Thorlabs Inc.
Visit the LED Array Light Sources page for pricing and availability information

LED Array Light Sources

  • Compact, Easy to Use LED Source
  • Central Wavelengths from 470 to 850 nm
  • Broadband White Option Available

LIU470A

470 nm LED Array

AD38

Ø2" Mounting Adapter

Application Idea

LIU525B with an AD38
Ø2" Mounting Adapter
Secured in a KS2
Kinematic Mount
on a Ø1/2" Post

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OVERVIEW

Features

  • LED Array Comprised of 20 High Brightness LEDs
  • Longer Lifetime than Traditional Light Sources (up to 100,000 hours)
  • Fits Many Commercially Available Camera Illumination Units
  • Compatible with Thorlabs' 30 mm Cage System
  • LED Array Power Supply Sold Separately (See Below)

Thorlabs' LED Array Light Sources consist of 20 individual bright LEDs and are available with one of seven central wavelengths between 470 nm and 850 nm or with a broadband, cold-white output (see the graph below for the available emission spectra). Each array features a diffuser mounted over the LEDs and secured by the housing. The intensities of these LED arrays range from 1.4 mW/cm² to 4.0 mW/cm², as measured from 100 mm away along the emission axis.

Conveniently mounted in a Ø1.5" housing, these light sources can be used for a variety of lighting applications. The housing can be readily secured into most optical mounts used in camera illumination units. Additional mounting options include two threaded holes on the rear of the housing, one M4 and one 8-32 (see drawing below), as well as grooves running the length of the housing that allow the LED unit to be placed in a 30 mm cage system. The LED unit will be suspended by the cage rods but not restrained from moving along the optical axis of the cage system as shown in the photo below and to the right. To fix the position of the LED unit, clamp it between two fixed cage elements (see the Application Idea tab for more details). Thorlabs also offers a mounting adapter (Item # AD38) for these LEDs to be mounted in our Ø2" mirror mounts, such as the KS2 shown above.

These LED arrays are only compatible with the 24 V LIU-PS power supply, which must be purchased separately. The LED arrays sold on this page are not compatible with Thorlabs' LED current controllers.

Please Note: During normal operation, the temperature of the LED housing can increase by as much as 25 °C above the ambient temperature. Avoid handling the LED housing while the LED is on or shortly after it has been turned off. 

LIU LED Emission Spectra
Click to Enlarge

The drawing above shows a back view of the LIU470A LED array.
LIU LED Emission Spectra
Click to Enlarge

Click Here to Download Raw Data
The plot above shows the spectra for all of the LEDs on this page, measured using our CCS200 compact spectrometer.
LIU App ShotClick to Enlarge
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The photo above shows an LED array in a 30 mm cage system. When pushed together, the two cage plates clamp the LED array in place.

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PIN DIAGRAM

Pin Diagram for LED Arrays

PinSpecificationWire Color on PAA630 Cable
124 VDCBrown
2GroundWhite
3Not ConnectedBlue
4Not ConnectedBlack
plug

Please Note: The pin diagram above is viewed looking into the male plug. The above color scheme is standard for M8 connectors and can be used for external wiring applications. When the PAA630 cable is plugged into an LIU series unit, the table above relates cable wire color to unit pin number.


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APPLICATION IDEA

Dichroic Filters and Filter Wheel for Multi-Color Light Source

The image below and to the left shows the LIUCWHA white LED array being inserted between the 30 mm cage rods. The LED is sandwiched between a CFW6 30 mm Cage Filter Wheel and a CP37 30 mm Cage Plate so that it cannot slide along the cage rods. The Ø35 mm aperture of the CP37 cage plate allows for easy access to the power terminal located on the rear of the unit. The photo below and to the right shows the completed assembly.

In this application, the CFW6 was loaded with Ø1" dichroic filters (FD1R Red Filter, FD1G Green Filter, FD1B Blue Filter, FD1M Magenta Filter, FD1Y Yellow Filter, and FD1C Cyan Filter). When combined with the white LED array, the user can illuminate the sample, object, or subject with any of the primary or secondary colors by simply rotating the filter wheel.

For automated applications, the CFW6 can be replaced with either a FW102C or FW103(/M)  motorized filter wheel. In addition, these LED arrays can be mounted to any SM1-threaded (1.035"-40) motorized filter wheel that is not cage compatible by using 30 mm cage rods, an SM1T2 coupler, and a CP33 cage plate.

LIU App Shot
Click to Enlarge

To secure the LIUCWHA LED array within a 30 mm cage system, it can be sandwiched between two 30 mm cage components. Here, the LED array is being secured by the CFW6 filter wheel and the CP37 cage plate.
LIU App Shot
Click to Enlarge
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The white LED array combined with our dichroic filters can be used to selectively illuminate a sample with a particular color.

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LED SELECTION GUIDE

This tab includes all LEDs sold by Thorlabs. Click on More [+] to view all available wavelengths for each type of LED pictured below.

Light Emitting Diode (LED) Selection Guide
Click Photo to Enlarge
(Representative; Not to Scale)
Type Unmounted LEDs Pigtailed LEDs LEDs in
SMT Packages
LED Arrays LED Ring Light Cage-Compatible
Diffuse Backlight LED
Light Emitting Diode (LED) Selection Guide
Click Photo to Enlarge
(Representative; Not to Scale)
Type PCB-
Mounted LEDs
Heatsink-
Mounted LEDs
Collimated LEDs for Microscopyb Fiber-
Coupled LEDs
c
High-Power LEDs for Microscopy Multi-Wavelength
LED Source Optionsd
  • Measured at 25 °C
  • 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 Multi-Wavelength LED Sources are 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).
  • Typical power for LEDs with the Zeiss Axioskop collimation package (Item # Suffix: -C4).
  • Percentage of LED intensity that emits in the blue portion of the spectrum, from 400 nm to 525 nm.

Hide LED Array Light Sources (Power Supply Not Included)

LED Array Light Sources (Power Supply Not Included)

Item # LIU470A  LIU525B LIU590A LIU630A LIU780A LIU850A LIUCWHA
Image
(Click to Enlarge)
LIU470A LIU525A LIU590A LIU630A LIU780A LIU850A LIUCWHA
Color Blue Green Orange Red Infrared (IR) Infrared (IR) Cold White
Central Wavelength 470 nm 525 nm 590 nm 630 nm 780 nm 850 nm Color Temperature:
4600 K - 9000 K
Intensitya 4.0 mW/cm2 1.9 mW/cm2 1.4 mW/cm2 2.4 mW/cm2 3.7 mW/cm2 3.5 mW/cm2 3.0 mW/cm2
Total Output Power 253 mW 111 mW 109 mW 208 mW 315 mW 322 mW 250 mW
Typical Max Current 80 mA
Supply Voltage 24 V
Operating (Ambient) Temperature 0 to 40 °C (Non-Condensing)
Storage Temperature -40 to 70 °C
Emission Spectrumb LIU470A LIU525A LIU590A LIU630A LIU780A LIU850A LIUCWHA
Intensity Distributiona,c Intensity Distribution Intensity Distribution Intensity Distribution Intensity Distribution Intensity Distribution Intensity Distribution Intensity Distribution
  • When measured at a distance of 100 mm from the LED along the emission axis.
  • Click the graph icon to view the emission spectrum of each LED unit. Click here to download raw data.
  • Click the graph icon to view the intensity distribution of each LED unit. Click here to download raw data.

Part Number
Description
Price
Availability
LIU470A
470 nm Blue LED Array Light Source (Power Supply Not Included)
$275.60
Today
LIU525B
525 nm Green LED Array Light Source (Power Supply Not Included)
$275.60
Today
LIU590A
590 nm Orange LED Array Light Source (Power Supply Not Included)
$386.07
Today
LIU630A
630 nm Red LED Array Light Source (Power Supply Not Included)
$275.60
3 weeks
LIU780A
780 nm Infrared (IR) LED Array Light Source (Power Supply Not Included)
$336.19
Today
LIU850A
850 nm Infrared (IR) LED Array Light Source (Power Supply Not Included)
$336.19
Today
LIUCWHA
Cold White LED Array Light Source (Power Supply Not Included)
$275.60
Today

Hide LED Array Power Supply and M8-Connectorized Power Cord

LED Array Power Supply and M8-Connectorized Power Cord

To power the LED arrays sold above, two options are available. The LIU-PS is a 24 VDC power supply designed to power the LIU LED Arrays at full intensity. It is shipped with four plug adapters: plug type A (North America and Japan), plug type C (Europe), plug type G (UK and Ireland), and plug type I (Australia and New Zealand).

We also offer the PAA630, a 2 m long power cord with an M8 connector on one end and four bare wires on the other end. The M8 connector is compatible with the receptacle on the LIU LED Arrays, allowing them to be easily connected to an existing 24 V power supply.

Note: This power supply is only intended for use with the LED arrays sold above. It is not compatible with our High-Power Mounted LEDs, Collimated LEDs, or Fiber-Coupled LEDs.


Part Number
Description
Price
Availability
LIU-PS
DC Power Supply for LIU Series LED Array, 24 V
$72.46
Today
PAA630
2 m LED Light Source Power Cord, M8 Straight Socket
$29.11
Today

Hide LED Mounting Adapter

LED Mounting Adapter

LED mounting app shotClick to Enlarge
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The AD38 mounting adapter is used to secure an LED array inside a KC2L kinematic mount.

The AD38 double-bored mounting adapter holds an LIU LED Array in place with a single 8-32 nylon-tipped setscrew. The adapter ring has a 2" outer diameter for compatibility with our Ø2" optic mounts, such as the KC2L kinematic mount shown to the right. To mount the LED array, simply secure it within the adapter with the top-located setscrew, slide the LED array and adapter into desired mount, and secure the adapter with either a setscrew or an SM2RR retaining ring, depending on the mount.


Part Number
Description
Price
Availability
AD38
Ø2" to Ø38 mm Mount Adapter for LIU Series LED Array
$21.02
Today