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Wavefront filter for double-exposure holographic interferometry

Hariharan, P and Ramprasad, BS (1973) Wavefront filter for double-exposure holographic interferometry. In: Journal of Physics E - Scientific Instruments, 6 (2). pp. 173-175.

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Measurements of small phase shifts by double-exposure holographic interferometry are facilitated, and ambiguities in the sign of the phase shift eliminated, by introducing a background pattern of interference fringes. A simple and reliable optical system for this purpose utilizing a rotating wedge is described, with which fringes of any desired orientation and spacing can conveniently be obtained. It is shown how this system can be used under certain conditions for measurements of small mechanical deformations.

Item Type: Journal Article
Publication: Journal of Physics E - Scientific Instruments
Publisher: Institute of Physics
Additional Information: Copy right of this article belongs to Institute of Physics
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 05 Jan 2010 06:16
Last Modified: 19 Sep 2010 05:46
URI: http://eprints.iisc.ac.in/id/eprint/23567

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