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Optics Letters

Optics Letters

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  • Vol. 21, Iss. 16 — Aug. 15, 1996
  • pp: 1268–1270

Noise-immune method for locating wrap regions in phase-step interferometry

Karl A. Stetson  »View Author Affiliations


Optics Letters, Vol. 21, Issue 16, pp. 1268-1270 (1996)
http://dx.doi.org/10.1364/OL.21.001268


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Abstract

A method is presented that can be applied to phase-step interferometry to locate the regions within which integral multiples of π should be added to the wrapped phase that results from arctangent calculations. Unlike previous methods, this one is immune to the noise-related errors that confuse simple phase-unwrap schemes. It makes use of the fact that the noise-related errors occur at fixed locations in the phase map, whereas the location of the wrap regions depends on the way in which the arctangent is calculated.

© 1996 Optical Society of America

History
Original Manuscript: January 16, 1996
Published: August 15, 1996

Citation
Karl A. Stetson, "Noise-immune method for locating wrap regions in phase-step interferometry," Opt. Lett. 21, 1268-1270 (1996)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-21-16-1268


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