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Proceedings Paper

Spatial heterodyne spectroscopy: a novel interferometric technique for ground-based and space astronomy
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Paper Abstract

The theoretical principles and technical feasibility of spatial heterodyne spectroscopy (SHS) for astronomical observations are explored. The SHS setup is basically a Michelson interferometer with the mirrors replaced by diffraction gratings; wavelength-dependent Fizeau fringes are recorded and Fourier analyzed to obtain a high-resolution spectrum even at relatively low spatial frequencies. Two all-reflection SHS instruments are described and illustrated with diagrams, and laboratory test results using CCD detectors for both visible and UV measurements are presented, indicating resolving powers of about 75,000 and 70,000, respectively. Also discussed are the advantages and limitations of SHS vis a vis other Fourier-transform spectroscopic methods.

Paper Details

Date Published: 1 July 1990
PDF: 12 pages
Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); doi: 10.1117/12.19125
Show Author Affiliations
John M. Harlander, Univ. of Wisconsin/Madison (United States)
Fred L. Roesler, Univ. of Wisconsin/Madison (United States)

Published in SPIE Proceedings Vol. 1235:
Instrumentation in Astronomy VII
David L. Crawford, Editor(s)

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