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A phase stepping technique for digital speckle pattern shear interferometer with the aid of a diffraction grating as shear element, is presented. In-plane translation of the grating introduces the required phase shift. Experimental results are presented to show the validity of the proposal.
Roberto Torroba
"Phase stepping in digital grating-shear speckle pattern interferometry", Proc. SPIE 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 27784I (1 September 1996); https://doi.org/10.1117/12.2299044
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Roberto Torroba, "Phase stepping in digital grating-shear speckle pattern interferometry," Proc. SPIE 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 27784I (1 September 1996); https://doi.org/10.1117/12.2299044