DocumentCode
2638122
Title
Digital shearing interferometer with a liquid-crystal spatial light modulator
Author
Zhao, S. ; Chung, P.S.
Author_Institution
Dept. of Electron. Eng., City Univ. of Hong Kong, China
fYear
2005
fDate
22-28 Oct. 2005
Firstpage
965
Lastpage
966
Abstract
A novel shearing interferometer is developed using a dynamic grating realized by a twisted nematic liquid-crystal spatial light modulator as the shearing element. A standard phase shifting algorithm can be easily achieved by changing the grating pattern displayed on the spatial light modulator. A shearing interferometer with no moving part and no requirement for calibration of the value of the phase shift was therefore achieved.
Keywords
diffraction gratings; light interferometers; liquid crystal devices; nematic liquid crystals; phase shifting interferometry; spatial light modulators; digital shearing interferometer; dynamic grating; grating pattern; liquid-crystal spatial light modulator; phase shift; shearing interferometer; standard phase shifting algorithm; twisted nematic liquid-crystal; Adaptive optics; Calibration; Digital modulation; Gratings; Lenses; Optical imaging; Optical interferometry; Optical modulation; Phase shifting interferometry; Shearing;
fLanguage
English
Publisher
ieee
Conference_Titel
Lasers and Electro-Optics Society, 2005. LEOS 2005. The 18th Annual Meeting of the IEEE
Print_ISBN
0-7803-9217-5
Type
conf
DOI
10.1109/LEOS.2005.1548333
Filename
1548333
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