The SP-2Cs, available from Photometric Solutions International , are compact and fast spectroradiometers designed for real-time chromaticity measurement. The devices feature a single diffraction grating and CCD array arrangement, enabling the entire spectrum to be acquired in a single scan of the CCD array. The entrance slit, alignment optics, CCD array and grating are all in fixed positions and as such, the spectroradiometers have no moving parts and no further wavelength calibrations are required after the manufacturing process.
After the SP-2C has acquired a spectrum, it is displayed on the screen with the chromacity coordinates as well as the colour temperature of the source. Integration times vary from 4ms to one minute. The compact spectroradiometer is a useful research tool for monitoring the change in colour of a sample over time as it can log the spectra as it is measured.