PHASE-EXTRACTION ALGORITHM IN LASER-DIODE PHASE-SHIFTING INTERFEROMETRY

被引：30
|
作者：
ISHII, Y
ONODERA, R
机构：
[1] Department of Electronics, University of Industrial Technology, Sagamihara, Kanagawa, 229
来源：
OPTICS LETTERS | 1995年 / 20卷 / 18期
关键词：
D O I：
10.1364/OL.20.001883
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A phase-shifting interferometer with a laser diode has been studied that is insensitive to the changes in laser power associated with variation in current. The tested phase is measured by six interferograms by a newly developed phase-extraction algorithm. The phase is calculated from a least-squares fit to an interferogram. The systematic phase error that is due to the variation in laser output has been numerically investigated to have a periodicity of 2 pi rad compared with the experimental result for the conventional phase-extraction algorithm. Good agreement between them is shown. (C) 1995 Optical Society of America
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页码：1883 / 1885
页数：3
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