Light DiffuserAmazon

With the Lightray Diffuser & Cosine Corrector accessory, you'll get a clip-on diffuser that attaches on your device's front camera. It is tested and designed to work with every iPhone, iPad, and many Android devices.

The accessory's sophisticated design provides your smartphone light meter with an ideal directional response. This leads to accurate measurement results in real-world scenarios where light strikes from different directions.

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

We build user-friendly and affordable mobile apps, so that anyone can experience precise and effortless light measurements.

Light DiffuserPhotography

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.

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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.

Worldwide shipping and tax included* Compatible with all newer iPhones and iPads** Limited compatibility to Android devices** Compatible with iPhone, iPad, and many Android devices** Compatible with your **

Light diffuserDIY

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.

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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.

* We ship with DHL Warenpost International Premium and cover all taxes and duties in most countries. Check for details here.

Forget flimsy, inaccurate light meters. With the diffuser attachment, you'll get professional-grade measurement accuracy from your smartphone. Rivaling expensive hardware meters at a fraction of the cost.

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** Compatible with all newer iPhones and iPads, and many common Android devices. See all compatible devices here.

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).

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.

Before purchasing or diving into the details of using your new diffuser accessory, it's crucial to confirm that your device is compatible.

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.

Developed and perfected by a team of Swiss optics experts and researchers at Zurich University of Applied Sciences, the Diffuser & Cosine Corrector accessory provides you with professional-grade results. It was rigorously tested in an optical laboratory with a wide number of devices to perfect a smartphone's light measurement capabilities.

The Diffuser & Cosine Corrector accessory enables your smartphone to measure light at top-level accuracy without any compromises.

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.

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The Diffuser & Cosine Corrector accessory was developed and tested in a Swiss optics laboratory. Every piece shipped is hand-assembled and has passed strict quality control.

Many common Android devices are supported, but unfortunately not all of them. Please check the list of all 194 compatible devices for yours.

Combined with one of our apps it meets international light measurement standards as described in ISO/CIE 19476. Every piece manufactured is assembled by hand and is required to pass a strict quality control. Our technology is patent pending under US 63/463,568 and US 18/820,817.

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.

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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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.

The semi-transparent white disc at the heart of the accessory is a perfect diffuser. It consists of a microscopically rough surface, created by fine particles and structures embedded in the material. As light enters the diffuser, it's scattered in many directions resulting in a uniform glow exiting the diffuser. This allows your device to take an accurate light measurement using the camera as a light sensor.

Even further, the mechanical assembly allows the accessory to act as a Cosine Corrector, enabling light to hit from any direction without causing measurement errors.

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.