1 January 1991 Optical testing by dynamic holographic interferometry with photorefractive crystals and computer image processing
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Abstract
The structure and operation o a holographic intererometer that employs photorefractive crystals (o the sillenite Family) as reusable recording materials and computer image processing or rapid and precise interpretation o the fringe patterns are discussed. Different types of two-wave mixing (2WM) and four-wave mixing (4VM) were applied to optical testing by timeaverage and double..exposure hoaographic intererometry. A very convenient matching was found in the setup or the BTO crystals and usual Re—Ne lasers, when the exposures were o r.lOs or light energy densities o 4 x lO" W/cm2.
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Ionel Valentin Vlad, Ionel Valentin Vlad, Dragos Popa, Dragos Popa, M. P. Petrov, M. P. Petrov, Alexei A. Kamshilin, Alexei A. Kamshilin, } "Optical testing by dynamic holographic interferometry with photorefractive crystals and computer image processing", Proc. SPIE 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection, (1 January 1991); doi: 10.1117/12.51074; https://doi.org/10.1117/12.51074
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