Mounted LED Overview

Item #	Color	Nominal Wavelength*	Min Power LED Output*	Max Current
M365L2	UV	365 nm	190 mW	700 mA
M385L2	UV	385 nm	270 mW	700 mA
M405L2	UV	405 nm	410 mW	1000 mA
M455L2	Royal Blue	455 nm	900 mW	1600 mA
M470L2	Blue	470 nm	830 mW	1600 mA
M505L1	Cyan	505 nm	420 mW	700 mA
M530L2	Green	530 nm	220 mW	1600 mA
M590L2	Amber	590 nm	150 mW	1600 mA
M617L2	Orange	617 nm	390mW	1600 mA
M625L2	Red	625 nm	440 mW	1600 mA
M660L2	Deep Red	660 nm	270 mW	1500 mA
M735L2	Far Red	735 nm	260 mW	1500 mA
M780L2	IR	780 nm	160 mW	1000 mA
M850L2	IR	850 nm	320 mW	1000 mA
M940L2	IR	940 nm	320 mW	1000 mA
MCWHL2	Cold White	6500 K	650 mW	1600 mA

* Specified by the LED vendor. These are typical values which may vary and depend on different parameters like the LED temperature.

Mounted LED Features

Optimized Thermal Properties Lead to Stable
Output Power
Internal SM1 Threading for Mounting
Integrated EEPROM Stores LED Data
Collimation Adapters Available

Collimation Adapter Features

AR-Coated Aspheric Lens with Low f#
Compatible with Selected Leica, Nikon, Olympus, and Zeiss Microscopes
Easily Adjust Beam Collimation / Focus

Each uncollimated, mounted LED consists of a single high-power LED with multiple emitters that has been mounted to the end of a heatsink (see the Stability tab). The heatsink has internal SM1 (Ø1.035"-40) threads and the same external diameter (1.20") as an SM1 lens tube, which makes it easy to integrate into most applications. The integrated EEPROM chip in each LED stores information about the LED (e.g., current limit, wavelength, and forward voltage) that can be read by Thorlabs' DC2100 and DC4100 LED Controllers. For more information about LED drivers, including the basic LEDD1B driver, see the LED Drivers tab.

Thorlabs offers three drivers, LEDD1B, DC2100, and DC4100 (requires 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 DC2100 and DC4100 can modulate the LED at a rate up to 100 kHz. In addition, the DC2100 and DC4100 drivers are capable of reading the current limit from the EEPROM chip of the connected LED and automatically adjusting the max current setting to protect the LED.

Optimized Thermal Management

These high-power mounted LEDs possess good thermal stability properties, and hence, degradation of optical output power due to increased LED temperature is not an issue. For more details, please see the Stability tab.

Collimated Optics Adapters

Collimation adapters are available that contain an AR-coated aspheric lens and are designed to mate to the epi-illumination ports on Leica DMI (COP2), Nikon Eclipse (COP3), Olympus IX/BX (COP1), and Zeiss Axioskop (COP4) microscopes. See below for more details.

Pin Connection

The diagram to the right shows the male connector of the MxxxLx mounted LED assembly. It is a standard M8x1 sensor circular connector. Pin 1 and 2 are the connection to the LED. Pin 3 and 4 are used for the internal EEPROM in the MxxxLx series. Please note that this pin connection diagram is not valid if you are using an LED driver that was not purchased from Thorlabs.

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

LED Specifications

Item #	Color	Dominant Wavelength*	Minimum Power LED Output*	Typical Power LED Output*	Maximum Current CW	Forward Voltage	Halfwidth (FWHM)	Typical Lifetime
M365L2	UV	365 nm	190 mW	360 mW	700 mA	4.4 V	7.5 nm	>10,000 h
M385L2	UV	385 nm	270 mW	430 mW	700 mA	4.3 V	10 nm	>10,000 h
M405L2	UV	405 nm	410 mW	760 mW	1000 mA	3.8 V	13 nm	100,000 h
M455L2	Royal Blue	455 nm	900 mW	1020 mW	1600 mA	3.5 V	20 nm	>50,000 h
M470L2	Blue	470 nm	830 mW	950 mW	1600 mA	3.5 V	29 nm	>50,000 h
M505L1	Cyan	505 nm	420 mW	420 mW	700 mA	6.8 V	29 nm	100,000 h
M530L2	Green	530 nm	220 mW	400 mW	1600 mA	3.5 V	31 nm	>50,000 h
M590L2	Amber	590 nm	150 mW	190 mW	1600 mA	2.5 V	14 nm	>50,000 h
M617L2	Orange	617 nm	390mW	570 mW	1600 mA	2.5 V	16 nm	>50,000 h
M625L2	Red	625 nm	440 mW	650 mW	1600 mA	2.5 V	17 nm	>50,000 h
M660L2	Deep Red	660 nm	270 mW	640 mW	1500 mA	3.0 V	17 nm	100,000 h
M735L2	Far Red	735 nm	260 mW	380 mW	1500 mA	2.5 V	37 nm	100,000 h
M780L2	IR	780 nm	160 mW	420 mW	1000 mA	2.0 V	31 nm	>10,000 h
M850L2	IR	850 nm	320 mW	450 mW	1000 mA	2.4 V	34 nm	100,000 h
M940L2	IR	940 nm	320 mW	460 mW	1000 mA	1.8 V	64 nm	100,000 h
MCWHL2	Cold White	6500 K	650 mW	700 mW	1600 mA	3.5 V	N/A	>50,000 h

* The specifications listed in the table above are nominal values specified by the LED manufacturer.

Stability of Optical Output Power

Normalized Power vs Timer after Switch On

Figure: Decrease of Optical Output Power due to Increasing LED Temperature

Optimized Thermal Management

The thermal dissipation performance of the MxxxL2-C series of mounted LEDs has been optimized. The heat sink is directly mounted to the LED mount so as to provide optimal thermal contact. By doing so, the degredation of optical output power that can be attributed to increased LED junction temperature is minimized (see the graph to the right).

Mounted LED		LED Drivers
Item #	Color	LEDD1B	DC2100 ^a	DC4100 ^{a, b, c}

M365L2	UV	x	x	x
M385L2	UV	x	x	x
M405L2	UV	x	x	x
M455L2	Royal Blue	x	x	x
M470L2	Blue	x	x	x
M505L1	Cyan	x	x	-
M530L2	Green	x	x	x
M590L2	Amber	x	x	x
M617L2	Orange	x	x	x
M625L2	Red	x	x	x
M660L2	Deep Red	x	x	x
M735L2	Far Red	x	x	x
M780L2	IR	x	x	x
M850L2	IR	x	x	x
M940L2	IR	x	x	x
MCWHL2	Cold White	x	x	x
Max. LED Driver Current Output		1.2 A Max.	2.0 A Max.	1.0 A Max.
Max Modulation Fequency Using External Input		5 kHz	100 kHz	100 kHz
Interface		Analog	USB2.0	USB2.0
Main Driver Features		Very Compact Footprint	Individual Pulse Width Control	4-Channels ^c
EEPROM Compatible: Reads Out LED Data for LED Settings		-	x	x
LCD Display		-	x	x

^a Automatically limits to LEDs max. current via EEPROM readout.
^b LED sources with a forward voltage of greater than 5V are not compatible with DC4100.
^c The DC4100 can power and control up to four LEDs simultaneously.

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Posted Comments:
Poster: mjg	Posted Date: 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.

Poster: apalmentieri	Posted Date: 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.

Poster: jrguest	Posted Date: 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.

Poster: apalmentieri	Posted Date: 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.

Poster: michael.spurr	Posted Date: 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.

Poster: apalmentieri	Posted Date: 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.

Poster: michael.spurr	Posted Date: 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.

Poster: apalmentieri	Posted Date: 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.

Poster: michael.spurr	Posted Date: 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.

Poster: klee	Posted Date: 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.

Poster: acable	Posted Date: 2009-10-03 15:43:41.0
Is this series of mounted LEDs plug and play compatible with the DC2100 driver.

Poster: javier	Posted Date: 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

Poster: booth	Posted Date: 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.

Poster: Laurie	Posted Date: 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.

Poster: atashtoush	Posted Date: 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