Avantes BV has released two cosine correctors for solar measurement applications. The CC-UV/VIS/NIR-8MM has an 8-mm active area, while the CC-UV/VIS/NIR-5.0 offers a 5° angular field of view. The spectroradiometric sampling optics are designed to collect light over 180°, eliminating the problems with interface geometry that are associated with other light collection devices. Both versions offer Radin quartz diffusing material optimized for applications from 200 to 2500 nm. When coupled to a miniature fiber optic spectrometer, they can measure UV-A and UV-B solar radiation as well as environmental light and other emissions.