THORLABS M780L3-C1 Operating Instructions

Description

Thorlabs' M780L3-C Collimated LEDs consist of the M780L3 mounted LED and a lamphouse-port-
compatible housing that contains an aspheric collimation optic. The LED has a nominal wavelength
of 780 nm and is mounted to the end of a heat sink equipped with internal SM1 (1.035"-40) threads.
The M780L3-C LEDs need to be supplied with a constant current that must not exceed 800 mA. The
current source must be able to deliver this current at a forward voltage of 2.0 V. For the total
power output of each available version, please see the Specifications table below.

Specifications

Color
a
Nominal Wavelength
Bandwidth (FWHM)
Maximum Current (CW)
Forward Voltage
Electrical Power (Max)
Emitter Size
Typical Lifetime
Operating Temperature (Non-Condensing)
Storage Temperature
b
Risk Group
a. Value is approximate.
b. According to the standard IEC 62471:2006, Photobiological Safety of Lamps and Lamp Systems
Item #
a,b
Total Beam Power
a
Beam Diameter
Compatible Microscopes
a. Values are approximate.
b. Measured at Maximum Current.
Operating Instructions
Be sure to provide air ventilation in order to avoid overheating, drops in optical power, and
reduced lifetime. Each LED has a characteristic switch-on behavior, which depends on the LED
properties and environment conditions. An important criterion is the heat dissipation. The M780L3-
C LEDs have a unique thermal design that reduces the power decay to a minimum.
The image below shows the M780L3-C's male connector, which is a standard M8x1 sensor circular
connector. Pins 1 and 2 connect to the LED. Pins 3 and 4 are used for the internal EEPROM. Only
use these connections when using a Thorlabs LED driver.
After an LED is switched on, it will warm up which can cause the optical power to decay. The heat
sink of the M780L3-C provides good thermal management, reducing the loss of power as the LED
reaches its equilibrium temperature.
M780L3‐C1
Common Specifications
M780L3-C1 M780L3-C2
210 mW 130 mW
50 mm 37 mm
Olympus BX and IX Leica DMI
Collimated LEDs, 780 nm
M780L3‐C2
IR
780 nm
28 nm
800 mA
2.0 V
1600 mW
1 mm x 1 mm
>10 000 h
0 to 40 °C
-40 to 70 °C
RG1 – Low Risk Group
M780L3-C4
180 mW
44 mm
Zeiss Axioskop
M780L3‐C4
M780L3‐C5
M780L3-C5
170 mW
43 mm
Nikon Eclipse
December 8, 2015
MTN003654‐S01, Rev B