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Optical Engineering

Fringe counting system for control of a Fabry-Perot spectrometer
Author(s): Chris A. Forden; William J. Glaccum; Jacqueline Fischer; Howard A. Smith
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Paper Abstract

We have developed optical measurement and control techniques that allow stable, precise adjustment and tracking of Fabry-Perot plate parallelism and spacing over a distance of many fringes with a precision of 20 nm. This extension of the range of optical position sensing has proved useful in controlling a cryogenic, electromagnetically driven, infrared spectrometer for astronomy.

Paper Details

Date Published: 1 September 1990
PDF: 8 pages
Opt. Eng. 29(9) doi: 10.1117/12.55687
Published in: Optical Engineering Volume 29, Issue 9
Show Author Affiliations
Chris A. Forden
William J. Glaccum, Applied Research Corp. (United States)
Jacqueline Fischer, Naval Research Lab. (United States)
Howard A. Smith, Smithsonian Institution (United States)


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