The CAS 140D is a high-precision array spectroradiometer recognized as a global benchmark in spectral light measurement. For accurate measurements of a diverse range of light sources, from 200 – 1700 nm. Accurate, robust, and reliable, this instrument offers a peerless combination of attributes. More details for CAS 140D-HR can be seen below. Based on the proven Crossed-Czerny-Turner spectrographs with a cooled CCD detector. The high-resolution CAS 140D-HR spectroradiometer is based on Instrument Systems successful CAS 140D series of array spectroradiometers. It was developed specially for the evaluation of narrow-band emission sources (laser, VCSEL) and offers extremely high spectral resolution with short measuring.