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Optical Engineering

Distance measurement with adjustable range by interferometry with Gaussian beams
Author(s): Guadalupe Santos; Bernardino Barrientos; Moises Cywiak
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Paper Abstract

We describe a technique for distance measurement in applications that require moderate precision. The technique is based on interference fringes resulting from the differing optical path lengths of two Gaussian beams traveling through the arms of a Michelson interferometer. From a propagation analysis of the beams, we find an expression that relates the distance between two surfaces and the resulting phase map from intensity images, making unnecessary the continuous tracking of the order of interference. The range of measurement of the method can be varied by the proper selection of the focal length of an expanding lens, from a fraction of a millimeter to a few centimeters.

Paper Details

Date Published: 1 October 2005
PDF: 6 pages
Opt. Eng. 44(10) 105601 doi: 10.1117/1.2075268
Published in: Optical Engineering Volume 44, Issue 10
Show Author Affiliations
Guadalupe Santos, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
Bernardino Barrientos, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
Moises Cywiak, Ctr. de Investigaciones en Óptica, A.C. (Mexico)

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