Speckle shearing interferometry using a diffractive optical beam splitter

Details Speckle shearing interferometry using a diffractive optical beam splitter Speckle shearing interferometry using a diffractive optical beam splitter

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997opten..36.1488g&link_type=abstract

Optical Engineering 36(05), 1488-1498, Brian J. Thompson; Ed.

Physics

6

Scientific paper

A novel shearing interferometer is described that uses an optimized phase grating as the shearing element. The method has a number of advantages over a conventional Michelson interferometer shearing device, including light efficiency, simplicity, and low cost. Quantitative fringe analysis is easily carried out by in-plane translation of the grating and the use of standard phase-shifting algorithms. The influence of higher diffraction orders on the noise in the measured phase distributions is discussed.

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