Four-step spatial phase-shifting shearing interferometry from moiré configuration by triple gratings
- 23 May 2012
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 37 (11) , 1922-1924
Abstract
A spatial phase-shifting shearing interferometry is presented in this paper. The whole optical configuration is simple and consists of three Ronchi gratings. Four phase-shifted shearing interferograms can be obtained simultaneously. The explicit intensity distributions of shearing interferograms are given and a corresponding four-step spatial phase-shifting algorithm is proposed to extract phase information from the new interferometry. This spatial phase-shifting configuration is applied to extract phase projection of a propane flame and a mathematical error analysis is presented.Keywords
Funding Information
- National Natural Science Foundation of China (10804052)
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