Products HomeLED 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
Please Wait
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.
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The drawing above shows a back view of the LIU470A LED array.
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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.
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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.Pin Diagram for LED Arrays
| Pin | Specification | Wire Color on PAA630 Cable |
|---|---|---|
| 1 | 24 VDC | Brown |
| 2 | Ground | White |
| 3 | Not Connected | Blue |
| 4 | Not Connected | Black |
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.
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.
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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.
Click to Enlarge The white LED array combined with our dichroic filters can be used to selectively illuminate a sample with a particular color.
| Posted Comments: | |
Michael Moyes
(posted 2023-08-07 15:46:21.38) Good day - I recently purchased a LIUCWHA and a LIU525B.
My question relates to the LIUCWHA.
I am using a CCS100 (recently purchased as well) in conjunction with the LIUCWHA. The wavelength vs amplitude plot of the published data doesn't match what I observe on the CCS100. If I normalise the 465nm trace to have an amplitude of "1" (full scale on the CCs100) then the 2nd peak at about 550nm has an amplitude of about 0.42. I was expecting this 2nd peak to about 0.6, as per data sheet. The CCS100 is being used with its supplied fiber optic cable and no other items connected, and in the "amplitude correction mode". If I repeat the exercise but normalise to half max amplitude "0.5", the situation remains the same, the 2nd peak is at about 0.2.
So also what I am also asking, do all the lamps have an output amplitude spectrum curve close to the published curves, or is it only the total light output that is constant (eg. 3mW/m2).
Thanks hchow
(posted 2023-08-09 10:14:39.0) Dear Mr. Moyes, thank you for your feedback. I will personally reach out to you to provide the necessary information. Thank you. Nicolas Alegría
(posted 2023-03-17 17:42:53.117) Hi, I use the white light LED and I'm trying to collimate it but I'm having trouble with this. Do you recommend any optical element designed for this product or something like that? hkarpenko
(posted 2023-03-20 08:31:50.0) Dear customer,
thank you for your feedback. We usually recommend using aspheric condensor lenses to collimate LEDs, but in case of LED arrays, it might work less efficient. I will contact you directly to discuss this further with you. Anna Alexander
(posted 2021-05-25 18:49:30.78) Is there any way to purchase this product without the plastic diffuser on the front? I would like a quote for this is it's an option. soswald
(posted 2021-05-28 07:11:07.0) Dear Anna,
thank you for your feedback. I have contacted you directly to further discuss your application and explore the possibility of offering a suitable custom solution. user
(posted 2015-10-09 12:54:41.613) Purchased LIU525A and within 20 hours, some of the LEDs were out. We were able to return the unit and get a replacement (with some hesitation from thorlabs). The second unit eventually lost some LEDs, too! For a $200+ unit, I would expect it to last much longer. Therefore, we won't be purchasing any more array lights. jvigroux
(posted 2015-10-12 11:28:50.0) A response from Julien at Thorlabs: We are very sorry about the difficulty you have experienced with this product. The repeated issues you have been having are extremely unlikely. The return and failure rates for the LUI line is very low. We will contact you directly to further discuss the exact environmental parameters in your set up to see if maybe a root cause for the failures can be found there and work out a specific solution. user
(posted 2014-01-08 16:01:16.433) Is it possible to operate 4 LIU104 light sources all at the same time using the DC4100 LED controller and breakout box? tschalk
(posted 2014-01-09 03:57:37.0) This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. The Arrays are equipped with an integrated circuit which drive the individual LEDs and an additional 24V power supply for the whole array is needed. It is not possible to drive the LED Array with our LED drivers and control, for example, the brightness of the LEDs. Please contact me at europe@thorlabs.com if you need any further information. prdm2
(posted 2013-09-11 11:54:39.253) Hello, I was hoping you could suggest which type of safety glasses filter material would be suitable with use for these products?
Thankyou jlow
(posted 2013-09-11 09:03:00.0) Response from Jeremy at Thorlabs: We will contact you regarding this. You can contact a local office to discuss about your applications in the future. Our contact information is provided at http://www.thorlabs.com/locations.cfm. nicolas.beaugerard
(posted 2013-06-28 12:14:51.117) Hello, I would like to know how to control the LED brightness.
I guess that I need to add a potentiometer between the pin 2 and the ground. Is that's corect? More over, what resistivity do you recommend ? tschalk
(posted 2013-07-03 08:06:00.0) This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. A typical control unit is shown in the manual of the LED Array: http://www.thorlabs.de/Thorcat/16000/LIU004-Manual.pdf. The LED brightness can be controlled by a variable controlled current device. The maximum current for the LED Array is 120mA. I will contact you directly for more detailed information. jvigroux
(posted 2012-10-11 12:43:00.0) A response from Julien at Thorlabs: Thank you for question! There is no need to add an extra resistor. The LIU are designed to work with 24V input voltage and as such there is already a input resistor to ensure that the current through the LED is correct for this voltage user
(posted 2012-10-11 06:59:35.487) I need to clarify the example circuit in the manual.
Do we need to add a load resistor in series with a 24V PSU to fix the current to max intensity or does the LIU004 have this already. we do not want to connect a pSU directly to this if it unprotected. jvigroux
(posted 2012-07-11 07:28:00.0) a response from Julien at Thorlabs: thank you for your inquiry. The weight of the LIU004 is about 96 grams. joseph.hampton
(posted 2012-07-10 13:13:04.0) Hello,
do you know the approximate mass of LIU004?
cheers! jvigroux
(posted 2012-06-20 08:21:00.0) A response from Julien at Thorlabs: Thank you for your feedback! In principle, the LED should indeed work with no optical power reduction for the specified time. The specified time is however valid only for the conditions it was tested in (temperature, voltage, voltage and current stability...). I will contact you to discuss the way the LED was used and see if there is maybe an external factor that could have precipitated the degradation of the LED. If not, we would of course exchange the LED within the warranty. david.lee
(posted 2012-06-18 10:10:23.0) The stated operating lifetime for the LIU004 LED light source is up to 100,000 hours which is approximately 11 years. We have two of these units, both operating with the LIU-PS power supply. On one unit 10 of the LEDs have failed. On the second unit many of the LEDs now have significantly lower brightness than the brightest LED causing the source appear highly non-uniform. I suspect the dim LEDs will fail soon. Both units have only been operated for approximately 1,000 hours. Is LED lifetime a known issue? Could we improve the LED lifetime by operating at a lower power? Any comments regarding improving the lifetime would be appreciated. jvigroux
(posted 2011-12-08 10:20:00.0) A response from Julien at Thorlabs: Unfortunately the compliance voltage of the LEDD1B is around 12V while the required forward voltage for the LIU001 is 24V. The LEDD1B is meant to be use primarily with our high power mounted LEDs. The most suited adjustable LED driver for the LIU00X would be the DC2100 due to its high compliance voltage. jripoll
(posted 2011-12-07 08:22:51.0) Dear Sirs,
Can the LIU001 be used with the LEDD1B to regulate its intensity?
Thanks and best regards,
Jorge klee
(posted 2009-10-19 10:41:29.0) A response from Ken at Thorlabs to mhyde5: Unfortunately, we are unable to offer an LED light source at 1550nm at this time. mhyde5
(posted 2009-10-16 10:39:32.0) I see in the comments below that you were able to construct an LED light source at 780 nm. I was wondering if you could construct one at 1550 nm? I have 5 of your unmounted 1550 nm LEDs; however, they do not provide enough light for my application.
Milo Hyde Greg
(posted 2009-04-06 09:29:00.0) An update from Greg at Thorlabs to jcheng: After talking with colleagues further, we have found that we are able to offer an LIU series LED source at 780 nm. Please let me know via e-mail or contact Technical Support if you are still interested in such a unit. Greg
(posted 2009-03-27 07:36:08.0) A response from Greg at Thorlabs to jcheng: Unfortunately we are unable to offer an LIU series LED source at 780 nm at this time. We do offer unmounted LEDs at 780 nm: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=2814 jcheng
(posted 2009-03-25 17:40:34.0) Hi, I am just wondering if you can make the similar package at 780nm?
Thanks,
Janice Cheng, Ph.D
jcheng@pacificbiosciences.com
650-521-8134
System Integration and Verification Group
Pacific Biosciences
Menlo Park, CA, 94025 technicalmarketing
(posted 2007-09-19 18:53:10.0) The compatable power supply has the item number LIU-PS and is sold separately. It is shown in our Volume 19 catalog on page 523. It will be added to this web presentation on 09/24/2007. acable
(posted 2007-09-15 10:19:59.0) Is a power supply included, if not do you sell a compatable supply. |
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 | ||||||
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| Type | Unmounted LEDs | Pigtailed LEDs | LEDs in SMT Packages |
LED Arrays | LED Ring Light | Cage-Compatible Diffuse Backlight LED |
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| Type | PCB- Mounted LEDs |
Heatsink- Mounted LEDs |
Collimated LEDs for Microscopyb | Fiber- Coupled LEDsc |
High-Power LEDs for Microscopy | Multi-Wavelength LED Source Optionsd |
| Item # | LIU470A | LIU525B | LIU590A | LIU630A | LIU780A | LIU850A | LIUCWHA |
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| 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 | ||||||
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| Intensity Distributiona,c |  |
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Click to EnlargeTo 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.
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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.
LED Array Lamps