Patent ID: 9354116
Filing Date: 2016-05-31
CPC Classification: G01J

Claim Text:
1. A multi-channel double-pass imaging spectrometer comprising: at least one slit through which incident electromagnetic radiation enters the spectrometer; at least one imaging detector positioned at an image plane of the spectrometer, the image plane being co-located with the at least one slit; double-pass all-reflective reimaging optics configured to receive the electromagnetic radiation from the at least one slit and to output a collimated beam of the electromagnetic radiation, and further configured to produce a reimaged pupil positioned between the double-pass all-reflective reimaging optics and the image plane; a beamsplitter configured to split the collimated beam of the electromagnetic radiation into a first spectral band and a second spectral band; a first dispersive element configured to spectrally disperse the first spectral band of the electromagnetic radiation to provide a first dispersed output, the first dispersive element being oriented to direct the first dispersed output through the double-pass all-reflective reimaging optics to the image plane; and a second dispersive element configured to spectrally disperse the second spectral band of the electromagnetic radiation to provide a second dispersed output, the second dispersive element being oriented to direct the second dispersed output through the double-pass all-reflective reimaging optics to the image plane.