Simple phase-shifting method in a wedge-plate lateral-shearing interferometer

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A simple phase-shifting method in a wedge-plate lateral shearing interferometer is described. Simply moving the wedge plate in an in-plane parallel direction gives the amount of phase shift required for phase-shifting interferometry because the thickness of a wedge plate is not constant and varies along the wedge direction. This method requires only one additional linear translator to move the wedge plate. The required moving distance for a phase shift of the wave front with this method is of the order of a millimeter, whereas the typical moving distance for another method that uses a piezoelectric transducer is of the order of a wavelength. This method yields better precision in controlling the moving distance than do the other methods. (C) 2004 Optical Society of America.
Publisher
OPTICAL SOC AMER
Issue Date
2004-07
Language
English
Article Type
Article
Citation

APPLIED OPTICS, v.43, pp.3989 - 3992

ISSN
0003-6935
URI
http://hdl.handle.net/10203/80900
Appears in Collection
PH-Journal Papers(저널논문)
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