## 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

Enhanced HTML Acrobat PDF (354 KB)

### 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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