The CAS 120 was developed as an economical alternative to the world wide well proven CAS 140CT. The trend towards high power LEDs and solid-state lighting applications allowed to utilize a new detector concept. Therefore, the CAS 120 is now equipped with a back-thinned and back-illuminated CCD array with 2080 x 20 pixels (2048 x 14 active), which is passively cooled.