Spatial heterodyne spectroscopy: interferometric performance at any wavelength without scanning

Fred L. Roesler; John M. Harlander

doi:10.1117/12.22119

1 December 1990 Spatial heterodyne spectroscopy: interferometric performance at any wavelength without scanning

Fred L. Roesler, John M. Harlander

Proceedings Volume 1318, Optical Spectroscopic Instrumentation and Techniques for the 1990s: Applications in Astronomy, Chemistry, and Physics; (1990) https://doi.org/10.1117/12.22119
Event: Optical Spectroscopic Instrumentation and Techniques for the 1990s: Applications in Astronomy, Chemistry, and Physics, 1990, Las Cruces, NM, United States

Abstract

Spatial heterodyne spectroscopy (SHS) employing a two-beam dispersive interferometer producing a Fizeau fringe pattern having wavelength-dependent spatial frequencies is presented. The pattern is recorded on an imaging detector and Fourier transformed to recover the input stream. It is pointed out that spectrometers operating on the SHS principle can achieve the theoretical resolution limit of the gratings without scanning, retaining at the same time the large angular input tolerance and multiplexing properties of conventional scanning Fourier-transform spectrometers. Additionally, broad spectral coverages can be achieved, and field widening can be accomplished without moving parts.

Citation Download Citation

Fred L. Roesler and John M. Harlander "Spatial heterodyne spectroscopy: interferometric performance at any wavelength without scanning", Proc. SPIE 1318, Optical Spectroscopic Instrumentation and Techniques for the 1990s: Applications in Astronomy, Chemistry, and Physics, (1 December 1990); https://doi.org/10.1117/12.22119

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