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Proceedings Paper

Laser Diode Interferometry
Author(s): Michael Hercher; Geert Wyntjes
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Paper Abstract

By using a multiphase detection technique, unambiguous shot-noise-limited measurements of unwrapped (i.e. not limited to modulo 21) interferometric phase may be made at data rates in excess of 1 MHz. This technique is ideally suited for use with laser diodes. We describe the technique and associated algorithms which facilitate the rapid processing of data, and we present experimental data obtained with different types of laser diode interferometers--including an imaging interferometer in which phase is digitally measured for each pixel at TV frame rates, and an interferometric linear encoder head which achieves a 1-microinch resolution with a 1250 line/inch linear scale and a 1 MHz update rate.

Paper Details

Date Published: 25 April 1990
PDF: 7 pages
Proc. SPIE 1162, Laser Interferometry: Quantitative Analysis of Interferograms: Third in a Series, (25 April 1990); doi: 10.1117/12.962736
Show Author Affiliations
Michael Hercher, OPTRA Inc. (United States)
Geert Wyntjes, OPTRA Inc. (United States)

Published in SPIE Proceedings Vol. 1162:
Laser Interferometry: Quantitative Analysis of Interferograms: Third in a Series
Ryszard J. Pryputniewicz, Editor(s)

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