Aberration effects in two-beam laser interferometers
JOSA A, Vol. 23, Issue 8, pp. 1951-1959 (2006)
http://dx.doi.org/10.1364/JOSAA.23.001951
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Abstract
In displacement measurements by two-beam interferometers, the wavefront curvature of a laser beam causes a systematic increase of the fringe period. This increase depends on beam collimation: It is null for a plane wave and proportional to the squared divergence of the beam. With interfering beams not perfectly recombined, an additional fringe-period error is caused, with the effect of counteracting and also of compensating for and prevailing over the usual error. We describe this hitherto unsuspected effect and give a correction equation.
© 2006 Optical Society of America
OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(260.1960) Physical optics : Diffraction theory
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: December 19, 2005
Manuscript Accepted: February 8, 2006
Citation
Giovanni Cavagnero, Giovanni Mana, and Enrico Massa, "Aberration effects in two-beam laser interferometers," J. Opt. Soc. Am. A 23, 1951-1959 (2006)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-23-8-1951
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