Cage-Compatible Diffuse Backlight LEDs

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Figure 1.1  The CFS1(/M) Sliding Filter Mount can be used with the Cage-Compatible LED Backlights to filter specific wavelength ranges of the output.

Features

• Bright Diffuse Illuminators Ideal for Machine Vision Applications
• 7 Central Wavelengths from 455 nm to 850 nm, 2 Broadband White Options Available
• Ø25 mm Diffused Aperture Size
• >10 000 Hour Lifetime
• Compatible with Our 30 mm Cage System  
• Low-Profile Housing
• Integrated Memory (EEPROM) Stores LED Operating Parameters
• Integrated M8 Connector for use with Thorlabs' LED Drivers

Thorlabs' Cage-Compatible Diffuse Backlight LEDs are bright LEDs that provides stable, uniform illumination. By integrating a Ø25 mm diffuse window, these LED backlights produce a flatter field of illumination as compared to a point source, making them ideal for machine vision applications. Seven different central wavelengths between 455 nm and 850 nm, as well as two different white, broadband outputs are available.

Constructed from anodized aluminum, these LED housings feature four through holes that are compatible with our Ø6 mm ER cage rods. This allows for integration with our 30 mm cage systems and DIY Cerna components, such as the CSA1001 Fixed Arm. Each cage rod through hole is accompanied by two side-located locking setscrews, which can be secured using a 5/64" (2.0 mm) hex key or balldriver. Figures 1.1 and 1.2 show two different example setups utilizing this compatibility.

To ensure proper operation and to maximize operating lifetime, the infrared (IR) and white light LED backlights must be mounted onto an appropriate heat sink for applications requiring high current; the housing includes four counterbored slots that accept 1/4" (M6) cap screws (not included) for compatibility with both imperial and metric hole patterns. For convenient connection to the drivers listed on the LED Drivers tab, these LED backlights have a connection cable with an M8 connector; see the Pin Diagrams tab for the M8 connector pin information.

These LED backlights feature an EEPROM chip which stores information about the LED (e.g., current limit, forward voltage). When controlled by a Thorlabs DC2200, DC4100, DC4104, UPLED, or DC40 LED driver, the data can be used to implement smart safety features.

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View Imperial Product List

Item #	Qty	Description
Base
MB624	1	Aluminum Breadboard 6" x 24" x 1/2", 1/4"-20 Taps
XR25DR3	1	3" Dovetail Rail, 500 mm Long
Sample Area
XR25P	1	25 mm Travel Linear Translation Stage, Side-Mounted Micrometer, 1/4"-20 Taps
LJ750	1	Ø2.64" Compact Lab Jack, 1.00" Vertical Travel, 200 lbs Load Capacity, Imperial
Imaging End
XR25-A2	1	Parallel Mounting Adapter with Male 3" Dovetail and Female 3" Dovetail
XR25P	1	25 mm Travel Linear Translation Stage, Side-Mounted Micrometer, 1/4"-20 Taps
MVBT2324	1	0.243X Bi-Telecentric C-Mount Camera Lens for Sensor Formats up to 2/3"
CS505MU	1	Kiralux 5.0 MP Monochrome CMOS Camera, 53.2 fps Max, USB 3.0 Interface
SH25S050	1	1/4"-20 Stainless Steel Cap Screw, 1/2" Long, 25 Pack
MVBTC25	1	Mounting Clamp for the MVBT2324 0.243X Bi-Telecentric Lens, Imperial
Illumination End
XR25-RP1	1	Rail Plate for 3" Dovetail Rails, 1/4"-20 Taps
RS7M	1	Ø25.0 mm Post Spacer, Thickness = 7 mm
MVBT2324	1	0.243X Bi-Telecentric C-Mount Camera Lens for Sensor Formats up to 2/3"
MVBTC25	1	Mounting Clamp for the MVBT2324 0.243X Bi-Telecentric Lens, Imperial
LEDBW1	1	6500 K, 251 mW (Min) 30 mm Cage-Compatible Diffuse Backlight LED, 2000 mA
CP33T	1	SM1-Threaded 30 mm Cage Plate, 0.50" Thick, 2 Retaining Rings, 8-32 Tap
ER4	4	Cage Assembly Rod, 4" Long, Ø6 mm
SM1A10Z	1	Adapter with External SM1 Threads and Internal C-Mount Threads, 9.1 mm Spacer
SM1L30	1	SM1 Lens Tube, 3.00" Thread Depth, One Retaining Ring Included
W25S050	1	1/4" Washer, M6 Compatible, Stainless Steel, 100 Pack
SH25S075	1	1/4"-20 Stainless Steel Cap Screw, 3/4" Long, 25 Pack
LEDD1B	1	T-Cube LED Driver, 1200 mA Max Drive Current (Power Supply Not Included)
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View Metric Product List

Item #	Qty	Description
Base
MB1560/M	1	Aluminum Breadboard, 150 mm x 600 mm x 12.7 mm, M6 Taps
XR25DR3	1	3" Dovetail Rail, 500 mm Long
Sample Area
XR25P/M	1	25 mm Travel Linear Translation Stage, Side-Mounted Micrometer, M6 x 1.0 Taps
LJ750/M	1	Ø2.64" Compact Lab Jack, 1" Vertical Travel, 200 lbs Load Capacity, Metric
Imaging End
XR25-A2	1	Parallel Mounting Adapter with Male 3" Dovetail and Female 3" Dovetail
XR25P/M	1	25 mm Travel Linear Translation Stage, Side-Mounted Micrometer, M6 x 1.0 Taps
MVBT2324	1	0.243X Bi-Telecentric C-Mount Camera Lens for Sensor Formats up to 2/3"
CS505MU	1	Kiralux 5.0 MP Monochrome CMOS Camera, 53.2 fps Max, USB 3.0 Interface
SH6MS12	1	M6 x 1.0 Stainless Steel Cap Screw, 12 mm Long, 25 Pack
MVBTC25/M	1	Mounting Clamp for the MVBT2324 0.243X Bi-Telecentric Lens, Metric
Illumination End
XR25-RP1/M	1	Rail Plate for 3" Dovetail Rails, M6 x 1.0 Taps
RS7M	2	Ø25.0 mm Post Spacer, Thickness = 7 mm
MVBT2324	1	0.243X Bi-Telecentric C-Mount Camera Lens for Sensor Formats up to 2/3"
MVBTC25/M	1	Mounting Clamp for the MVBT2324 0.243X Bi-Telecentric Lens, Metric
LEDBW1	1	6500 K, 251 mW (Min) 30 mm Cage-Compatible Diffuse Backlight LED, 2000 mA
CP33T/M	1	SM1-Threaded 30 mm Cage Plate, 0.50" Thick, 2 Retaining Rings, M4 Tap
ER4	4	Cage Assembly Rod, 4" Long, Ø6 mm
SM1A10Z	1	Adapter with External SM1 Threads and Internal C-Mount Threads, 9.1 mm Spacer
SM1L30	1	SM1 Lens Tube, 3.00" Thread Depth, One Retaining Ring Included
W25S050	1	1/4" Washer, M6 Compatible, Stainless Steel, 100 Pack
SH6MS20	1	M6 x 1.0 Stainless Steel Cap Screw, 20 mm Long, 25 Pack
LEDD1B	1	T-Cube LED Driver, 1200 mA Max Drive Current (Power Supply Not Included)
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Figure 1.2  Two MVBT2324 0.243x Bi-Telecentric Lenses are mounted with MVBTC25/M 0.243x Bi-Telecentric Lens Clamps in an inspection system. This setup can be used for imaging samples, such as the screws pictured here. An LEDBW1 Backlight provides illumination for the system.

White Light LEDs
Thorlabs offers two illuminators with white LEDs featuring broad spectra that span several hundred nanometers; see Table G1.1 for a typical output spectrum of each device. Our broadband white options have correlated color temperatures of 4900 K (neutral white) or 6500 K (cold white), which indicate that the color appearance is similar to a black body radiator at the same temperature. In general, a cold white LED has a stronger blue component to the spectrum than a warm white or neutral white LED. Compared to warm white LEDs, cold white LEDs are more suitable for fluorescence microscopy applications or use with cameras with white balancing due to their higher intensity at most wavelengths. To discuss LED backlights with other correlated color temperatures or nominal wavelengths, please contact Tech Sales.

Driver Options
Thorlabs offers six drivers compatible with these LED backlights: DC2200, UPLED, DC40, LEDD1B, DC4100, and DC4104 (the latter two require the DC4100-HUB). See the LED Drivers tab for compatibility information and a list of specifications. For applications that require the full power of these LEDs, it is important to select a driver that can provide the maximum current and forward voltage of that diode. For example, the LEDBW1 LED has a higher maximum current rating than the UPLED, LEDD1B, DC4100, and DC4101 drivers are able to provide, which will limit the achievable LED output power when used with these drivers; we recommend using the DC2200 or DC40 in this case. In addition, the DC2200, DC4100, DC4104, DC40, and UPLED 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 these LED backlights are not intended for use in household illumination applications.

Thorlabs also offers a range of unmounted, mounted, collimated, and fiber-coupled LEDs that are designed for a variety of applications, including microscopy, illumination, and measurements. For questions on choosing an appropriate LED and to discuss mounting requirements, please contact Tech Sales.

Figure 2.1  Pin Diagram

Pin Connection - Male

The diagram in Figure 2.1 shows the male connector of the Cage-Compatible LED Backlights. 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. 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.

To fully support the max optical power of the LED you intend to drive, ensure that the max voltage and max current of the driver are equal to or greater than those of the LED.

Compatible Drivers	LEDD1B	UPLEDa	DC40a	DC2200a	DC4100a,b	DC4104a,b
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LED Driver Current Output (Max)c	1.2 A	1.2 A	4.0 Ad	LED1 Terminal: 10.0 A LED2 Terminal: 2.0 Ae	1.0 A per Channel	1.0 A per Channel
LED Driver Forward Voltage (Max)f	12 V	8 V	14.0 Vd	50 V	5 V	5 V
Modulation Frequency Using External Input (Max)	5 kHz	-	5 kHz	250 kHzg,h	100 kHzh (Simultaneous Across all Channels)	100 kHzh (Independently Controlled Channels)
External Control Interface(s)	Analog (BNC)	USB 2.0	USB 2.0, TTL, and 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)	USB-Controlled	Driver Current Up to 4.0 A, Manual and USB-Controlled	Touchscreen Interface with Internal and External Options for Pulsed and Modulated LED Operation	4 Channelsb	4 Channelsb
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 LEDBW1 requires the DC4100-HUB when used with the DC4104 driver.
• LEDs with maximum current ratings higher than the driver's maximum current output can be driven, but will not reach full power.
• The DC40 LED Driver is designed to automatically select the appropriate current/voltage combination for the LED on this page. Please note that the maximum current and forward voltage are interdependent; the DC40 driver cannot drive an LED with a 14.0 V forward voltage at 4.0 A. Please see the full web presentation for more information.
• The LED sold below is compatible with the LED2 Terminal.
• LEDs with forward voltage greater than the driver's maximum forward voltage cannot be driven. All drivers in this table are capable of driving the LEDBW1.
• Small Signal Bandwidth: Modulation not exceeding 20% of full scale current. The driver accepts other waveforms, but the maximum frequency will be reduced.
• The LEDBW1 produces light by stimulating emission from phosphor, which limits the modulation frequency. As a white LED, the LEDBW1 may not turn off completely when modulated above 10 kHz at duty cycles below 50%.