LEAST-SQUARES FITTING OF THE PHASE MAP OBTAINED IN PHASE-SHIFTING ELECTRONIC SPECKLE PATTERN INTERFEROMETRY
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- Title
- LEAST-SQUARES FITTING OF THE PHASE MAP OBTAINED IN PHASE-SHIFTING ELECTRONIC SPECKLE PATTERN INTERFEROMETRY
- Authors
- HONG, CK; RYU, HS; LIM, HC
- Date Issued
- 1995-04-15
- Publisher
- OPTICAL SOC AMER
- Abstract
- A new method has been developed to remove noise from the deformation phase map obtained by a phase-shifting electronic speckle pattern interferometry. Unlike usual methods, it estimates almost noise-free phase values directly from the distributions of the intensity differences of four interference patterns by a least-squares fit. The fluctuations of uniform deformation phases are reduced to less than 0.05 rad with a 5 x 5 pixel-fitting window. The so-called sawtooth phase jumps that are due to the use of arctangent functions are retained sharply in this method.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/21803
- DOI
- 10.1364/OL.20.000931
- ISSN
- 0146-9592
- Article Type
- Article
- Citation
- OPTICS LETTERS, vol. 20, no. 8, page. 931 - 933, 1995-04-15
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- There are no files associated with this item.
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