Optical system and method for eliminating overlap of diffraction spectra
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United States of America Patent
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Jun 13, 1995
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N/A
app pub date -
Apr 30, 1993
filing date -
Apr 30, 1993
priority date (Note) -
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Abstract
An optical system and a method for separating overlapping spectra from a diffraction grating and an imaging spectrometer with increased free spectral range are disclosed. The light from a diffraction grating consists of multiple spectra overlapping each other and displaced along a spectral axis. The invention directs the light from the grating to a refractive element such, as a prism. The prism further disperses the light along the same spectral axis. The individual spectra are sufficiently displaced such that they no longer interfere with each other.
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