Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1235..622h&link_type=abstract
IN: Instrumentation in astronomy VII; Proceedings of the Meeting, Tucson, AZ, Feb. 13-17, 1990 (A91-29601 11-35). Bellingham, WA
Astronomy and Astrophysics
Astronomy
5
Interferometers, Optical Heterodyning, Space Observations (From Earth), Spaceborne Astronomy, Spectroscopy, Design Analysis, Layouts, Ultraviolet Spectra, Visible Spectrum
Scientific paper
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.
Harlander Jens
Roesler Fred L.
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