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Suppression of fundamental-frequency phase errors in phase-shifting interferometry.

Authors
  • Burke, Jan
Type
Published Article
Journal
Optics Letters
Publisher
The Optical Society
Publication Date
Jun 15, 2010
Volume
35
Issue
12
Pages
2079–2081
Identifiers
DOI: 10.1364/OL.35.002079
PMID: 20548392
Source
Medline
License
Unknown

Abstract

I develop and test several new phase-shifting formulas for a Fizeau interferometer, using a spherical cavity of high NA. The associated phase-shift miscalibrations provide a useful range for testing phase-shift error compensation experimentally. After removing the "double-frequency" cyclic phase variation from the error-fringe pattern by well-known methods, the residual phase oscillations occur mainly at 1 and 3 times the fringe frequency. The latter can be addressed by the theory of characteristic polynomials; the former cannot, but is removed by a variation on known averaging methods, and allows empirical optimization of phase-reconstruction performance, which can then be analyzed with characteristic polynomials again.

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