Real-time speckle photography with two-wave mixing in photorefractive BaTi03 crystals

P. R. Sreedhar; Nandigana K. Krishna Mohan; Rajpal S. Sirohi

doi:10.1117/12.168865

1 June 1994 Real-time speckle photography with two-wave mixing in photorefractive BaTi03 crystals

P. R. Sreedhar, Nandigana K. Krishna Mohan, Rajpal S. Sirohi

Author Affiliations +

Optical Engineering, Vol. 33, Issue 6, (June 1994). https://doi.org/10.1117/12.168865

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.

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P. R. Sreedhar, Nandigana K. Krishna Mohan, and Rajpal S. Sirohi "Real-time speckle photography with two-wave mixing in photorefractive BaTi03 crystals," Optical Engineering 33(6), (1 June 1994). https://doi.org/10.1117/12.168865

Published: 1 June 1994

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