Document Detail

Phase-shifter calibration and error detection in phase-shifting applications: a new method.
MedLine Citation:
PMID:  18301599     Owner:  NLM     Status:  In-Data-Review    
The phase-shifting technique is used in optical metrology to evaluate the local phase of a fringe pattern. Accurate calibration of the shifting device is often essential but sometimes hardly possible because of deviations of the fringe pattern from the ideal sinusoidal shape and because of a nonconstant phase shift between consecutive frames. We introduce a new technique for calculating the phase shift between frames even in the presence of high noise and nonsinusoidal fringe patterns. In addition, this technique permits the identification of different error sources such as low signal-to-noise ratio, higher harmonics contained in the fringe pattern, and nonconstant phase shift.
B Gutmann; H Weber
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Applied optics     Volume:  37     ISSN:  0003-6935     ISO Abbreviation:  Appl Opt     Publication Date:  1998 Nov 
Date Detail:
Created Date:  2008-02-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0247660     Medline TA:  Appl Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  7624-31     Citation Subset:  -    
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