Color Sensors

Isolight chart holder showing detail of corner sensor

The heart of each Isolight Color is its four RGB color sensors.  Each sensor is cosine-corrected and closely matches the standard CIEXYZ (human eye) spectral response.  Positioned at each of the test chart four corners, the color sensors measure illumination color, absolute light level, and illumination uniformity.  The sensors are always positioned near your test chart, so you never have to try to hold or mount a hand-held light meter in the scene again.

Color is reported as a correlated color temperature (in degrees K) or as Yxy coordinates.  The USB interface also reports color in Yu’v’ colorspace.  Light level is reported in Lux.  By measuring both color and light level, you will be able to ensure your lighting is the best for your image quality calibration and testing needs.


The entire light sensor system operation is fully auto-ranging.  Independent programmable gain stages,  a 24bit ADC, and automatic gain adjustment delivers seven orders of magnitude of dynamic range without ever pressing a button.  Take accurate light measurements from near complete darkness to full sunlight.
Wide dynamic range and autoranging means you never have to risk disturbing a test scene to adjust the light meter’s range.

Selectable Update Rate

The ADC conversion rate is adjustable from 0.25 sec to 2.0 sec, to allow you to choose between fast response and stable, flicker-free readout.