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A Study on PALC Phase Shifting Shearing ESPI

Jang Lijun Liu Wei Tan Yushan (Institute of Mechnical Engineering, Xian Jaotong University, Xian 710049)  
Characteristics of phase modulation of a nematic liquid crystal is studied. A new phase shifting shearing ESPI system which uses parallel aligned liquid crystal as a phase modulator is deceloped. This method lincreases the mearsuring accuracy of shearing ESPI by combining phase shifting technology with shearing ESPI. The phase modulation is simple. The correlation fringe method is used for phase calculation. Satisfactory results are acquired in the experiments on deformation measurement.
【CateGory Index】: O753.2
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Chinese Journal Full-text Database 1 Hits
1 ZHEN WENG AND TAN YUSHAN (Department of Mechanical Engineering, Xian Jaotong University, Xian 710049);Two-speckle-patterns phase-shifting digital interferometry[J];Acta Optica Sinica;1991-03
Chinese Journal Full-text Database 2 Hits
1 REN Yaping LUO Deyuan JIANG Lijun ZHAO Mingtao ZHANG Chi TAN Yushan (Xi'an Jiaotong University,Xi'an 710049,CHN);Real-time digital speckle pattern interferometer and its applications[J];SEMICONDUCTOR OPTOELECTRONICS;1997-02
2 Jiang lijun; Liu Wei; Xie Lei; Tan Yushan(Institute of Mechnical Engineering,Xian Jaotong University, Xian 710049);A study on liquid crystal phase-shifting shearing ESPI[J];Journal of Optoelectronics.laser;1995-03
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