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

Speckle

Photography

Laser crystals

Ferroelectric materials

Fringe analysis

Modulation

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