ON Semiconductor Image Sensors


Technology for low lighting imaging

RGB-InfraRed (RGB-IR) is a different filter type where one green spot in the standard Bayer Color Filter Array (CFA) is substituted with a spot which admits the Near-Infrared (NIR) wavelength to reach the sensor. 

Standard Bayer RGB CFA RGB-IR
Color matrix with a Standard Bayer RGB CFA Color matrix with RGB-IR

This RGB-IR filter lets the sensor to be used as a standard color and as a NIR sensor. This is very useful in applications where the camera needs to be used in very different light conditions (i.e. day and night): during the night, the scene can be illuminated with a InfraRed light source which is only visible by the camera and not by the human eye.

The drawback of this technology is a loss of the quantum efficiency for the RGB wavelengths.

Here two quantum efficiency plots are taken from a sensor which shows the difference between a conventional Bayer CFA and an RGB-IR filter. As you can see, using the RGB-IR filter will slightly drop the quantum efficiency of the RGB wavelengths.





Display portlet menu

Related product

On Semi Return to Campaign (RRCD)

Display portlet menu

Low Lighting Imaging

Learn more about ON Semiconductor image sensors for low lighting conditions.

Read more