threading (6 mm Deep) for Attaching Collimation Adapters or Ø1" Lens Tubes
Collimation Adapters Available
- Adjustable Collimation Adapters for Ø2" Optics
- Microscope Adapters for Select Leica, Nikon, Olympus, or Zeiss Microscopes
Mounted LEDs with Fixed-Focus Collimation Adapters for Microscopes Available
4-Pin Female Mating Connector for Custom Power Supplies can be Purchased Separately

Each uncollimated, mounted LED consists of a single LED that has been mounted to the end of a heat sink. Most of the LEDs on this page have a heat sink housing that has the same 1.20" external diameter as an SM1 lens tube. Some of the LEDs offered below generate more heat during operation, and so are mounted to a larger heat sink with a Ø57.0 mm plastic housing for increased heat dissipation and thermal stability (indicated by the green rows in the table to the right). All the heat sinks are equipped with 6 mm deep internal SM1 (1.035"-40) threads for easy integration with other Thorlabs components. The larger heat sinks are also equipped with four 4-40 tapped holes for compatibility with 30 mm cage systems.

The integrated EEPROM chip in each LED stores information about the LED (e.g., current limit, wavelength, and forward voltage) and can be read by Thorlabs' DC2200 and DC4100 LED Controllers. For more information about LED drivers, including the basic LEDD1B driver, see the LED Drivers tab.

The spectrum of each LED and associated data file can be viewed by clicking on the links in the table to the right. Multiple windows can be opened simultaneously in order to compare LEDs.

Optimized Thermal Management
These mounted LEDs possess good thermal stability properties, eliminating the issue of degradation of optical output power due to increased LED temperature. For more details, please see the Stability tab.

White Light, Dual-Peak, and Broadband LEDs
Our warm, neutral, and cold white LEDs feature broad spectra that span several hundred nanometers. The difference in appearance amongst these three LEDs can be described using the correlated color temperature, which indicates that the LEDs color appearance is similar to a black body radiator at that temperature. In general, warm white LEDs offer a spectrum similar to a tungsten source, while cold white LEDs have a stronger blue component to the spectrum; neutral white LEDs provide a more even illumination spectrum over the visible range than warm white or cold white LEDs. Cold white LEDs are more suited for fluorescence microscopy applications or cameras with white balancing, because of a higher intensity at most wavelengths compared to warm white LEDs. Neutral white LEDs are ideal for horticultural applications.

For horticultural applications requiring illumination in both red and blue portions of the spectrum, Thorlabs offers the MPRP1L4. This purple LED features dual peaks at 455 nm and 640 nm, respectively, to stimulate photosynthesis (see graph to compare the absorption peaks of photosynthesis pigments with the LED spectrum). The LED was designed to maintain the red/blue ratio of the emission spectrum over its lifetime to provide high uniformity of plant growth.

The MBB1L3 mounted broadband LED has been designed to have relatively flat spectral emission over a wide wavelength range. Its FWHM bandwidth ranges from 500 nm to 780 nm, while the 10 dB bandwidth ranges between 470 nm and 850 nm. For more information on the spectrum of this broadband source, please see the table to the right.

Collimation Adapters
Collimation adapters are available that incorporate an AR-coated aspheric lens for either 350 - 700 nm or 650 - 1050 nm in housings that are compatible with both LED housing styles (Ø57.0 mm or Ø30.5 mm housing).

Our adjustable collimation adapters can translate a Ø2" (50 mm) lens by up to 20 mm. A translating carriage, which can be locked using a 2 mm (5/64") hex key or balldriver, is used to provide collimation adjustment. Each adjustable collimation adapter includes an internal SM2 (2.035"-40) thread adapter so that the LEDs can be easily integrated with Thorlabs' SM2-threaded components, such as our microscope port adapters. These adapters are offered in versions with and without an optic.

We also offer fixed collimation adapters that mate to the epi-illumination ports on select Leica DMI, Nikon Eclipse Ti, Olympus IX/BX, or Zeiss Axioskop microscopes. See below for more details. Thorlabs also offers mounted LEDs with pre-attached microscope collimation adapters.

Multi-LED Source
A customizable multi-LED source may be constructed using our mounted LEDs and other Thorlabs items. This source may be configured for integration with Thorlabs' versatile SM1 Lens Tube Systems, 30 mm Cage Systems, and the microscope adapters sold below. Please see the Multi-LED Source tab for a detailed item list and instructions.

Thorlabs also offers integrated, user-configurable 4-Wavelength High-Power LED Sources.

Driver Options
Thorlabs offers four LED drivers: LEDD1B, DC2200, DC4100, and DC4104 (the latter two require the DC4100-HUB). See the LED Drivers tab for compatibility and driver features. The LEDD1B is capable of providing LED modulation frequencies up to 5 kHz, while DC4100 and DC4104 can modulate the LED at a rate up to 100 kHz. The DC2200 can provide modulation at up to 250 kHz if driven by an external source. In addition, the DC2200, DC4100, and DC4104 drivers are capable of reading the current limit from the EEPROM chip of the connected LED and automatically adjusting the maximum current setting to protect the LED. Please note that the DC4100 and DC4104 can only be used to drive LEDs requiring a forward voltage of 5 V or less.

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LED Mounted to Ø57.0 mm Housing	LED Mounted to Ø30.5 mm Housing

Item #	Color (Click for Spectrum)^a	Nominal Wavelength^a,b	LED Output Power^a		Maximum Current (CW)	Forward Voltage	Bandwidth (FWHM)	Irradiance (Typical)^c	Electrical Power	Viewing Angle (Full Angle at Half Max)	Emitter Size	Typical Lifetime^d
Item #	Color (Click for Spectrum)^a	Nominal Wavelength^a,b	Minimum	Typical	Maximum Current (CW)	Forward Voltage	Bandwidth (FWHM)	Irradiance (Typical)^c	Electrical Power	Viewing Angle (Full Angle at Half Max)	Emitter Size	Typical Lifetime^d
M265L3^e	Deep UV	265 nm	10 mW	12 mW	350 mA	6.8 V	11 nm	-	2.380 W	130°	1 mm x 1 mm	>1 000 h
M275L4^e	Deep UV	275 nm	45 mW	80 mW	700 mA	7.3 V	11 nm	0.8 µW/mm²	5.100 W	118°	2 mm x 2 mm	>1 000 h
M285L5^e	Deep UV	285 nm	50 mW	70 mW	500 mA	5.9 V	13 nm	0.7 µW/mm²	2.950 W	120°	1 mm x 1 mm	>10 000 h
M300L4^e	Deep UV	300 nm	26 mW	32 mW	350 mA	8.0 V	20 nm	0.3 µW/mm²	2.800 W	130°	1 mm x 1 mm	>10 000 h
M340L4^e	Deep UV	340 nm	53 mW	60 mW	700 mA	4.6 V	11 nm	2.22 µW/mm²	3.220 W	110°	1 mm x 1 mm	>3 000 h
M365L2^e	UV	365 nm	190 mW	360 mW	700 mA	4.4 V	7.5 nm	8.9 µW/mm²	3.080 W	120°	1 mm x 1 mm	>10 000 h
M365LP1^e	UV	365 nm	1150 mW	1400 mW	1700 mA	4.0 V	9 nm	17.6 µW/mm²	6.800 W	120°	1.4 mm x 1.4 mm	>10 000 h
M375L4^e	UV	375 nm	1270 mW	1540 mW	1400 mA	3.6 V	9 nm	19.2 µW/mm²	4.760 W	130°	1 mm x 1 mm	>10 000 h
M385L2^e	UV	385 nm	270 mW	430 mW	700 mA	4.3 V	10 nm	11.8 µW/mm²	3.010 W	120°	1 mm x 1 mm	>10 000 h
M385LP1^e	UV	385 nm	1650 mW	1830 mW	1700 mA	3.9 V	12 nm	23.3 µW/mm²	6.630 W	120°	1.4 mm x 1.4 mm	>10 000 h
M395L4^e	UV	395 nm	400 mW	535 mW	500 mA	4.5 V	16 nm	6.7 µW/mm²	2.250 W	126°	1 mm x 1 mm	>10 000 h
M405L4^e	UV	405 nm	1000 mW	1300 mW	1000 mA	3.4 V	12.5 nm	14.53 µW/mm²	3400 mW	140°	1.4 mm x 1.4 mm	>1 000 h
M405LP1^e	UV	405 nm	1500 mW	1700 mW	1400 mA	3.45 V	12 nm	24.6 µW/mm²	4.830 W	120°	1.4 mm x 1.4 mm	>10 000 h
M415L4^e	Violet	415 nm	1310 mW	1550 mW	1500 mA	3.1 V	14 nm	15.6 µW/mm²	4.650 W	138°	1.4 mm x 1.4 mm	>10 000 h
M415LP1^e	Violet	415 nm	1640 mW	1940 mW	2000 mA	3.15 V	14 nm	19.5 µW/mm²	6.300 W	138°	1.4 mm x 1.4 mm	>10 000 h
M430L4^e	Violet	430 nm	490 mW	600 mW	500 mA	3.8 V	15 nm	35.3 µW/mm²	1.900 W	22°	1 mm x 1 mm	>10 000 h
M450LP1	Royal Blue	450 nm	1850 mW	2100 mW	2000 mA	3.5 V	18 nm	35.6 µW/mm²	7.000 W	120°	1.5 mm x 1.5 mm	1 000 h
M455L3^f	Royal Blue	455 nm	900 mW	1020 mW	1000 mA	3.2 V	18 nm	31.2 µW/mm²	3.200 W	80°	1 mm x 1 mm	100 000 h
M470L3^f	Blue	470 nm	650 mW	710 mW	1000 mA	3.2 V	25 nm	21.9 µW/mm²	3.200 W	80°	1 mm x 1 mm	100 000 h
M490L4	Blue	490 nm	205 mW	240 mW	350 mA	3.8 V	26 nm	2.5 µW/mm²	1.330 W	128°	1 mm x 1 mm	>10 000 h
M505L3^f	Cyan	505 nm	400 mW	440 mW	1000 mA	3.3 V	30 nm	11.1 µW/mm²	3.300 W	80°	1 mm x 1 mm	100 000 h
M530L3^f	Green	530 nm	350 mW	370 mW	1000 mA	3.2 V	33 nm	9.5 µW/mm²	3.200 W	80°	1 mm x 1 mm	100 000 h
MINTL5	Mint	554 nm	650 mW	815 mW	1225 mA	3.5 V	-	12.4 µW/mm²	4.300 W	120°	1 mm x 1 mm	>10 000 h
M565L3^g	Lime	565 nm	880 mW	979 mW	1000 mA	3.1 V	104 nm	11.7 µW/mm²	3.100 W	125°	1 mm x 1 mm	50 000 h
M590L3^f	Amber	590 nm	160 mW	170 mW	1000 mA	2.2 V	18 nm	5.3 µW/mm²	2.200 W	80°	1 mm x 1 mm	100 000 h
M595L3^g	Amber	595 nm	445 mW	502 mW	700 mA	3.05 V	80 nm	6.9 µW/mm²	2.135 W	125°	1 mm x 1 mm	50 000 h
M617L3^f	Orange	617 nm	600 mW	650 mW	1000 mA	2.2 V	18 nm	15.7 µW/mm²	2.200 W	80°	1 mm x 1 mm	100 000 h
M625L4	Red	625 nm	700 mW	920 mW	1000 mA	2.5 V	17 nm	21.9 µW/mm²	2.500 W	80°	1 mm x 1 mm	>100 000 h
M660L4	Deep Red	660 nm	940 mW	1050 mW	1200 mA	2.6 V	20 nm	20.88 µW/mm²	3.120 W	120°	1.5 mm x 1.5 mm	>10 000 h
M680L4	Deep Red	680 nm	180 mW	210 mW	600 mA	2.5 V	22 nm	14.5 µW/mm²	1.500 W	18°	1 mm x 1 mm	>10 000 h
M700L4	Deep Red	700 nm	80 mW	125 mW	500 mA	2.7 V	20 nm	1.0 µW/mm²	1.350 W	128°	1 mm x 1 mm	>10 000 h
Item #	Color (Click for Spectrum)^a	Nominal Wavelength^a,b	LED Output Power^a		Maximum Current (CW)	Forward Voltage	Bandwidth (FWHM)	Irradiance (Typical)^c	Electrical Power	Viewing Angle (Full Angle at Half Max)	Emitter Size	Typical Lifetime^d
Item #	Color (Click for Spectrum)^a	Nominal Wavelength^a,b	Minimum	Typical	Maximum Current (CW)	Forward Voltage	Bandwidth (FWHM)	Irradiance (Typical)^c	Electrical Power	Viewing Angle (Full Angle at Half Max)	Emitter Size	Typical Lifetime^d
M730L4^f	Far Red	730 nm	515 mW	595 mW	1000 mA	2.3 V	37 nm	13.2 µW/mm²	2.300 W	80°	1 mm x 1 mm	>10 000 h
M780L3	IR	780 nm	200 mW	300 mW	800 mA	2.0 V	28 nm	47.3 µW/mm²	1.600 W	20°	1 mm x 1 mm	>10 000 h
M780LP1	IR	780 nm	800 mW	950 mW	800 mA	7.8 V	30 nm	13.3 µW/mm²	6.240 W	120°	Ø3 mm (3 Emitters)	>10 000 h
M810L3	IR	810 nm	325 mW	375 mW	500 mA	3.6 V	25 nm	61.8 µW/mm²	1.800 W	20°	1 mm x 1 mm	>10 000 h
M850L3	IR	850 nm	900 mW	1100 mW	1200 mA	2.95 V	30 nm	22.9 µW/mm²	3.540 W	90°	1 mm x 1 mm	100 000 h
M850LP1	IR	850 nm	1400 mW	1600 mW	1500 mA	3.85 V	30 nm	19.4 µW/mm²	5.770 W	150°	1 mm x 1 mm	>10 000 h
M880L3	IR	880 nm	300 mW	350 mW	1000 mA	1.7 V	50 nm	5.6 µW/mm²	1.700 W	132°	1 mm x 1 mm	>10 000 h
M940L3	IR	940 nm	800 mW	1000 mW	1000 mA	2.75 V	37 nm	19.1 µW/mm²	2.750 W	90°	1 mm x 1 mm	100 000 h
M970L4	IR	970 nm	600 mW	720 mW	1000 mA	1.9 V	60 nm	7.4 µW/mm²	1.900 W	130°	1 mm x 1 mm	>10 000 h
M1050L2	IR	1050 nm	50 mW	70 mW	700 mA	1.5 V	60 nm	1.9 µW/mm2	1.050 W	120°	1 mm x 1 mm	>10 000 h
M1050L4	IR	1050 nm	160 mW	210 mW	600 mA	1.4 V	37 nm	3.7 µW/mm²	840 mW	128°	1 mm x 1 mm	>10 000 h
M1200L3	IR	1200 nm	30 mW	35 mW	700 mA	1.4 V	80 nm	0.7 µW/mm²	0.980 W	134°	1 mm x 1 mm	>10 000 h
M1300L3	IR	1300 nm	25 mW	30 mW	500 mA	1.4 V	80 nm	0.6 µW/mm²	0.700 W	134°	1 mm x 1 mm	>10 000 h
M1450L3	IR	1450 nm	31 mW	36 mW	700 mA	1.15 V	80 nm	0.4 µW/mm²	0.805 W	136°	1 mm x 1 mm	>10 000 h
M1550L3	IR	1550 nm	31 mW	36 mW	1000 mA	1.35 V	102 nm	0.5 µW/mm²	1.485 W	136°	1 mm x 1 mm	>10 000 h
M1650L4	IR	1650 nm	13 mW	16 mW	600 mA	1.1 V	120 nm	1.2 µW/mm²	0.660 W	20°	1 mm x 1 mm	>10 000 h
MPRP1L4^g	Purple	455 nm (12.5%^h) / 640 nm	275 mW	325 mW	300 mA	3.1 V	N/A	3.7 µW/mm²	0.930 W	115°	1 mm x 2 mm	>10 000 h
MBB1L3ⁱ	Broadband	470 - 850 nm^j	70 mW	80 mW	500 mA	3.6 V	280 nm	12.5 µW/mm²	1.800 W	120°	1 mm x 1 mm	10 000 h
MWWHL4^g	Warm White	3000 K^k	570 mW	640 mW	1000 mA	3.0 V	N/A	9.4 µW/mm²	3.000 W	120°	1 mm x 1 mm	>50 000 h
MWWHLP1^g	Warm White	3000 K^k	2000 mW	2300 mW	700 mA	11.7 V	N/A	37.0 µW/mm²	8.200 W	125°	3.5 mm x 3.5 mm	>100 000 h
MNWHL4^g	Neutral White	4900 K^k	740 mW	880 mW	1225 mA	2.9 V	N/A	7.7 µW/mm²	3.553 W	150°	1 mm x 1 mm	>10 000 h
MCWHL5^f,g	Cold White	6500 K^k	800 mW	840 mW	1000 mA	3.2 V	N/A	24.8 µW/mm²	3.200 W	80°	1 mm x 1 mm	100 000 h
MCWHLP1^g	Cold White	6500 K^k	2350 mW	2700 mW	700 mA	11.7 V	N/A	41.3 µW/mm²	8.200 W	125°	3.5 mm x 3.5 mm	>100 000 h

Due to variations in the manufacturing process and operating parameters such as temperature and current, the actual spectral output of any given LED will vary. Output plots and nominal wavelength specs are only intended to be used as a guideline.
For LEDs in the visible spectrum, the nominal wavelength indicates the wavelength at which the LED appears brightest to the human eye. The nominal wavelength for visible LEDs may not correspond to the peak wavelength as measured by a spectrograph.
Irradiance is measured at a distance of 200 mm from the LED.
Thorlabs defines the lifetime of our LEDs as B₅₀/L₅₀, meaning that 50% of the LEDs with a given item # will fall below 50% of the initial optical power at the end of the specified lifetime. Please see the Stability tab for more details.
Our 265 nm to 430 nm LEDs radiate intense UV light during operation. Precautions must be taken to prevent looking directly at the UV light and UV light protective glasses must be worn to avoid eye damage. Exposure of the skin and other body parts to the UV light should be avoided.
These LEDs use a high-thermal-conductivity MCPCB material from SinkPAD, while the rest of the mounted LEDs use a high-thermal-conductivity MCPCB material from Bergquist.
These LEDs are phosphor-converted and may not turn off completely when modulated above 10 kHz at duty cycles below 50%.
Percentage of LED intensity that emits in the blue portion of the spectrum, from 400 nm to 525 nm. See spectrum graph for details.
The MBB1L3 LED may not turn off completely when modulated at frequencies above 1 kHz with a duty cycle of 50%, as the broadband emission is produced by optically stimulating emission from phosphor. For modulation at frequencies above 1 kHz, the duty cycle may be reduced. For example, 10 kHz modulation is attainable with a duty cycle of 5%.
10 dB Bandwidth
Correlated Color Temperature

Relative Power

The actual spectral output and total output power of any given LED will vary due to variations in the manufacturing process and operating parameters, such as temperature and current. Both a typical and minimum output power are specified to help you select an LED that suits your needs. Each mounted LED will provide at least the minimum specified output power at the maximum current. In order to provide a point of comparison for the relative powers of LEDs with different nominal wavelengths, the spectra in the plots below have been scaled to the minimum output power for each LED. This data is representative, not absolute. An excel file with normalized and scaled spectra for all of the mounted LEDs can be downloaded here.

Click to Enlarge
Our 340 nm mounted LED has a typical lifetime of >3,000 hours. In this case, the unit under test continued to provide more than 90% of its initial power after 45 days.

LED Lifetime and Long-Term Power Stability

One characteristic of LEDs is that they naturally exhibit power degradation with time. Often this power degradation is slow, but there are also instances where large, rapid drops in power, or even complete LED failure, occur. LED lifetimes are defined as the time it takes a specified percentage of a type of LED to fall below some power level. The parameters for the lifetime measurement can be written using the notation B_XX/L_YY, where XX is the percentage of that type of LED that will provide less than YY percent of the specified output power after the lifetime has elapsed. Thorlabs defines the lifetime of our LEDs as B₅₀/L₅₀, meaning that 50% of the LEDs with a given Item # will fall below 50% of the initial optical power at the end of the specified lifetime. For example, if a batch of 100 LEDs is rated for 150 mW of output power, 50 of these LEDs can be expected to produce an output power of ≤75 mW after the specified LED lifetime has elapsed.

Click to Enlarge

The sample plot to the right shows example data from long-term stability testing over a 45 day period for a 340 nm mounted LED, which had a lifetime of >3,000 hours (~125 days). The small power drop experienced by the LED after it is turned on is typical behavior during the first few minutes of operation. It corresponds to the period of time required for the LED to warm up to the point where it is thermally stable. Please note that this graph represents the performance of a single LED; the performance of individual LEDs will vary within the stated specifcations.

Optimized Thermal Management

The thermal dissipation performance of these mounted LEDs has been optimized for stable power output. The heat sink is directly mounted to the LED mount so as to provide optimal thermal contact. By doing so, the degradation of optical output power that can be attributed to increased LED junction temperature is minimized (see the graph to the left).

Pin	Specification	Color
1	LED Anode	Brown
2	LED Cathode	White
3	EEPROM GND	Black
4	EEPROM IO	Blue

Pin Connection - Male

The diagram to the right shows the male connector of the mounted LED assembly. It is a standard M8 x 1 sensor circular connector. Pins 1 and 2 are the connection to the LED. Pin 3 and 4 are used for the internal EEPROM in these LEDs. If using an LED driver that was not purchased from Thorlabs, be careful that the appropriate connections are made to Pin 1 and Pin 2 and that you do not attempt to drive the LED through the EEPROM pins.

Compatible Drivers	LEDD1B	DC2200^a	DC4100^a,b,c,	DC4104^a,b,c
Click Photos to Enlarge
LED Driver Current Output (Max)	1.2 A	LED1 Terminal: 10.0 A LED2 Terminal: 2.0 A^d	1.0 A per Channel	1.0 A per Channel
LED Driver Forward Voltage (Max)	12 V	50 V	5 V	5 V
Modulation Frequency Using External Input (Max)	5 kHz	250 kHz^e,f	100 kHz^f (Simultaneous Across all Channels)	100 kHz^f (Independently Controlled Channels)
External Control Interface(s)	Analog (BNC)	USB 2.0 and Analog (BNC)	USB 2.0 and Analog (BNC)	USB 2.0 and Analog (8-Pin)
Main Driver Features	Very Compact Footprint 60 mm x 73 mm x 104 mm (W x H x D)	Touchscreen Interface with Internal and External Options for Pulsed and Modulated LED Operation	4 Channels^b	4 Channels^b
EEPROM Compatible: Reads Out LED Data for LED Settings	-
LCD Display	-

Automatically limits to LED's max current via EEPROM readout.
The DC4100 and DC4104 can power and control up to four LEDs simultaneously when used with the DC4100-HUB. The LEDs on this page all require the DC4100-HUB when used with the DC4100 or DC4104.
These LED drivers have a maximum forward voltage rating of 5 V and can provide a maximum current of 1000 mA. As a result, they cannot be used to drive LEDs which have forward voltage ratings greater than 5 V. LEDs with maximum current ratings higher than 1.0 A can be driven using this driver, but will not reach full power.
The mounted LEDs sold below are compatible with the LED2 Terminal.
Small Signal Bandwidth: Modulation not exceeding 20% of full scale current. The driver accepts other waveforms, but the maximum frequency will be reduced.
Several of these LEDs produce light by stimulating emission from phosphor, which limits their modulation frequencies. The M565L3, M595L3, MPRP1L4, MWWHL4, MNWHL4, and MCWHL5 LEDs may not turn off completely when modulated above 10 kHz at duty cycles below 50%. The MBB1L3 LED may not turn off completely when modulated at frequencies above 1 kHz with a duty cycle of 50%. When the MBB1L3 is modulated at frequencies above 1 kHz, the duty cycle may be reduced; for example, 10 kHz modulation is attainable with a duty cycle of 5%.

Collimating the LED

Thorlabs' extensive catalog of mechanical and optical components provides a variety of configurations that can be used to collimate our mounted LEDs. Some of the applications of the collimated LEDs include custom imaging systems, microscope illuminators, or projectors. Our microscope collimation adapters, available below, feature microscope-compatible outputs and Ø2" aspheric condenser lenses. Adjustable collimation adapters, also available below, have external SM1 threading (1.035"-40) and internal SM2 threading (2.035"-40) for integration with standard Thorlabs components. If your setup requires a collimation package with the smallest possible profile, the LEDs can also be integrated with Ø1" collimating optics and SM1-threaded lens tubes. When exchanging the lens in your collimation adapter, please be careful to follow proper optics handling procedures (Optic Handling Tutorial).

Suggested Items for Adjustable Collimation Adapters
Item #	Qty.	Description
SPW604^a	1	Spanner Wrench for SM2-Threaded Retaining Rings
ACL50832U^b, ACL50832U-A^b, or ACL50832U-B^b	1	Ø2" (Ø50.8 mm) Aspheric Condenser Lens (without Diffuser)

These adapters include a retaining ring that is thicker than our standard retaining ring so that the SPW604 can be used without scratching the highly curved surface of an aspheric condenser lens.
-A and -B refer to the type of AR coating on the lens. Thorlabs' LEDs with a nominal wavelength between 365 nm and 660 nm would require the -A coating, while the LEDs with a nominal wavelength between 730 nm and 1050 nm would require the -B Coating. IR LEDs that emit past 1050 nm can be collimated using an uncoated condenser lens, such as the ACL50832U. Deep UV LEDs with a wavelength ≤340 nm require a lens fabricated from UV Fused Silica, since many standard varieties of glass do not transmit below 350 nm.

Adjustable Collimation Adapter
Thorlabs' adjustable collimation adapters accept an Ø2" (Ø50 mm) collimation optic. Adapter Item #'s with a -A or -B suffix include an aspheric condenser lens coated for 350 - 700 nm or 650 - 1050 nm, respectively. These adapters are also offered without a pre-installed optic so that user-supplied components can be integrated with the LEDs. Several suggestions are presented in the table to the right.

Click to Enlarge
The SM2F Installed on a M365LP1 Mounted LED with ACL50832U-A Condenser Lens

Installing a new lens in the adjustable collimation adapter is a simple procedure:

Turn the adjustment knob to move the optic mounting carriage to the output end of the housing.
Use the SPW604 spanner wrench to remove the retaining ring from the housing.
Place a Ø2" (Ø50 mm) optic of your choice into the mounting carriage with the curved surface facing the output. For customers concerned with the homogeneity of the beam, the AR-coated aspheric condenser lens with diffuser is a good option.
Use the SPW604 spanner wrench to screw the retaining ring into the mounting carriage, securing the optic in place.
Screw the externally SM1-threaded end of the collimation adapter onto an LED of your choice as shown in the picture to the left.

SM1-Threaded Collimation Assembly
For cases where a smaller profile than the adjustable collimation adapter is required, a simple LED collimation assembly can be built from the components listed in the table to the lower right.

Suggested Items for SM1-Threaded Collimation Assembly
Item #	Qty.	Description
SM1RR	2	Ø1" Retaining Ring (One Each Included with SM1V05 & SM1L03)
SPW801	1	Adjustable Spanner Wrench^a
ACL2520U-A^b, ACL2520U-B^b, ACL2520U-DG6-A^b, ACL2520U-DG6-B^b, ACL2520U^b, or ACL2520U-DG6^b	1	Aspheric Condenser Lens (with or without Diffuser)
SM1V05^c	1	Ø1" Rotating Adjustable Length Lens Tube, 1/2" Long
SM1L03	1	Ø1" Lens Tube, 0.30" Long

While these components are SM1 threaded, we recommend our adjustable spanner wrench due to the steep curvature of the aspheric condenser lens.
-A and -B refer to the type of AR coating on the lens. Thorlabs' LEDs with a nominal wavelength between 365 nm and 660 nm would require the -A coating, while the LEDs with a nominal wavelength between 730 nm and 1050 nm would require the -B Coating. IR LEDs that emit past 1050 nm can be collimated using an uncoated condenser lens, such as the ACL2520U. Deep UV LEDs with a wavelength ≤340 nm require a lens fabricated from UV Fused Silica, since many standard varieties of glass do not transmit below 350 nm.
The SM1V10 Adjustable Lens Tube can also be used for this application, however, the translation range of the optic cell will be reduced from 7.6 mm (thread depth of the SM1L03) to 6 mm (thread depth of the LED). If used, the SM1L03 would no longer be needed in the assembly.

First, install the optic in the adjustable lens tube, which allows one to control the working distance of the lens while collimating the LED. The SM1-threaded (1.035”-40) SM1V05 comes with a locking nut and a retaining ring. For customers concerned with the homogeneity of the beam, the AR-coated aspheric condenser lens with diffuser (ACL2520U-DG6-A or
ACL2520U-DG6-B) is a good option. By the end of this step, the lens will rest on top of one retaining ring (SM1RR) and be secured in place by another retaining ring placed on top of it.

Use the spanner wrench (SPW801) to turn the included retaining ring in the adjustable length lens tube so that it is closer to the inside lip of the tube.
Carefully place the lens inside the adjustable length lens tube with the curved side facing away from the male-threaded end of the tube.
Secure the lens in place with another retaining ring (SM1RR) using the spanner wrench. Note: Do not use the SPW602 spanner wrench for this step. The thin SM1RR retaining ring does not provide sufficient clearance to tighten it with the SPW602 without scratching the steeply curved surface of an aspheric condenser lens.

Thread the male end of the SM1L03 lens tube into the female end of the LED and gently tighten it.
Partially thread the male end of the SM1V05 adjustable length lens tube assembly into the female end of the SM1L03-LED assembly.

Step 1(b) Setup for Collimating LED Assembly

Click to Enlarge
Setup for Adjustable Length Lens Tube and Lens

Click to Enlarge
Completed Assembly

Step 3: Complete Assembly of Lens Tubes and LED

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Setup for Lens Tubes and LED Assembly

Obtaining a Well-Collimated Beam
After installing the chosen mounting adapter on a mounted LED, the distance of the lens from the LED should be adjusted by following the steps below. A well-collimated beam has minimal divergence and will not converge at any point in the beam path. Be advised that due to the nature of the output from the LED (high emitter surface area), the beam cannot be perfectly collimated. Please refer to the table below for divergence data.

Power on the LED and check to see if it is properly collimated. It is easiest to check that the beam is collimated by noting the changes in the beam diameter over a range of about 1" to 2 feet away; change the distance of the lens from the LED and check again. Do this until the least divergent, non-converging, homogenous beam is obtained. The beam should be somewhat circular in diameter, may have a slightly polygonal shape, and should not be a clear image of the LED itself.
If you see an image of the LED, this means that the lens is not close enough to the LED. Move the lens closer to the LED until the image blurs and becomes homogenous – this is the point of collimation. Note: If the lens needs to be closer to the LED when using the SM1V05 assembly, use only one retaining ring to secure the lens in the SM1V05 so that the lens will rest on the inside lip of the SM1V05 adjustable length lens tube.

Click to Enlarge
Image of the LED

Click to Enlarge
Uncollimated Beam

Click to Enlarge
Collimated Beam

Once the proper collimation position of the lens has been found, lock the position of the lens in place. For the SM1V05 assembly described above, loosen it from the SM1L03 lens tube by about ¼ to ½ turn, rotate the external locking nut until it is flush with the edge of the SM1L03 lens tube, and gently tighten both the assembly and the locking nut by ¼ to ½ turn (there should be slight resistance; do not over tighten). This will lock the collimation position in place.

For the adjustable collimation adapters, simply tighten the locking screw using a 2 mm (5/64") hex key.

The table below provides examples of how the half viewing angle changes for select LEDs with the addition of a Ø1" aspheric condenser lens.

Item #	Color	Nominal Wavelength^a	Optimum Lens to Emitter Distance^b	Half Viewing Angle^c
			Optimum Lens to Emitter Distance^b	+1 mm Out of Focus^d	at Optimum Focusing Distance	-1 mm Out of Focus^d
			M365L2	UV	365 nm	12.7 mm	2.79°	1.32°	3.11°
M385L2	UV	385 nm	12.8 mm	2.68°	1.33°	3.06°
M505L3	Cyan	505 nm	13.2 mm	3.52°	2.72°	3.46°
M850L3	IR	850 nm	13.8 mm	3.29°	3.10°	3.93°
M940L3	IR	940 nm	13.9 mm	3.42°	2.46°	3.70°
MCWHL5	Cold White	6500 K^e	13.9 mm	3.41°	2.47°	3.14°

The specifications listed in the table above are nominal values specified by the LED manufacturer.
Optimum distance between the respective mounted LED and the ACL2520U lens used to collimate the beam.
Power loss to 1/e² (13.5%).
±1 mm out of focus from Optimum Distance between the respective mounted LED and the ACL2520U lens used to collimate the beam.
Correlated Color Temperature.

The divergence data was calculated using Zemax.

Click to Enlarge
Multi-LED Source Coupled to Microscope Illumination Port

Creating a Custom Multi-LED Source for Microscope Illumination

Thorlabs offers the items necessary to create your own custom multi-LED light source using two or three of the mounted LEDs offered below. As configured in the following example, the light source is intended to be used with the illumination port of a microscope. However, it may be integrated with other applications using Thorlabs' versatile SM1 Lens Tube and 30 mm Cage Systems. Thorlabs also offers integrated, user-configurable 4-Wavelength LED Sources.

Design & Construction

First, light will be collimated by lenses mounted in lens tubes. Dichroic mirrors mounted in kinematic cage cubes then combine the output from the multiple LEDs. The mounted LEDs may be driven by LEDD1B Compact T-Cube LED Drivers (power supplies are sold separately). The LEDD1B LED Drivers allow each LED's output to be independently modulated and can provide up to 1200 mA of current. Please take care not to drive the LED sources above their max current ratings.

When designing your custom source, select mounted LEDs from below along with dichroic mirror(s) that have cutoff wavelength(s) between the LED wavelengths. The appropriate dichroic mirror(s) will reflect light from side-mounted LEDs and transmit light along the optical axis. Please note that most of these dichroic mirrors are "longpass" filters, meaning they transmit the longer wavelengths and reflect the shorter wavelengths. To superimpose light from three or more LEDs, add each in series (as shown below), starting from the back with longer wavelength LEDs when using longpass filters. Shortpass filters may also used if the longer wavelength is reflected and the shorter wavelength is transmitted. Sample combinations of compatible dichroic mirrors and LEDs are offered in the three tables below.

It is also necessary to select an aspheric condenser lens for each source with AR coatings appropriate for the source. Before assembling the light source, collimate the light from each mounted LED as detailed in the Collimation tab. For mounting the aspheric lenses in the SM1V05 Lens Tubes using the included SM1RR retaining rings, we recommend the SPW801 Adjustable Spanner Wrench. A properly collimated LED source should have a resultant beam that is approximately homogenous and not highly divergent at a distance of approximately 2 feet (60 cm). An example of a well-collimated beam is shown on the Collimation tab.

After each LED source is collimated, thread the SM1V05 Lens Tubes at the end of each collimated LED assembly into their respective C4W Cage Cube ports using SM1T2 Lens Tube Couplers. Install each dichroic filter in an FFM1 Dichroic Filter Holder, and mount each filter holder onto a B4C Kinematic Cage Cube Platform. Each platform is then installed in the C4W Cage Cubes by partially threading the included screws into the bottom of the cube, and then inserting and rotating the B4C platform into place. Align the platform to the desired position and then firmly tighten the screws. To connect multiple cage cubes and the microscope adapter, use the remaining SM1T2 lens tube couplers along with an SM1L05 0.5" Lens Tube between adjacent cage cubes. Finally, adjust the rotation, tip, and tilt of each B4C platform to align the reflected and transmitted beams so they overlap as closely as possible.

If desired, a multi-LED source may be constructed that employs more than three LEDs. The limiting factors for the number of LEDs that can be practically used are the collimation of the light and the dichroic mirror efficiency over the specified range. Heavier multi-LED sources may be supported with our Ø1" or Ø1.5" Posts.

Click to Enlarge
Three-LED Source Using Components Mounted LEDs and Dichroic Mirrors
Detailed in Example Configuration 1

Parts List
#	Product Description		Item #	2 LEDs	3 LEDs
#	Product Description		Item #	Item Qty.
1	Microscope Illumination Port Adapter:	Olympus IX or BX	SM1A14	1	1
		Leica DMI	SM1A21
		Zeiss Axioskop	SM1A23^a
		Nikon Eclipse Ti	SM1A26
2	Mounted LED^b		-	2	3
-	T-Cube LED Driver, 1200 mA Max Drive Current		LEDD1B^c	2	3
-	15 V Power Supply Unit for T-Cube		KPS101^c	2	3
3	4-Way Mounting 30 mm Cage Cube		C4W	1	2
4	Kinematic Cage Cube Platform for C4W/C6W		B4C	1	2
5	30 mm Cage-Compatible Dichroic Filter Mount		FFM1	1	2
6	Dichroic Filter(s)^d		-	1	2
7	Externally SM1-Threaded End Cap		SM1CP2	1	2
8	SM1 (1.035"-40) Coupler, External Threads, 0.5" Long		SM1T2	3	5
9	Ø1" SM1 Lens Tube, 1/2" Long External Threads		SM1V05	2	3
-	Aspheric Condenser Lens	AR-Coated 350 - 700 nm	ACL2520U-A^c,e	2	3
-	Aspheric Condenser Lens	AR-Coated 650 - 1050 nm	ACL2520U-B^c,e	2	3
10	SM1 Lens Tube, 0.3" Thread Depth		SM1L03	2	4
-	Blank Cover Plate with Rubber O-Ring for C4W/C6W		B1C^c	1	2

The SM1A23 Zeiss Axioskop Microscope Adapter is shown.
Mounted LEDs are available below.
Item not pictured.
Please see the following tables for suggested compatible LED and dichroic filter combinations, or create your own by taking into account the transmission and reflection wavelength ranges of our Dichroic Filters.
Lenses are mounted in the SM1V05 Lens Tube in front of each LED. For each lens, select an AR coating corresponding to the emission wavelength of the LED source.

Example Configuration 3
Mounted LEDs
#	Item #
2a	M1050L2
2b	MCWHL5
Dichroic Filter(s)
#	Item #
6a	DMLP900R

Example Configuration 2
Mounted LEDs
#	Item #
2a	M625L4
2b	M455L3
2c	M1050L2
Dichroic Filter(s)
#	Item #
6a	DMLP505R
6b	DMSP805R

Example Configuration 1
Mounted LEDs
#	Item #
2a	M625L4
2b	M530L3
2c	M455L3
Dichroic Filter(s)
#	Item #
6a	DMLP605R
6b	DMLP505R

Click to Enlarge
Beam Profile of Source with 3 Mounted LEDs

Click to Enlarge
Two-LED source. This is the same as Example 1, but with the blue LED removed.

Item #	Information File	Available Ray Files	File Size
M365L2	M365_Info.pdf	100,000 Rays and 1 Million Rays	27.4 MB
M385L2	M385_Info.pdf	1 Million Rays and 5 Million Rays	148 MB
M450LP1^a	LD_CQAR_20150731_info.pdf	100,000 Rays, 500,000 Rays, and 5 Million Rays	123 MB
M455L3^a,b	LD_CQ7P_290311_info.pdf	100,000 Rays, 500,000 Rays, and 5 Million Rays	125 MB
M505L3^a	LV_CK7P_191212_info.pdf	100,000 Rays, 500,000 Rays, and 5 Million Rays	123 MB
M850L3^a	SFH4715S_100413_info.pdf	100,000 Rays, 500,000 Rays, and 5 Million Rays	140 MB
M940L3^a	SFH_4725S_110413_info.pdf	100,000 Rays, 500,000 Rays, and 5 Million Rays	140 MB

A radiometric color spectrum, bare LED CAD file, and sample Zemax file are also available for these LEDs.
The ray data files for the M455L3 can be used for the M470L3 as well by manually resetting the source wavelength in Zemax. Wavelength-specific data and files, such as the radiometric color spectrum and sample Zemax files, only apply to the M455L3.
The ray data files for the M617L3 can be used for the M590L3 as well by manually resetting the source wavelength in Zemax. Wavelength-specific data and files, such as the radiometric color spectrum and sample Zemax files, only apply to the M617L3.

Ray data for Zemax is available for some of the bare LEDs incorporated into these high-powered light sources. This data is provided in a zipped folder that can be downloaded by clicking on the red document icons () next to the part numbers in the pricing tables below. Every zipped folder contains an information file and one or more ray files for use with Zemax:

Information File: This document contains a summary of the types of data files included in the zipped folder and some basic information about their use. It includes a table listing each document type and the corresponding filenames.
Ray Files: These are binary files containing ray data for use with Zemax.

For the LEDs marked with an superscript "a" in the table to the right, the following additional pieces of information are also included in the zipped folder:

Radiometric Color Spectrum: This .spc file is also intended for use with Zemax.
CAD Files: A file indicating the geometry of the bare LED. For the dimensions of the high-power mounted LEDs that include the package, please see the support drawings provided by Thorlabs.
Sample Zemax File: A sample file containing the recommended settings and placement of the ray files and bare LED CAD model when used with Zemax.

The table to the right summarizes the ray files available for each LED and any other supporting documentation provided.

Components for Cerna^® Compatibility
Epi-Illumination
WFA2001 Epi-Illuminator Module
Trans-Illumination
Illumination Kits

Using Mounted LEDs in Cerna^® Microscope Systems

Mounted LEDs, which can have either narrowband or broadband spectra, are useful for a range of applications within Thorlabs' Cerna microscopy platform:

Fluorescence Microscopy
Brightfield Microscopy
Near Infrared/Infrared (NIR/IR) Microscopy

If you are interested in using a mounted LED with a Cerna modular microscopy system, the mounted LED can be attached by way of the single-cube epi-illuminator module (Item # WFA2001), which contains AR-coated optics optimized for the 350 - 700 nm wavelength range. The mounted LED and epi-illuminator module are connected together by an externally threaded coupler (Item # SM1T10, provided with the WFA2001), which includes two knurled locking rings (Item # SM1NT, also provided with the WFA2001) that are tightened by hand. The mounted LED is then powered by a driver, sold separately. Please see the LED Drivers tab to identify the appropriate driver for your mounted LED. If you wish to connect multiple mounted LEDs to the epi-illuminator module, contact Technical Support.

Click to Enlarge
An exploded view of the mounted LED and its connection with the WFA2001 epi-illuminator module.

Click to Enlarge
Attaching the mounted LED is possible before or after connecting the epi-illuminator module to the microscope.

Click to Enlarge
The mounted LED and epi-illuminator module attached to the Cerna microscope.

Please see the Overview tab to choose the appropriate color spectrum of mounted LED for your imaging needs. Again, note that the epi-illuminator module is optimized for 350 - 700 nm wavelength illumination sources.

Certain mounted LEDs are also compatible with our illumination kits for trans-illumination. Please contact Technical Support if you wish to use an LED not currently offered as a component of these kits, as the collimating optics are optimized for certain beam characteristics.

Posted Comments:

bhebert (posted 2018-12-20 10:17:05.867)

Do you offer a variety of this the uses the ushio EDC940DS-1100-S5 or can a special version be made?

wskopalik (posted 2018-12-28 05:36:06.0)

This is a response from Wolfgang at Thorlabs. Thank you very much for your inquiry! Unfortunately, we don't offer a mounted LED which uses this particular LED chip. I have however looked at the data sheet of this LED chip and the M940L3 seems to be quite similar in performance. I will contact you directly to discuss your requirements in detail.

yu-pu.lin (posted 2018-12-19 10:29:50.383)

What is the approximative spot size of the collimated beam at 20-50 mm distance using the SM2F32 Adjustable Collimation Adapter? (LED = M940L3) Thank you!

YLohia (posted 2019-01-04 04:00:51.0)

This is a response from Michael at Thorlabs. Thank you very much for your inquiry! I will perform a Zemax simulation with the M940L3 in combination with the adjustable collimator to determine the divergence angle and thus the resulting beam diameter at a distance of 20-50mm. I will send you the results directly.

fcouweleers (posted 2018-12-17 10:55:02.65)

can you share which LED (probably OSRAM) is present in this assembly

nreusch (posted 2018-12-21 02:34:32.0)

This is a response from Nicola at Thorlabs. Thank you for your inquiry! Unfortunately, we do not share the LED chip details of our mounted LEDs in general. Please contact your local Tech Support Team if you need specific information about the characteristics of the chip.

joe.bron (posted 2018-11-21 10:48:45.81)

Will a diffuse condenser lens have much effect on its collimation compared to a clear one?

wskopalik (posted 2018-11-29 07:17:48.0)

This is a response from Wolfgang at Thorlabs. Thank you very much for your inquiry! The quality of the collimation, i.e. the remaining divergence, will be roughly the same with or without a diffuser. The diffuser smoothens the intensity distribution of the beam and makes it more homogeneous. It will also smoothen the edge of the beam a bit so the beam would look a bit wider. The main disadvantage of a diffuser is that the transmitted power would be lower than without a diffuser due to absorption and reflection.

user (posted 2018-10-31 11:23:54.427)

Hi, Can I know if M415LP1 compatible with the LED driver LEDD1B? Thanks

nreusch (posted 2018-11-09 10:09:57.0)

This is a response from Nicola at Thorlabs. Thank you for your inquiry! The forward voltage of LEDD1B is high enough to drive M415LP1, but the maximum current is 1.2 A only, whereas the maximum drive current of the LED is 2 A. To reach the specified minimum output power of 1640 mW, you would need to apply a higher current than LEDD1B can provide. I therefore recommend using DC2200 as driver.

mabashin (posted 2018-10-29 14:22:57.28)

Hello could you please send/share Zemax files for M625L3 and M730L4 LED sources?

nreusch (posted 2018-11-09 10:11:22.0)

This is a response from Nicola at Thorlabs. Thank you for your inquiry! Unfortunately, we do not have Zemax files for these two LEDs. I will, however, send you ray files and an instruction on how to load them into Zemax.

p.adhikari (posted 2018-09-18 13:47:18.12)

Need a high output green LED > 10,000 mcd

nreusch (posted 2018-09-24 11:08:18.0)

This is a response from Nicola at Thorlabs. Thank you for your inquiry. Unfortunately, we specify our LEDs by means of radiometric measures only. I will contact you directly to provide assistance for the conversion into photometric units.

zh_tooleng (posted 2018-07-31 17:30:08.13)

hello，I am going to buy a light source to use in my microscopic system.Here are my list: [M1300L3],[LEDD1B],[ACL2520U],[SM1RR],[SM1V05][SM1L03] Do they meet my needs? And I want to know the best distance between the LED and the lens. Thank you!

swick (posted 2018-08-06 04:14:53.0)

This is a response from Sebastian at Thorlabs. Thank you for the inquiry. The selection look adequate for collimating the M1300L3. Basically the distance of the lens to the LED should be the back focal length. The best distance between LED and lens depends on the optical path in your microscope. I recommend to start with the back focal length and optimize the distance until you get best results. I contacted you directly for assistance.

daming.chen (posted 2018-07-31 12:39:05.987)

Hello, For the M850LP1 LED, which power supply product should be purchased? Thank you.

mmcclure (posted 2018-07-31 08:07:54.0)

Hello, thank you for contacting Thorlabs. For M850LP1 we recommend to use DC2200 because only this device can drive the LED at its maximum current of 1.5 Ampere. Other drivers (LEDD1B, DC4100, DC4104) would basically work with M850PL1 but with reduced optical output power.

karol.686 (posted 2018-07-12 08:16:48.163)

Hi, we are going to buy M625L3 from Thorlabs, we would like to know the spatial and temporal coherence length of this diode. Thanks

swick (posted 2018-07-18 03:39:02.0)

This is a response from Sebastian at Thorlabs. Thank you for the inquiry. The spatial coherence for LEDs is typically very small. We do not test the spatial- or temporal coherence for our LEDs so we can not provide specific data. I contacted you directly for further assistance.

alicia.gomis-berenguer (posted 2017-09-28 12:19:44.79)

I would like to know what is the mode of operation of the MCWHLP1 LED using as a power supply LIU-PS LIU Series Power Supply. Is it a continuous wave (on all the time)? or is it a pulse modulation (on/off with time)? Thanks!

swick (posted 2017-10-03 03:55:45.0)

This is a response from Sebastian at Thorlabs. Thank you for the inquiry. The LIU-PS is a voltage source and designed for our LIU-Series, which is a LED array light source (20 individual LEDs). LIU-PS will not work with our high-power LEDs. We recommend to use current sources like switching drivers (e.g. LEDD1B). I will contact you directly for further assistance.

carlos.macias (posted 2017-06-28 17:57:47.053)

Hello. Is it possible to couple MNWHL4 to a multimode fiber or light guide?

wskopalik (posted 2017-07-04 04:26:30.0)

This is a response from Wolfgang at Thorlabs. Thank you very much for your inquiry! Yes, it is possible to couple this LED to a multimode fiber or a light guide. We don't have a ready-to-use product for this, but you can use Thorlabs' components for the coupling. I have contacted you directly to discuss your application and the necessary components in more detail.

jpaufiqu (posted 2017-06-20 13:31:54.28)

Hi, I see high frequency fluctuations on the flux output generated by the LED at 660nm. I use the M660 and the LEDD1B controller in continuous mode, below the maximum current (using the setting 1000 mA, to a rather high setting in this mode ~50 to 70% of the knob range). Fluctuations appear at the level of the kHz: we sample our signals at about 1.05 kHz, and observe sporadic drops (down to ~30% of the nominal value). Are you aware of a feature of the controller or the LED driver or of the LED electronics which would be related to this effect?

wskopalik (posted 2017-06-22 06:01:47.0)

This is a response from Wolfgang at Thorlabs. Thank you very much for your inquiry! The only expected fluctuation on the LEDD1B would be the ripple on its current which is specified to 8mA max. You use the LEDD1B at about 500-700mA so the ripple would be less than 1% of the current and couldn't account for the large drops in power you see. I will contact you directly to discuss this issue in further detail so we can find the reason for these power drops.

ken_Chin (posted 2017-02-09 17:26:16.85)

does M365LP1 have a calibration report with NIST or PTB Traceability?

wskopalik (posted 2017-02-10 02:58:01.0)

This is a response from Wolfgang at Thorlabs. Thank you very much for your inquiry. These LEDs are tested during production to ensure that they work properly and that they emit the specified power. But unfortunately they cannot be calibrated. I have contacted you directly to discuss your requirements.

eddie.ross (posted 2016-09-27 10:40:13.433)

Can you provide the switch off time for the MBB1L3 LED and could you also provide a clarification as to whether this LED uses phosphor to provide white light?

swick (posted 2016-09-28 04:39:43.0)

This is a response from Sebastian at Thorlabs. Thank you for the inquiry. The MBB1L3 LED may not turn off completely when modulated at frequencies above 1 kHz with a duty cycle of 50%. For modulation at frequencies above 1 kHz, the duty cycle may be reduced. For example, 10 kHz modulation is attainable with a duty cycle of 5%. The broadband emission is luminescence generated by Phosphor.

alee (posted 2016-06-22 14:18:07.74)

I want to use an LED as an excitation source on an olympus BX60 microscope. you sell the product for this, however it uses a 2" lens and when I look down the microscope illumination port it has a 25-30mm diameter restriction in it meaning most of the light from the LED would be blocked. So would it be better to use a 1" lens to collimate the LED as described below, rather than the product specified for the olympus microscope, and how would I fix this to the microscope, do you sell the olympus adapter without a lens?

besembeson (posted 2016-06-22 01:59:06.0)

Response from Bweh at Thorlabs USA: Due to the large divergence angles of these LEDs, the 2" diameter lenses will collect more power than the 1" optic. For example, with a 60deg half angle divergence LED and a 20mm (or 12mm BFL) 1" lens, you will only be capturing about 56% of the LED output, which may or may not be suitable depending on your application. Should you need to use the 1" LED collimators, you would need an SM2T2 and we can provide the corresponding 2" adapter without the lens inside.

ludoangot (posted 2016-05-30 08:16:41.943)

Very pleased with your offering a 2" adjuster. Unfortunately, 3 out of 4 of the adjusters I am working with (ACP2520, SM2P50 and SM1P25) are hard to rotate. From my first observations, it seems it may be related to the environment conditions (temperature, humidity). Would it be possible you provide your customers with the proper working environment conditions for the SM2P50 and SM1P25? Note that one SM1P25 doesn't have the problem at all, but the ACP2520 did (I modified it myself for smooth rotation), as well as the latest SM1P25 and SM2P50 I've received. I have contacted you and provided a detail report of my observations but only received a proposition from Thorlabs application engineer Yi-Ma to change the parts in question. This offer doesn't seem to address my question nor would it help if the replacements have the same issue.

besembeson (posted 2016-05-31 03:25:32.0)

Response from Bweh at Thorlabs USA: Thanks for your feedback. We will check to see if we can replicate your observations regarding SM2P50 and SM1P25 performance under various humidity conditions. I will be in touch via email.

cbrideau (posted 2016-02-12 19:46:34.71)

Would it be possible to purchase the extra-thick SM1-threaded and SM2-threaded retaining rings for Aspheric condenser lenses separately? I use the 1" and 2" diameter aspheric condensers fairly often, and the regular retaining rings don't work well with them.

shallwig (posted 2016-02-18 02:30:50.0)

This is a response from Stefan at Thorlabs. Thank you very much for your feedback. We have contacted you directly to offer you these retaining rings separately.

juandspcf (posted 2015-10-24 13:05:56.75)

Dear I would like to use your module M625L3 with your Adjustable Collimation Adapter ACP2520-A, but I also would like to know how much power is lost after of the collimation step because I want to focus the collimated beam and make a filtering using a pinhole Juan

shallwig (posted 2015-10-27 05:04:34.0)

This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. I just tested this, the output power of the M625L3 without collimator attached measured with an integrating sphere was 840mW. The output power of the well collimated LED using the ACP2520-A was 430mW. The min/max power level measured with this collimator at its limit stops was 360mW and 640mW. I will contact you directly to discuss your application in detail.

sjs09 (posted 2014-08-20 12:09:39.15)

Dear Thorlabs, The thorlabs LED collimation page describes using an SM1 lens tube and aspheric lens. It seems you advise we buy an adjustable 1/2" lens tube and extend it with a 0.30" adapter. Since ThorLabs sells an adjustable 1" lens tube (SM1V10) this seems rather redundant, unless the thread inside the LED casing does not allow it to collimate. There is no information about the depth of the SM1 thread inside the LED casing. My question is this: Could you tell me whether SM1V10 would be able to collimate the LED on its own, or does it require SM1V05 and the 0.30" spacer? If this is the case, I suggest you extend the thread on the LED case, if possible, to simplify the process. Kind regards, Sam S

myanakas (posted 2014-08-20 11:11:48.0)

Response from Mike at Thorlabs: Thank you for your feedback. The thread depth is stated within our mechanical drawings (http://www.thorlabs.com/thorcat/MTN/M530L3-AutoCADPDF.pdf) which can be found by clicking on the red "docs" icons by the items numbers below. The thread depth for these LEDs is 6 mm. Based on this feedback we have added this information to the Overview tab of the web page. The SM1V10 can be used in place of the SM1V05 and SM1L03 pairing. However, the current recommendation allows for a slightly longer translation range of the optic due to the 7.6 mm depth of the internal threading in the SM1L03. The Collimation tab has also been updated to include the use of the SM1V10 as a collimation solution for these LEDs.

Carlo.Vicario (posted 2014-05-14 11:11:40.42)

Dear Sirs, I would like to have information about the dependence between the emitted power versus the LED driving current. Is this relationship linear? Best regards, Carlo

shallwig (posted 2014-05-15 08:38:18.0)

This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. On page 3 of the manufacturer’s spec sheet you can find a curve showing current vs. output power on a relative scale to 350mA . In this range you will see a linear relationship, however we have no information how this relationship changes in the range from 350mA to 700mA. We have tested this LED only at 700mA as this is the maximum drive current our heat sink system can also manage. You can find the manufacturer spec sheet of this LED on our website here: http://www.thorlabs.com/thorcat/23300/M1050L2-MFGSpec.pdf Our spec sheet can be found here: http://www.thorlabs.com/thorcat/23300/M1050L2-SpecSheet.pdf In general information about this relationship if available, can be found in the manufactures spec sheet. I hope this information helps you further, please let me know if there is anything else you need.

a.andreski (posted 2014-03-09 20:08:42.05)

Can we order one of these packages but with the LED and the mounting heatsink not assembled/soldered at Thorlabs? We have our own assembly and thermal film bonding process. Aleksandar

tschalk (posted 2014-03-31 09:25:56.0)

This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. We will contact you directly with a quotation.

jan.moritz.ellinghaus (posted 2013-11-22 08:26:13.437)

Dear Sir or Madame, Can you send me the ray file for Zemax for the LED MWWHL3 Warm White 3000K? I could not quite identify which LED is actuall mounted. I would like to simulate the combination of this LED with the COP1-A in Zemax and combine this with some additional optical elements. Thank you in advance for your help! Kind regards, Jan Ellinghaus

tschalk (posted 2013-12-02 03:35:07.0)

This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. We do have Zemax files available and i will contact you directly with more detailed information.

jan.haschke (posted 2013-08-23 12:24:08.587)

Dear Sir or Madam, I have a question concerning the mounted LED system you supply. We are using it as a BIAS illumination source in a measurement setup. I was wondering what the EEPROM on the PCB is for. Is it in any way affecting the current supply of the LED? In particular, is it possible that it creates some noise on the current supplying the LED? Thank you in advance for your help! Best regards, Jan Haschke

tschalk (posted 2013-08-26 10:08:00.0)

This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. Our Mounted High Power LEDs are all equipped with an EEPROM where the operating parameters are stored. The LED drivers DC2100, DC4100 and DC4104 read out the EEPORM and set the maximum operating current to the stored value. This way a current overload can be avoided. The driver LEDD1B is not able to read out the EEPROM and the current limit has to be set manually. The EEPROM will not cause noise to the current supply. I will contact you directly with more detailed information.

jvigroux (posted 2012-09-24 10:22:00.0)

A response form julien at Thorlabs: Than you for pointing this out. We corrected the presentation on our website so that now the wrench recommended is the SPW801. We will send you a replacement for the lens together with the new case.

gir (posted 2012-09-20 16:20:24.0)

One other thing: On the application page where it explains how to collimate the LED, it says to use a SPW602 spanner wrench to secure the aspheric lens with one retaining ring on each side. I did this, and the SPW602 carved a circle on the front surface of the lens. Please change this text to instruct people to use a different spanner, so they don't inadvertently scratch their collimating lens.

gir (posted 2012-09-19 20:09:14.0)

Hi: I have a minor issue to relay about the packaging of the mounted LEDs. I bought an M735L3 late last week and received it today. The plastic case it comes in is not well designed or built. Specifically, the red latch on front broke off while I was trying to figure out how to open the case. And it took two of the black plastic hinge-posts with it, so even when I put the latch back on the case, the case won't stay shut anymore. It seems silly to provide these in a hard shell case if the latch can't withstand a bit of force from a novice case-opener.

jlow (posted 2012-08-30 14:23:00.0)

Response from Jeremy at Thorlabs: Is your power supply a voltage source or is it a current source? It is highly recommended that you drive these LEDs with a current source instead. If you used a 5V constant voltage source (@ 3A), then you will most likely be injecting 3A of current into this LED and thus destroyed it (max. current for MCWHL2 is 1.6A). Please note that the typical forward voltage for the MCWHL2 is only about 3.5V. It could also be that you have not connected this correctly. I will get in contact with you directly to check on the details on your setup.

doron.azoury (posted 2012-08-30 11:16:39.0)

Hi, I just recieved the MCWHL2 LED. I control it by a DC power supply. I set the voltage limit to ~5V and tried to rise the current, but the LED doesn't seem to be working. Am I doing something wrong? (the DC supplier can deliver up to 3A)

jlow (posted 2012-08-22 08:19:00.0)

Response from Jeremy at Thorlabs: We do not have a precise number for this, but based on some old data, the rise and fall times are both on the order of 20ns or so.

riclambo (posted 2012-08-20 13:48:19.0)

Hello Thorlabs. I am using the 385 nm LED and I need to know its on-off switching time, particularly its off time i.e. when you turn it off, what is the extinction time of the after glow. Even if this is not known precisely, as order of magnitude value would be very useful.

jvigroux (posted 2012-07-16 09:20:00.0)

A response from Julien at Thorlabs: Dear HongYang, thank you for your inquiry! The curve displayed on our website is aimed at showing the effect of long term thermal stabilization, ie. heat transfer from the LED chip and PCB to the heat sink. Should the thermal exchange channel be poor, it can be that the temperature of the LED will settle at a too high temperature, which would lead to the situation displayed by the curve "LED with poor thermal management". The time scale for this effect is indeed in the seconds range and the curve was plotted accordingly, which can give the impression that the rise time is slow. This rise time is however much shorter than visible on this curve and is typically of a few 10's nanoseconds. The main limitation in this case is the capacitance of the LED and thermal effects as plotted on the aforementioned curve will only be relevant at on a much longer time scale and much lower in magnitude than the capacitance related limitation of the rise time.

LuHongyang (posted 2012-07-16 03:08:26.0)

The figure in the tab 'Stability' shows that the rise time of these LEDs is several seconds. So does it mean that LED cannot be fully charged when modulated at a high frequency? If so, that will introduce instability to the power in that situation, I suppose. Thanks a lot. Hongyang.

jvigroux (posted 2012-07-13 12:05:00.0)

A response from Julien at Thorlabs: Thank you for your inquiry! The radiation characteristics of the LED, which corresponds to the variation of the emitted intensity with the angular departure from the optical axis, is plotted for all our LED's in the mfg spec sheets. Those spec sheet can be downloaded by clicking on the red document icon next to the product number of the LED.

danielramm (posted 2012-07-13 14:58:52.0)

Do you have information about the angle in which the light is emitted by the uncollimated mounted LED? Iam using the 455nm und the 850nm source.

jvigroux (posted 2012-05-30 06:45:00.0)

A response from Julien at Thorlabs: thank you for your inquiry! the 500mA that are specified by the manufacturer of the LED in the MFG spec sheet apply only for the bare LED. Due to the fact that the LED is mounted on a large heat sink and that the thermal coupling to it is very good, the LED can be used in constant mode at currents up to 700mA.

andrew_yablon (posted 2012-05-29 17:24:25.0)

What is the practical current limit for running the M1050L2 with the LEDDB1? In one place you have listed this limit as 700 mA and in a different place you have listed it as 500 mA. What is the correct maximum current limit? Thank you, Andrew Yablon andrew_yablon@interfiberanalysis.com

jvigroux (posted 2012-04-23 03:56:00.0)

A response from Julien at Thorlabs: Thank you for your inquiry. We can provide a Zemax model for the LED chip mounted in this LED. I will contact you directly to send you the information per email.

tcohen (posted 2012-04-19 09:17:00.0)

Response from Tim at Thorlabs: Thank you for your feedback! We will look into providing this for you and will update you shortly.

arb (posted 2012-04-18 15:32:24.0)

Can you provide optical power density curves for M940L2? (expressed in W/m2 or W/m2/um)

jvigroux (posted 2011-12-06 05:58:00.0)

A response from Julien at Thorlabs: Thank you for your inquiry! The approach you intend to use is unfortunately only partially possible. The problem is that the voltage drops across the LEDs will add up when they are connected in series. The specified operating voltage for this LED is 6.8V. As the compliance voltage of the LEDD1B is typically 12V, you will be only able to connect a maximum of two LEDs in series, unless you reduce drastically the current. I will contact you directly to discuss your application and see which approach is the best suited for your application.

sborn (posted 2011-12-05 17:29:12.0)

I have four M505L1 mounted LEDs that I would like to connect in series with one LEDD1B. How should I wire them? Also, I've removed the wiring from three of the M505L1 mounts, but the LED is still attached.

bdada (posted 2011-10-12 12:49:00.0)

Response from Buki at Thorlabs: Thank you for your feedback. We will expand the information on our webpage. While we work on updating this page, please contact TechSupport@thorlabs.com for assistance in matching the catalog lens to the collimation adapter.

user (posted 2011-10-12 09:56:51.0)

First bullet on Collimation Adapter is "AR-Coated Aspheric Lens with Low f#" but i couldn't find the f# or NA, this would be nice to know. A link to the lens if it is a catalog lens would also help.

user (posted 2011-10-12 09:51:12.0)

Is there data available on the angular distribution of the output of these LEDs.

jjurado (posted 2011-08-17 14:30:00.0)

Response from Javier at Thorlabs to dheidbrink: The length of the pins is 5 mm (+/-0.5mm).

dheidbrink (posted 2011-08-16 18:05:32.0)

How long are the M8 leads on the mounted LEDs?

jjurado (posted 2011-07-11 09:04:00.0)

Response from Javier at Thorlabs to last poster: Thank you very much for your feedback! We will embark on a project to provide the FWHM values for out mounted LEDs and will post the results on the web shortly. In the meantime, please contact us at techsupport@thorlabs.com if you have any further questions or comments.

jjurado (posted 2011-07-08 17:11:00.0)

Response from Javier at Thorlabs to last poster: Thank you very much for your feedback. You are correct. A divergence of 3 degrees is a better practical assessment than my previously mentioned 1 degree, which is a best case, theoretical value. I apologize if this information was misleading. Please contact us at techsupport@thorlabs.com if you have any further questions or comments.

user (posted 2011-07-08 10:11:31.0)

*** Response from Javier at Thorlabs to skooi: Thank you very much for contacting us. The divergence of these mounted LEDs is in the order of 1 degree. The large, thick condenser used in this assembly generates a circular output beam, rather than a projection of the LED emitters. This has not been my experience at all. The divergence of our M660L2 is on the order of 3 and it is definitely imaging the LED, and not a uniform circular beam spot.

user (posted 2011-07-08 10:06:59.0)

it would be helpful if you would explicitly state the FWHM of the LED output.

jvigroux (posted 2011-05-12 11:40:00.0)

A response form Julien at Thorlabs: Dear Sewan, the use of another driver than the Thorlabs driver is of course possible. The simplest design is a DC current source. A pulse controlled approach is of course also possible. I will contact you directly in order to see what are the requirements of your experiment and what you had in mind for the LED control.

sfan (posted 2011-05-10 23:15:18.0)

Dear Thor Labs Sales Associate, We are planning to purchase the model M505L1 led module. It seems that to provide power to the led unit, a Thor Labs led driver is needed. Can another type of driver be used to provide power to the led, for example, through a pulse controlled MOSFET transistor ? Please advice as to the above. Thank you for your help. Sewan Fan Hartnell College Salinas, CA

jjurado (posted 2011-04-04 17:38:00.0)

Response from Javier at Thorlabs to skooi: Thank you very much for contacting us. The divergence of these mounted LEDs is in the order of 1 degree. The large, thick condenser used in this assembly generates a circular output beam, rather than a projection of the LED emitters.

skooi (posted 2011-04-04 12:45:09.0)

How collimated should we expect to be able to make the light out of these LEDs? If we purchase one of the collimation lenses, does the light collimate as a circular beam or just as the square shape of the LED?

jjurado (posted 2011-02-18 17:44:00.0)

Response from Javier at Thorlabs to denis.battarel: Thank you for submitting your inquiry. There are a couple of options. You can use the LEDD1B driver, which has a maximum output of 1200 mA, or you can opt for the DC2100, whose maximum output current is 2000 mA. Both of these drivers can be operated in constant current mode, trigger mode, and modulation mode. Regarding the condenser lens, we would recommend using the ACL2520. Its diameter is 25 mm, so it is compatible with our SM1 lens tubes. LEDD1B http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=2616&pn=LEDD1B#3018 DC2100 http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=4003&pn=DC2100 ACL2520 http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=3835&pn=ACL2520

denis.battarel (posted 2011-02-18 15:01:03.0)

I would like to use the LCWHL2 white light LED with SM1 tube but what power supply can I use? I need maximum light flux, so the 1600mA are needed. I do not need to modulate the light. I have seen on your web site that previous driver going to 1200mW is obsolete but have not seen the new driver. What condenser lens would you recommend? I need it to fit in a SM1 tube.

Thorlabs (posted 2010-10-14 16:29:12.0)

Response from Javier at Thorlabs to godina: we are discussing internally the development of a mounted 560 nm LED. I will contact you directly with more details.

godina (posted 2010-10-14 10:28:30.0)

Are you guys coming out with an M560L2? (mounted LED, 560nm pure green?

Thorlabs (posted 2010-09-02 13:48:38.0)

Response from Javier at Thorlabs to mjg: we offer a version of the M365L2 mounted LED which includes a condenser lens and a mounting adapter for Olympus BX & IX microscopes. The part number is M365L2-C1: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=2615

mjg (posted 2010-09-01 18:00:01.0)

Hello, Im looking to mount this unit onto the condenser column of an Olympus IX71 (i.e. to use it as a replacement for a white light source). Can you suggest a mounting solution? Thank you.

apalmentieri (posted 2010-03-04 10:03:37.0)

A response from Adam at Thorlabs to jrguest: The size of the LED on this device is 1x1mm^2. We will contact you directly so we can clarification on the optical invariant that you are looking for.

jrguest (posted 2010-03-03 19:52:14.0)

What is the size of the LED or LEDs on the device? I would like to know the optical invariant of this source.

apalmentieri (posted 2010-02-17 08:48:10.0)

A response from Adam at Thorlabs to Michael: It is possible to get an LED that outputs 385nm with a higher output power. I will contact you directly to get more information about your application.

michael.spurr (posted 2010-02-16 06:25:57.0)

Would it be possible to get an M385L1 that outputs a similar power (or as close as possible) to the M405L1? Thanks.

apalmentieri (posted 2010-01-29 11:07:15.0)

A response from Adam at Thorlabs to Michael: Thanks for the clarification. Just to clarify my previous statement, if you over drive the current beyond 1A, you will damage the LED beyond repair.

michael.spurr (posted 2010-01-29 06:53:11.0)

A response to Adam at Thorlabs: Sorry, I actually meant 1A (silly typo). The LED is currently being run at a constant voltage of just under 5V, so it is the current that I am concerned with. Thanks for the reply.

apalmentieri (posted 2010-01-27 09:18:16.0)

A response from Adam at Thorlabs to Michael: Typically LEDs are run at 5V or 12V. Using a voltage higher than 1V will not damage the LED if you can limit the amount of current reaching the device. LEDs are current run devices and will be damaged beyond repair if drive them with too much current. The M405L1 cannot be driven above 1000mA.

michael.spurr (posted 2010-01-27 03:50:48.0)

Can you tell me the risks associated with over-driving the M405L1 LED above 1V? What are the likely consequences in terms of output power and potential damage and how far above 1V would you have to go? Thanks.

klee (posted 2009-10-05 16:14:12.0)

A response from Ken at Thorlabs: Yes, these mounted LEDs are also plug and play compatible with the new DC2100.

acable (posted 2009-10-03 15:43:41.0)

Is this series of mounted LEDs plug and play compatible with the DC2100 driver.

javier (posted 2009-05-06 12:56:23.0)

Response from Javier at Thorlabs to booth: we currently do not offer a mounted LED with EEPROM in the 900-1500 nm range, but we can quote a special operating at 940 nm

booth (posted 2009-05-05 16:27:53.0)

I would like a product like the M850L1 LED source, but with longer wavelength. Something >900 and <1500nm.

Laurie (posted 2008-10-31 09:50:24.0)

Response from Laurie at Thorlabs to atashtoush: To modulate the MBLED you will need the LEDD1 T-Cube LED driver and a TPS001 15 V power supply. You will need to provide your own signal generator with the following requirements: Minimum Strobe Pulse Width: 50 µs Strobe Turn-On / Turn-Off Time: <25 µs. The maximum flash rate obtainable with the LEDD1 with full 100% modulation will be around 3 kHz with a maximum strobe effect up to 10 kHz. If you need to modulate at higher rates you would need to consider a laser driver. Depending on the driver, you can indirectly modulate to about 250 kHz. Above that value you need to RF modulation directly into the LED anode.

atashtoush (posted 2008-10-30 15:13:41.0)

Hi, can you tell me how can we modulate this led using square wave because. what voltage and offset ..... thanks

Light Emitting Diode (LED) Selection Guide
(Click Representative Photo to Enlarge; Not to Scale)
Wavelength	Unmounted LEDs	Pigtailed LEDs	LEDs in SMT Packages	PCB- Mounted LEDs	Heatsink- Mounted LEDs	Collimated LEDs for Microscopy (Item # Prefix^a)	Fiber- Coupled LEDs^b	High-Power LEDs for Microsocopy	4-Wavelength LED Source Options^c	LED Arrays
Single Color LEDs
245 nm	LED245W (0.07 mW)	-	-	-	-	-	-	-	-	-
250 nm	LED250J (1 mW Min)	-	-	-	-	-	-	-	-	-
255 nm	LED255J (1 mW Min)	-	-	-	-	-	-	-	-	-
260 nm	LED260W (0.3 mW) LED260J (1 mW Min)	-	-	-	-	-	-	-	-	-
265 nm	-	-	-	M265D2 (10 mW Min)	M265L3 (10 mW Min)	-	-	-	-	-
275 nm	LED275W (0.8 mW) LED275J (1 mW Min)	-	-	M275D2 (45 mW Min)	M275L4 (45 mW Min)	-	-	-	-	-
280 nm	LED280J (1 mW Min)	-	-	-	-	-	-	-	-	-
285 nm	LED285W (0.8 mW)	-	-	M285D3 (50 mW Min)	M285L5 (50 mW Min)	-	M285F4 (420 µW)	-	-	-
290 nm	LED290W (0.8 mW)	-	-	-	-	-	-	-	-	-
300 nm	LED300W (0.5 mW)	-	-	M300D3 (26 mW Min)	M300L4 (26 mW Min)	-	M300F2 (320 µW)	-	-	-
315 nm	LED315W (0.6 mW)	-	-	-	-	-	-	-	-	-
340 nm	LED341W (0.33 mW)	-	-	M340D3 (53 mW Min)	M340L4 (53 mW Min)	-	M340F3 (1.06 mW)	-	-	-
365 nm	-	-	-	M365D1 (190 mW Min)	M365L2 (190 mW Min)	M365L2 (60 mW)^d	M365F1 (4.1 mW)	SOLIS-365C (3.0 W)^e	Available (85 mW)	LIU365A (31 mW)
365 nm	-	-	-	M365D2 (1150 mW Min)	M365LP1 (11-50 mW Min)	M365LP1 (350 mW)^d	M365FP1 (15.5 mW)	SOLIS-365C (3.0 W)^e	Available (85 mW)	LIU365A (31 mW)
375 nm	LED375L (1 mW)	-	-	M375D4 (1270 mW Min)	M375L4 (1270 mW Min)	-	M375F2 (4.23 mW)	-	-	-
375 nm	LED370E (2.5 mW)	-	-	M375D4 (1270 mW Min)	M375L4 (1270 mW Min)	-	M375F2 (4.23 mW)	-	-	-
385 nm	LED385L (5 mW)	-	-	M385D1 (270 mW Min)	M385L2 (270 mW Min)	M385L2 (90 mW)^d	M385F1 (10.7 mW)	SOLIS-385C (4.0 W)^e	Available (95 mW)	-
385 nm	LED385L (5 mW)	-	-	M385D2 (1650 mW Min)	M385LP1 (1650 mW Min)	M385LP1 (520 mW)^d	M385FP1 (23.2 mW)	SOLIS-385C (4.0 W)^e	Available (95 mW)	-
395 nm	LED395L (6 mW)	-	-	M395D3 (400 mW Min)	M395L4 (400 mW Min)	-	M395F3 (6.8 mW)	-	-	-
Wavelength	Unmounted LEDs	Pigtailed LEDs	LEDs in SMT Packages	PCB- Mounted LEDs	Heatsink- Mounted LEDs	Collimated LEDs for Microscopy (Item # Prefix^a)	Fiber- Coupled LEDs^b	High-Power LEDs for Microsocopy	4-Wavelength LED Source Options^c	LED Arrays
Single Color LEDs
405 nm	LED405L (6 mW)	-	-	M405D2 (1500 mW Min)	M405L4 (1000 mW Min)	M405L3 (440 mW)^d	M405F1 (3.7 mW)	SOLIS-405C (3.9 W)^e	Available (290 mW)	-
	LED405L (6 mW)				M405L4 (1000 mW Min)	M405L4 (510 mW)^f	M405F1 (3.7 mW)
	LED405E (10 mW)				M405LP1 (1500 mW Min)	M405LP1 (450 mW)^d	M405FP1 (24.3 mW)
415 nm	-	-	-	M415D2 (1640 mW Min)	M415L4 (1310 mW Min)	-	M415F3 (21.3 mW)	-	-	-
415 nm	-	-	-	M415D2 (1640 mW Min)	M415LP1 (1640 mW Min)	-	M415F3 (21.3 mW)	-	-	-
420 nm	-	-	-	-	-	-	-	-	Available (95 mW)	-
430 nm	LED430L (8 mW)	-	-	M430D2 (490 mW Min)	M430L4 (490 mW Min)	-	-	-	-	-
445 nm	-	-	-	-	-	-	-	SOLIS-445C (5.4 W)^e	-	-
450 nm	LED450L (7 mW)	-	LEDS450 (250 mW)	M450D3 (1850 mW Min)	M450LP1 (1850 mW Min)	-	-	-	-	-
455 nm	-	-	-	M455D2 (900 mW Min)	M455L3 (900 mW Min)	M455L3 (360 mW)^d	M455F1 (11.0 mW)	-	Available (310 mW)	-
465 nm	LED465E (20 mW)	-	-	-	-	-	-	-	-	-
470 nm	LED470L (170 mW)	EP470S04 (18 mW Min)	-	M470D2 (650 mW Min)	M470L3 (650 mW Min)	M470L3 (250 mW)^d	M470F3 (17.2 mW)	-	Available (250 mW)	LIU470A (253 mW)
470 nm	LED470L (170 mW)	EP470S10 (100 mW Min)	-	M470D2 (650 mW Min)	M470L3 (650 mW Min)	M470L3 (250 mW)^d	M470F3 (17.2 mW)	-	Available (250 mW)	LIU470A (253 mW)
490 nm	LED490L (3 mW)	-	-	M490D3 (205 mW Min)	M490L4 (205 mW Min)	-	M490F3 (2.3 mW)	-	Available (50 mW)	-
505 nm	LED505L (4 mW)	-	-	M505D2 (400 mW Min)	M505L3 (400 mW Min)	M505L3 (150 mW)^d	M505F3 (11.7 mW)	-	Available (170 mW)	-
525 nm	LED525E (2.6 mW Max)	-	-	-	-	-	-	SOLIS-525C (2.4 W)^e	-	LIU525A (111 mW)
	LED525L (4 mW)
	LED528EHP (7 mW)
530 nm	-	-	-	M530D2 (350 mW Min)	M530L3 (350 mW Min)	M530L3 (130 mW)^d	M530F2 (6.8 mW)	-	Available (100 mW)	-
554 nm	-	-	-	MINTD3 (650 mW Min)	MINTL5 (650 mW Min)	-	MINTF4 (21 mW Min)	-	-	-
555 nm	LED555L (1 mW)	-	-	-	-	-	-	-	-	-
565 nm	-	-	-	M565D2 (880 mW Min)	M565L3 (880 mW Min)	-	M565F3 (13.5 mW)	-	Available (106 mW)	-
570 nm	LED570L (0.35 mW)	-	-	-	-	-	-	-	-	-
590 nm	LED590L (2 mW)	EP590S04 (3.5 mW Min)	-	M590D2 (160 mW Min)	M590L3 (160 mW Min)	M590L3 (60 mW)^d	M590F2 (2.73 mW)	-	Available (65 mW)	LIU590A (109 mW)
590 nm	LED591E (2 mW)	EP590S10 (18 mW Min)	-	M590D2 (160 mW Min)	M590L3 (160 mW Min)	M590L3 (60 mW)^d	M590F3 (4.6 mW)	-	Available (65 mW)	LIU590A (109 mW)
595 nm	-	-	-	M595D2 (445 mW Min)	M595L3 (445 mW Min)	-	M595F2 (8.7 mW)	-	-	-
Wavelength	Unmounted LEDs	Pigtailed LEDs	LEDs in SMT Packages	PCB- Mounted LEDs	Heatsink- Mounted LEDs	Collimated LEDs for Microscopy (Item # Prefix^a)	Fiber- Coupled LEDs^b	High-Power LEDs for Microsocopy	4-Wavelength LED Source Options^c	LED Arrays
Single Color LEDs
600 nm	LED600L (3 mW)	-	-	-	-	-	-	-	-	-
610 nm	LED610L (8 mW)	-	-	-	-	-	-	-	-	-
617 nm	-	-	-	M617D2 (600 mW Min)	M617L3 (600 mW Min)	M617L3 (230 mW)^d	M617F2 (10.2 mW)	-	Available (210 mW)	-
623 nm	-	-	-	-	-	-	-	SOLIS-623C (3.8 W)^e	-	-
625 nm	LED625L (12 mW)	-	-	M625D2 (700 mW Min)	M625L4 (700 mW Min)	M625L3 (270 mW)^d	M625F1 (13.2 mW)	-	Available (240 mW)	-
625 nm	LED625L (12 mW)	-	-	M625D2 (700 mW Min)	M625L4 (700 mW Min)	M625L4 (490 mW)^d	M625F1 (13.2 mW)	-	Available (240 mW)	-
630 nm	LED630L (16 mW)	-	-	-	-	-	-	-	-	LIU630A (208 mW)
635 nm	LED631E (4 mW)	-	-	-	-	-	-	-	-	-
635 nm	LED635L (170 mW)	-	-	-	-	-	-	-	-	-
639 nm	LED630E (7.2 mW)	-	-	-	-	-	-	-	-	-
645 nm	LED645L (16 mW)	-	-	-	-	-	-	-	-	-
660 nm	LED660L (13 mW)	-	-	M660D2 (940 mW Min)	M660L4 (940 mW Min)	M660L4 (400 mW)^d	M660F1 (14.5 mW)	-	Available (210 mW)	-
670 nm	LED670L (12 mW)	-	-	-	-	-	-	-	-	-
680 nm	LED680L (8 mW)	-	-	M680D2 (180 mW Min)	M680L4 (180 mW Min)	-	M680F3 (2.7 mW)	-	-	-
700 nm	-	EP700S04 (5 mW Min)	-	M700D2 (80 mW Min)	M700L4 (80 mW Min)	-	M700F3 (1.7 mW)	-	-	-
700 nm	-	EP700S10 (30 mW Min)	-	M700D2 (80 mW Min)	M700L4 (80 mW Min)	-	M700F3 (1.7 mW)	-	-	-
730 nm	-	-	-	-	M730L4 (515 mW Min)	M730L4 (165 mW)^d	-	-	-	-
740 nm	-	-	-	-	-	-	M740F2 (6.0 mW)	-	-	-
750 nm	LED750L (18 mW)	-	-	-	-	-	-	-	-	-
760 nm	LED760L (24 mW)	-	-	-	-	-	-	-	-	-
770 nm	LED770L (22 mW)	-	-	-	-	-	-	-	-	-
780 nm	LED780E (18 mW)	-	-	M780D2 (200 mW Min)	M780L3 (200 mW Min)	M780L3 (130 mW)^d	M780F2(7.5 mW)	-	-	LIU780A (315 mW)
780 nm	LED780L (22 mW)	-	-	M780D3 (800 mW Min)	M780LP1 (800 mW Min)	M780L3 (130 mW)^d	M780F2(7.5 mW)	-	-	LIU780A (315 mW)
800 nm	LED800L (20 mW)	-	-	-	-	-	-	-	-	-
810 nm	LED810L (22 mW)	EP810S04 (16 mW)	-	M810D2 (325 mW Min)	M810L3 (325 mW Min)	M810L3 (210 mW)^d	M810F2 (6.5 mW)	-	-	-
810 nm	LED810L (22 mW)	EP810S10 (90 mW)	-	M810D2 (325 mW Min)	M810L3 (325 mW Min)	M810L3 (210 mW)^d	M810F2 (6.5 mW)	-	-	-
830 nm	LED830L (22 mW)	-	-	-	-	-	-	-	-	-
840 nm	LED840L (22 mW)	-	-	-	-	-	-	-	-	-
850 nm	LED851W (8 mW)	-	-	M850D2 (900 mW Min)	M850L3 (900 mW Min)	M850L3 (330 mW)^d	M850F2 (13.4 mW)	SOLIS-850C (2.7 W)^e	-	LIU850A (322 mW)
850 nm	LED851L (13 mW)	-	-	M850D3 (1400 mW)	M850LP1 (1400 mW Min)	M850L3 (330 mW)^d	M850F2 (13.4 mW)	SOLIS-850C (2.7 W)^e	-	LIU850A (322 mW)
870 nm	LED870E (22 mW)	-	-	-	-	-	-	-	-	-
870 nm	LED870L (24 mW)	-	-	-	-	-	-	-	-	-
880 nm	-	-	-	M880D2 (300 mW Min)	M880L3 (300 mW Min)	-	M880F2 (3.4 mW)	-	-	-
890 nm	LED890L (12 mW)	-	-	-	-	-	-	-	-	-
910 nm	LED910L (10 mW)	-	-	-	-	-	-	-	-	-
910 nm	LED910E (12 mW)	-	-	-	-	-	-	-	-	-
930 nm	LED930L (15 mW)	-	-	-	-	-	-	-	-	-
940 nm	LED940E (18 mW)	-	-	M940D2 (800 mW Min)	M940L3 (800 mW Min)	M940L3 (320 mW)^d	M940F1 (6.5 mW)	-	-	-
940 nm	LED940E (18 mW)	-	-	M940D2 (800 mW Min)	M940L3 (800 mW Min)	M940L3 (320 mW)^d	M940F3 (14.2 mW)	-	-	-
970 nm	LED970L (5 mW)	-	-	M970D3 (600 mW Min)	M970L4 (600 mW Min)	-	M970F3 (8.1 mW)	-	-	-
Wavelength	Unmounted LEDs	Pigtailed LEDs	LEDs in SMT Packages	PCB- Mounted LEDs	Heatsink- Mounted LEDs	Collimated LEDs for Microscopy (Item # Prefix^a)	Fiber- Coupled LEDs^b	High-Power LEDs for Microsocopy	4-Wavelength LED Source Options^c	LED Arrays
Single Color LEDs
1050 nm	LED1050E (2.5 mW)	-	-	M1050D1 (50 mW Min)	M1050L2 (50 mW Min)	-	M1050F1 (1.4 mW)	-	-	-
1050 nm	LED1050L (4 mW)	-	-	M1050D3 (160 mW Min)	M1050L4 (160 mW Min)	-	M1050F3 (3 mW)	-	-	-
1070 nm	LED1070L (4 mW)	-	-	-	-	-	-	-	-	-
1070 nm	LED1070E (7.5 mW)	-	-	-	-	-	-	-	-	-
1085 nm	LED1085L (5 mW)	-	-	-	-	-	-	-	-	-
1200 nm	LED1200E (2.5 mW)	-	-	M1200D2 (30 mW Min)	M1200L3 (30 mW Min)	-	-	-	-	-
1200 nm	LED1200L (5 mW)	-	-	M1200D2 (30 mW Min)	M1200L3 (30 mW Min)	-	-	-	-	-
1300 nm	LED1300E (2 mW)	-	-	M1300D2 (25 mW Min)	M1300L3 (25 mW Min)	-	-	-	-	-
1300 nm	LED1300L (3.5 mW)	-	-	M1300D2 (25 mW Min)	M1300L3 (25 mW Min)	-	-	-	-	-
1450 nm	LED1450E (2 mW)	-	-	M1450D2 (31 mW Min)	M1450L3 (31 mW Min)	-	-	-	-	-
1450 nm	LED1450L (5 mW)	-	-	M1450D2 (31 mW Min)	M1450L3 (31 mW Min)	-	-	-	-	-
1550 nm	LED1550E (2 mW)	-	-	M1550D2 (31 mW Min)	M1550L3 (31 mW Min)	-	-	-	-	-
1550 nm	LED1550L (4 mW)	-	-	M1550D2 (31 mW Min)	M1550L3 (31 mW Min)	-	-	-	-	-
1600 nm	LED1600L (2 mW)	-	-	-	-	-	-	-	-	-
1650 nm	LED1600P (1.2 mW)	-	-	M1650D2 (13 mW)	M1650L4 (13 mW)	-	-	-	-	-
1750 nm	LED1700P (1.2 mW Quasi-CW, 30 mW Pulsed)	-	-	-	-	-	-	-	-	-
1850 nm	LED1800P (0.9 mW Quasi-CW, 20 mW Pulsed)	-	-	-	-	-	-	-	-	-
1950 nm	LED1900P (1.0 mW Quasi-CW, 25 mW Pulsed)	-	-	-	-	-	-	-	-	-
2050 nm	LED2050P (1.1 mW Quasi-CW, 28 mW Pulsed)	-	-	-	-	-	-	-	-	-
2350 nm	LED2350P (0.8 mW Quasi-CW, 16 mW Pulsed)	-	-	-	-	-	-	-	-	-
4200 nm	LED4300P (0.01 mW Quasi-CW, 0.2 mW Pulsed)	-	-	-	-	-	-	-	-	-
4500 nm	LED4600P (0.006 mW Quasi-CW, 0.12 mW Pulsed)	-	-	-	-	-	-	-	-	-
Wavelength	Unmounted LEDs	Pigtailed LEDs	LEDs in SMT Packages	PCB- Mounted LEDs	Heatsink- Mounted LEDs	Collimated LEDs for Microscopy (Item # Prefix^a)	Fiber- Coupled LEDs^b	High-Power LEDs for Microsocopy	4-Wavelength LED Source Options^c	LED Arrays
Multi-Color, Broadband, and White LEDs
455 nm (12.5%^g) and 640 nm	-	-	-	MPRP1D2 (275 mW Min)	MPRP1L4 (275 mW Min)	-	-	-	-	-
572 nm and 625 nm	LEDGR (0.09 mW and 0.19 mW)	-	-	-	-	-	-	-	-	-
588 nm and 617 nm	LEDRY (0.09 mW and 0.19 mW)	-	-	-	-	-	-	-	-	-
467.5 nm, 525 nm, and 627.5 nm	LEDRGBE (5.8 mW, 6.2 mW, and 3.1 mW)	-	-	-	-	-	-	-	-	-
430 - 660 nm (White)	LEDWE-15 (13 mW)	-	-	-	-	-	-	-	-	-
	LEDW7E (15.0 mW)
	LEDW25E (15.0 mW)
470 - 850 nm (Broadband)	-	-	-	MBB1D1 (70 mW Min)	MBB1L3 (70 mW Min)	-	MBB1F1 (1.2 mW)	-	-	-
6500 K (Cold White)	-	-	-	MCWHD2 (800 mW Min)	MCWHL5 (800 mW Min)	MCWHL5 (320 mW)^d	-	SOLIS-1C (3.3 W)^e	-	-
6500 K (Cold White)	-	-	-	MCWHD3 (2350 mW Min)	MCWHLP1 (2350 mW Min)	MCWHL5 (320 mW)^d	-	SOLIS-1C (3.3 W)^e	-	-
6200 K (Cold White)	-	-	-	-	-	-	MCWHF2 (21.5 mW)	-	-	-
5000 K (Cold White)	-	-	LEDSW50 (110 mW)	-	-	-	-	-	-	-
4600 - 9000 K (Cold White)	-	-	-	-	-	-	-	-	-	LIUCWHA (250 mW)
4000 K (Warm White	-	-	LEDSW40 (115 mW)	-	-	-	MWWHF2 (16.3 mW)	-	-	-
3000 K (Warm White)	-	-	LEDSW30 (100 mW)	MWWHD3 (2000 mW Min)	MWWHL4 (570 mW Min)	-	-	SOLIS-2C (3.2 W)^e	-	-
3000 K (Warm White)	-	-	LEDSW30 (100 mW)	MWWHD3 (2000 mW Min)	MWWHLP1 (2000 mW Min)	-	-	SOLIS-2C (3.2 W)^e	-	-
5700 K (Day Light White)	-	-	-	-	-	-	-	SOLIS-3C (3.5 W)	-	-

These Collimated LEDs are compatible with the standard and epi-illumination ports on the following microscopes: Olympus BX/IX (Item # Suffix: -C1), Leica DMI (Item # Suffix: -C2), Zeiss Axioskop (Item # Suffix: -C4), and Nikon Eclipse (Bayonet Mount, Item # Suffix: -C5).
Typical power when used with MM Fiber with Ø400 µm core, 0.39 NA.
Our LED4D 4-Wavelength LED Source is available with select combinations of the LEDs at these wavelengths.
Typical power for LEDs with the Leica DMI collimation package (Item # Suffix: -C2).
Minimum power for the collimated output of these LEDs. The collimation lens is installed with each LED.
Typical power for LEDs with the Olympus BX and IX collimation package (Item # Suffix: -C1).
Percentage of LED intensity that emits in the blue portion of the spectrum, from 400 nm to 525 nm.