Low-resolution broadband infrared spectrograph

Details Low-resolution broadband infrared spectrograph Low-resolution broadband infrared spectrograph

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993opten..32.3102h&link_type=abstract

Optical Engineering 32(12), 3102-3104, Brian J. Thompson; Ed.

Physics

1

Scientific paper

A preliminary design for an imaging spectrograph that simultaneously covers the 2.15- to 5.2-micrometers spectral region with a resolution of 0.01 to 0.03 micrometers is described. The instrument is an extension to two dimensions of an existing IR spectrograph that uses 1D arrays of IR detectors. In the 2D version, light entering the spectrograph through a slit is dispersed onto a 256- X 256- pixel InSb array by a novel spherical-faced prism and mirror combination. The use of a prism rather than a grating disperser allows more than a one-octave spectral interval to be covered with no moving parts. In addition, the prism optical efficiency remains high over the entire band covered. The simplicity and ruggedness of the design make it ideal for a space-borne instrument.

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