SHAPED FILTER FOR SPECTROMETER DETECTOR ARRAYS

摘要

A spectrometer (100) for optically characterizing a species in the ultraviolet and/or visible wavelength range is described. The spectrometer comprises a filter (110) for reducing or blocking a spectral portion of an impinging radiation and a detector (120) adapted for distinctively detecting spectral components of radiation impinging on a sensor surface. The filter (110) is directly mounted on a sensor surface of the detector and is a shaped filter having (110) a shape for partly covering the detector surface and partly leaving the detector surface open, the filter being adapted for blocking a spectral portion of impinging radiation at the covered sensor surface. In this way second or higher order diffraction beams can be blocked from reaching the detector surface. It also relates to a corresponding detector.