Item # Prefix	Color (Click for Spectrum)^a	Nominal Wavelength^a,b	Min LED Power Output^a,c
M365L2	UV	365 nm	190 mW
M385L2	UV	385 nm	270 mW
M405L2	UV	405 nm	410 mW
M455L2	Royal Blue	455 nm	900 mW
M470L2	Blue	470 nm	830 mW
M505L2	Cyan	505 nm	335 mW
M530L2	Green	530 nm	220 mW
M590L2	Amber	590 nm	150 mW
M617L2	Orange	617 nm	390 mW
M625L3	Red	625 nm	700 mW
M660L3	Deep Red	660 nm	640 mW
M735L3	Far Red	735 nm	260 mW
M780L2	IR	780 nm	160 mW
M850L3	IR	850 nm	900 mW
M940L2	IR	940 nm	320 mW
MCWHL2	Cold White	6500 K^d	650 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 center wavelength specs are only intended to be used as a guideline. Click here to download spectrum data.
The nominal wavelength indicates the wavelength at which the LED appears brightest to the human eye. This may not correspond to the peak wavelength as measured by a spectrograph.
For the bare LED. The total beam power of the LED will be lower due to facturs such as the viewing angle of the LED.
Correlated color temperature.

Features

Illumination Source for Microscope Epi-Illumination Ports, Projectors, and Custom Imaging Systems
Optimized Thermal Management Provides Output Intensity Stability
Adjustable Aspheric Collimation Optic with Low f/# (Approximately 0.8)
Integrated Identification Chip (EEPROM) Stores LED Operating Parameters
4-Pin Female Mating Connector for Custom Power Supplies can be Purchased Separately
Custom Housings Available - Contact Tech Support for Details

Thorlabs' collimated LED assemblies can be easily connected to standard and epi-illumination ports on most readily available commercial microscopes, including Leica, Olympus, Nikon, and Zeiss. Each collimated LED consists of a high-power mounted LED and a lamphouse-port-compatible housing that contains an AR-coated aspheric collimation optic (see the Specs tab for details). The collimation of the beam can be adjusted by changing the postition of the aspheric lens with respect to the LED. Interchanging LEDs is easy; simply unscrew one LED from the housing and replace it with a different mounted LED (purchased separately). If the wavelength you require is not sold on this page, our mounted high-power LEDs are available in additional wavelengths. We also offer collimation packages which can be purchased separately from these LEDs, including a collimation adapter for the Nikon Eclipse Ti.

Like our high-power mounted LEDs, the package of these collimated LEDs is in direct contact with the heat sink to provide excellent thermal management. This minimizes the degradation of optical output power caused by increased LED temperatures. Please see the Stability tab for information on the stable output intensity of these collimated LEDs.

Information concerning compatible controllers is provided on the LED Drivers tab. If the LED is driven with a DC2100, DC4100, and DC4104 controller, the integrated EEPROM chip will identify the LED and allow the controller to automatically set the proper current limits in order to protect the LED from being overdriven. The DC4100 and the DC4104 require the DC4100-HUB when used with these LEDs.

LED Specifications

Item # Prefix	Nominal Wavelength^a	Color (Click for Spectrum)^a,b	Min LED Power^a,c	Typ. LED Power^a,c	Max Drive Current (CW)	Typical Lifetime	Included Collimation Lens
M365L2	365 nm	UV	190 mW	360 mW	700 mA	>10,000 h	ACL5040-A
M385L2	385 nm	UV	270 mW	430 mW	700 mA	>10,000 h	ACL5040-A
M405L2	405 nm	UV	410 mW	760 mW	1000 mA	100,000 h	ACL5040-A
M455L2	455 nm	Royal Blue	900 mW	1020 mW	1600 mA	>50,000 h	ACL5040-A
M470L2	470 nm	Blue	830 mW	950 mW	1600 mA	>50,000 h	ACL5040-A
M505L2	505 nm	Cyan	420 mW	420 mW	1000 mA	100,000 h	ACL5040-A
M530L2	530 nm	Green	220 mW	400 mW	1600 mA	>50,000 h	ACL5040-A
M590L2	590 nm	Amber	150 mW	190 mW	1600 mA	>50,000 h	ACL5040-A
M617L2	617 nm	Orange	390 mW	570 mW	1600 mA	>50,000 h	ACL5040-A
M625L3	625 nm	Red	700 mW	770 mW	1000 mA	100,000 h	ACL5040-A
M660L3	660 nm	Deep Red	640 mW	700 mW	1200 mA	>65,000 h	ACL5040-A
M735L3	735 nm	Far Red	260 mW	310 mW	1200 mA	>65,000 h	ACL5040-B
M780L2	780 nm	IR	160 mW	420 mW	1000 mA	>10,000 h	ACL5040-B
M850L3	850 nm	IR	900 mW	1100 mW	1000 mA	100,000 h	ACL5040-B
M940L2	940 nm	IR	320 mW	460 mW	1000 mA	100,000 h	ACL5040-B
MCWHL2^d	6500 K^e	Cold White	650 mW	700 mW	1600 mA	>50,000 h	ACL5040-A

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 center wavelength specs are only intended to be used as a guideline. Click here to download spectrum data.
The nominal wavelength indicates the wavelength at which the LED appears brightest to the human eye. This may not correspond to the peak wavelength as measured by a spectrograph.
For the bare LED. See the table below for total beam power with the collimation package.
The MCWHL2-C LEDs may not turn off completely when modulated at frequencies above 5 kHz, as the white light is produced by optically stimulating emission from phosphor.
Correlated color temperature. The wavelength range corresponding to >10% power is approximately 435 - 675 nm.

Specifications for LED with Collimating Microscope Adapter Attached

Item # Suffix	-C1	-C2	-C3	-C4
Compatible Microscope^a	Olympus BX and IX	Leica DMI	Nikon Eclipse (Bayonet Mount)	Zeiss Axioskop
Beam Diameter^b,c	50 mm	37 mm	43 mm	44 mm
Beam Area^b	1960 mm²	1080 mm²	1960 mm²	1520 mm²
Item # Prefix	Total Beam Power^b
M365L2	120 mW	60 mW	80 mW	80 mW
M385L2	170 mW	90 mW	120 mW	110 mW
M405L2	440 mW	260 mW	360 mW	360 mW
M455L2	410 mW	210 mW	300 mW	310 mW
M470L2	400 mW	210 mW	300 mW	310 mW
M505L2	170 mW	70 mW	100 mW	100 mW
M530L2	170 mW	90 mW	130 mW	130 mW
M590L2	70 mW	40 mW	50 mW	60 mW
M617L2	240 mW	130 mW	170 mW	190 mW
M625L3	380 mW	270 mW	300 mW	330 mW
M660L3	600 mW	370 mW	410 mW	420 mW
M735L3	160 mW	100 mW	130 mW	140 mW
M780L2	220 mW	130 mW	170 mW	200 mW
M850L3	480 mW	330 mW	370 mW	400 mW
M940L2	200 mW	120 mW	160 mW	180 mW
MCWHL2	290 mW	150 mW	210 mW	220 mW

Standard or Epi-Illumination Port Required.
Due to variations in the manufacturing process and operating parameters such as temperature and current, the total beam power, beam diameter, and beam area of any given LED will vary.
At the output aperture of the collimation package.

Click to Enlarge

Optimized Thermal Management

The thermal dissipation performance of these collimated 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 right).

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

Pin Out

Pin Connection - Male

The diagram to the right shows the male connector of the collimated 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	DC2100^a	DC4100^{a, b, c}	DC4104^{a, b, c}
Click Photos to Enlarge
Max LED Driver Current Output	1.2 A	2.0 A	1.0 A per Channel	1.0 A per Channel
Max Modulation Frequency Using External Input	5 kHz	100 kHz^d	100 kHz^d (Simultaneous Across all Channels)	100 kHz^d (Independently Controlled Channels)
Interface	Analog	USB 2.0	USB 2.0	USB 2.0
Main Driver Features	Very Compact Footprint 60 mm x 73 mm x 104 mm (W x H x D)	Individual Pulse Width Control	4 Channels^c	4 Channels^c
EEPROM Compatible: Reads Out LED Data for LED Settings	-	x	x	x
LCD Display	-	x	x	x

Automatically limits to LEDs max current via EEPROM readout.
LED sources with a forward voltage of greater than 5 V are not compatible with DC4100 or DC4104.
The DC4100 or 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.
The MCWHL2-C LEDs may not turn off completely when modulated at frequencies above 5 kHz, as the white light is produced by optically stimulating emission from phosphor.

Note: The LEDs on this page are not compatible with the DC3100 driver sold with our Modulated LEDs for FLIM Microscopy kits.

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Posted Comments:

Poster: B.Povazay

Posted Date: 2013-03-12 19:54:38.977

Is it possible to mount collimated LEDs in a standard SM1-mount?

Poster: tcohen

Posted Date: 2013-03-14 13:37:00.0

Response from Tim at Thorlabs: The back end of these have 1.2” diameters and can be used with an SM1RC slip ring. The beam diameters produced by these larger focal length lenses would overfill an SM1 thread. If you are looking to confine it to this size an alternative would be to use the mounted LED without the collimating optic, (this is the M***L2 series and can be purchased separately) and then use a 1” diameter lens with an adjustable length lens tube for alignment. We have a typical setup to this end on our “Application” tab on the M***L2 series page.

Poster: jvigroux

Posted Date: 2012-10-22 08:48:00.0

A response form Julien at Thorlabs: Thank you for your inquiry! As far as I know, DIC usually uses polarized light sources. If this is the cas ein your setup, the LEd would not work because of the light being unpolarized. The use of an extra polarizer after the LED would imply a strong power reduction as well as a relatively high instability of the output power. I will contact you directly to discuss the details of your setup in order to see which light source could be used.

Poster: nrbabuwp

Posted Date: 2012-10-18 18:45:29.41

Hi, We are interested in buying an LED to replace the lamp of DIC to use it in multicolor imaging. Wavelength range we are looking for is between 670 and 750nm. Can you suggest if 260mW of 735nm LED is good enough for DIC imaging? Has anyone used it for DIC? Babu

Poster: jvigroux

Posted Date: 2012-01-23 10:33:00.0

A response from Julien at Thorlabs: Thank you for your feedback! the suggested adapters are by no mean the only solution and based on the details of your setup, some other configuration might indeed improve the power density or the homogeneity. I will contact you directly to discuss the details and see which solution would be the most adapted.

Poster: jvigroux

Posted Date: 2012-01-23 10:30:00.0

Poster: g.raffy

Posted Date: 2012-01-23 09:12:12.0

A collimated beam with 50mm diameter will be clipped by the back aperture of the objective in an IX microscope (~10mm), loosing most of the available power of the LED. Am I wrong? Why not proposing an alternative lens that lets all the light entering the objective? I really need all the power... Ideally, if the lens to LED distance is settable, then one could choose between power density and uniformity of illumination.

Poster: bdada

Posted Date: 2011-09-21 14:55:00.0

Response from Buki at Thorlabs: Thank you for your interest in our MCWHL2-C1 and for taking the time to use our feedback tool! These mounts are designed to fit on the standard and epi-illumination ports for Olympus BX and IX microscopes. The exact compatibility will depend on whether the transmitted lamp housing on your desired Olympus microscope has the same port-style as the BX and IX. Please contact TechSupport@thorlabs.com if you have further inquiries.

Poster: mzlin

Posted Date: 2011-09-02 12:01:15.0

Can anyone verify that the Olympus mounts will fit in place of the transmitted lamp housing too (i.e. the same mount will work for transmitted as for fluorescence)? We have not gotten our scope yet so cant measure ourselves. Thanks.

Poster: klee

Posted Date: 2009-10-05 16:12:24.0

A response from Ken at Thorlabs: Our new DC2100 is also plug and play compatible with these LED light sources.

Poster: acable

Posted Date: 2009-10-03 15:47:55.0

Is the LEDD1 driver the only driver you offer that is plug and play compatible.

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