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Optical Engineering

Phase step calibration and phase measurement in image plane holography using BaTiO3 crystal as a recording medium
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Paper Abstract

A real-time visual approach for the calibration of phase step in image plane holography using BaTiO3 crystal as a recording medium is reported. In this method, the diffuse object is illuminated symmetrically with two collimated beams and a pump beam is added at the crystal plane. Each illuminating beam generates an individual interferogram at the observation plane when the object is subjected to load. A ? phase shift to one of the illuminating beams results in the complete disappearance of the fringes due to phase reversal between the individual interferograms, and at 2? phase change, the fringe pattern is restored. After calibration, a single-beam illumination configuration is used for phase measurement. We present the theory of the method and experimental results for a centrally loaded diaphragm rigidly clamped along the periphery.

Paper Details

Date Published: 1 November 1998
PDF: 8 pages
Opt. Eng. 37(11) doi: 10.1117/1.601879
Published in: Optical Engineering Volume 37, Issue 11
Show Author Affiliations
S. Suja Helen, Indian Inst. of Technology (India)
Mohammad H. Majles Ara, Indian Institute of Technology (Iran)
J. S. Darlin, Indian Institute of Technology (India)
Nandigana K. Krishna Mohan, Indian Institute of Technology/Madras (India)
Mahendra P. Kothiyal, Indian Institute of Technology (India)
Rajpal S. Sirohi, Indian Institute of Technology/Madras (India)

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