Optical spectrometer for the acquisition of spectra in different areas

摘要

The spectrometer includes initial dispersion device receptive of source radiation to effect light radiation in the form of an initial spectrum, a number of dispersion gratings receptive of the initial spectrum and being crossed with the initial dispersion device to effect a spectrally dispersed beam, and detector device comprising a two dimensional array of photodetectors receptive of the beam for spectral detection. The dispersion grating has a grating surface comprising two surface portions. The first portion has a first groove configuration for effecting the dispersed beam in a first spectral range, and the second portion has a second groove configuration for effecting the dispersed beam in a second spectral range different from the first spectral range.