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Optical Engineering

Real-time speckle photography with two-wave mixing in photorefractive BaTi03 crystals
Author(s): P. R. Sreedhar; Nandigana K. Krishna Mohan; Rajpal S. Sirohi
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Paper Abstract

A two-beam coupled photorefractive novelty filter is presented for real-time measurement of displacement components. In the optical configuration, the BaTiO3 crystal is oriented such that the spatial phase shift between the dynamic grating and the interference pattern is + π/2. Time evolution of fringe patterns is analyzed. The technique is applied to speckle photography for real-time measurements of displacement components. Experimental results are given.

Paper Details

Date Published: 1 June 1994
PDF: 7 pages
Opt. Eng. 33(6) doi: 10.1117/12.168865
Published in: Optical Engineering Volume 33, Issue 6
Show Author Affiliations
P. R. Sreedhar, Indian Institute of Technology (India)
Nandigana K. Krishna Mohan, Indian Institute of Technology (India)
Rajpal S. Sirohi, Indian Institute of Technology (India)

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