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Talbot interferometry with increased shear

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Abstract

The modification of Talbot interferometer configuration for obtaining moire fringe shearing interferograms with an increased shear amount is proposed. The problem of decrease of interferogram quality that occurs when using higher frequency gratings is significantly eliminated by rotating the beam splitter grating about the axis perpendicular to the grating lines. The theory of the interferometer and its experimental verification are presented.

© 1985 Optical Society of America

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