The Isolight Puck light and color sensor is an ideal companion for image quality testing or camera calibration systems.  No matter your scene size, the Puck lets you quickly measure and verify your lighting color, light level, and uniformity.

The Puck is compact enough to fit in small areas or be embedded in a scene.  By arranging multiple Pucks into a group, you can measure lighting brightness and color uniformity across any size test chart.

The Puck connects to your host computer and is compatible with Windows, Mac, and Linux systems.  Controlled through a simple serial-over-USB protocol, the Puck is easy to integrate into your test software.

Each Puck comes with a 3m (10 ft) mini-B USB cable and velvet storage pouch.

  • Incident light readings from 0.1 lux to 1.0 Mlux
  • Chromaticity reported in either CIE-xy coordinates or correlated color temperature (K)
  • User-controllable RGB LED ring for indicating sensor status
  • 16 user-settable alarms for automatically indicating luminance and chrominance status
  • 16 non-volatile user-settable registers for storing sensor ID, location, or other information
  • Powered and controlled over USB 2.0 mini-B connector
  • Serial-over-USB interface is compatible with Windows, Mac, Linux, and Android devices
  • Rare-earth magnet on back
  • 1/4″-20 thread on bottom for mounting
  • Case is finished in 18% matte gray
  • Dimensions: 1.6 in x 1.6 in x 0.8 in (40 mm x 40 mm x 21 mm)


Specification Value Conditions
Operating temperature 0ºC to 40ºC (32ºF to 104ºF)
Storage temperature -10ºC to 50ºC (14ºF to 140ºF)
Humidity Less than 80% RH Non-condensing

Optical Specifications – General

Specification Value Conditions
Detector area 78.5 mm2 (10mm diameter disc)
Angular response <4% Deviation from ideal cosine(theta) response
Range selection Fully automatic
Measurement rate 200 to 60,000 milliseconds

Optical Specifications – Luminance

Specification Value Conditions
Spectral response TBD % deviation from CIE  photopic curve  method under tungsten (A) light
Luminance measurement range 0.1 Lux to 1.0MLux
Resolution 0.25 Lux or 1% of reading, whichever is greater
Accuracy +/- 3% Tested under standard A (2856K tungsten) light

Optical Specifications – Chrominance

Specification Value Conditions
Detector type Three silicon photodiodes with color filters
Spectral response TBD % deviation from CIE  photopic curves  method under tungsten (A) light
Color measurement (CCT) 2,000K to 50,000K CCT is valid within approx. 0.05 units from the Plankian blackbody radiator curve
Accuracy +/-50K Tested under standard A (2856K tungsten) light

Electrical Specifications

Specification Value Conditions
Input voltage 5.0 VDC
Power requirements TBD W See note [1]

Mechanical Specifications

Specification Value Conditions
Dimensions 40 mm x 40 mm x 21 mm (1.6 in x 1.6 in x 0.83 in)
Mass TBD g

[1] Varies depending on system settings

Product Highlights
Half-page flyer including product highlights and features.
User Manual 2.3
Current version of the user manual.  Includes set-up instructions, background theory, programming guide, and mechanical specifications.
User Manual 1.0
Applies only to older Pucks.  User manual includes set-up instructions, background theory, programming guide, and mechanical specifications.

To aid your development, we have developed MATLAB and Python3 drivers for the Puck.  While these drivers are not ready for release, we are looking for beta testers.  If you are interested, please contact us.

Feature Highlights

LED Indicator and Programmable Alarms

The full-color RGB LED ring can be programmed to alert you to any lighting condition.  Sixteen prioritized alarms can be set to monitor lighting level, color temperature or CIE-xy coordinates.  Choose from:

  • Four variables – luminance in lux, color temperature (K), CIE-x, or CIE-y coordinates
  • 20 test conditions, including greater than, less than, equal, or within range
  • Eight LED colors – white, red, orange, yellow, green, cyan, blue, or magenta
  • Three LED patterns – solid, flash, or spin

Mounting Options

Mount the Puck quickly and securely to light booth walls or white boards with the rear magnet.  The 1/4″-20 thread allows tripod mounting for placing the Puck in scenes or mounting on optical set-ups.

1/4″-20 tripod or post mount

Magnetic backing

Mounted against a light booth

Meter any size chart