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Proceedings Paper

Laser diode phase-shifting interferometer insensitive to the changes in laser power
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Paper Abstract

A phase-shifting interferometer with a laser diode has been studied that is insensitive to the changes in laser power associated with the current variation. The tested phase is measured from six interferograms by using a newly-developed phase-extraction algorithm. The phase is calculated from a least-squares fit to an interferogram including the intensity variation by the power change. The systematic phase error with the periodicity of 2(pi) rad by the power change of the laser diode has been theoretically investigated as compared with the experimental results for the conventional phase-extraction algorithm. A good agreement between them is shown.

Paper Details

Date Published: 14 June 1995
PDF: 4 pages
Proc. SPIE 2544, Interferometry VII: Techniques and Analysis, (14 June 1995); doi: 10.1117/12.211864
Show Author Affiliations
Yukihiro Ishii, Univ. of Industrial Technology (Japan)
Ribun Onodera, Univ. of Industrial Technology (Japan)

Published in SPIE Proceedings Vol. 2544:
Interferometry VII: Techniques and Analysis
Malgorzata Kujawinska; Ryszard J. Pryputniewicz; Mitsuo Takeda, Editor(s)

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