Beam fanning in the photorefractive crystal of Ba2NaNb5O15

S. V. Ivanova

doi:10.1117/12.2308866

23 July 1993 Beam fanning in the photorefractive crystal of Ba₂NaNb₅O₁₅

S. V. Ivanova

Author Affiliations +

Proceedings Volume 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology; 1983CF (1993) https://doi.org/10.1117/12.2308866
Event: 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 1993, Budapest, Hungary

Abstract

Addition fringes are obtained in real time from Electronic Speckle Pattern Interferometry (ESPI) using a twin-pulsed laser, when two pulses are fired during a single frame of a CCD camera. However, the fringe patterns have poor visibility, because optical noise is reinforced. Automatic phase extraction from addition fringes has not previously been achieved: low-pass filtering to suppress random speckle noise also eliminates the fringes due to their low visibility. Two procedures to calculate phase from ESPI addition fringes are presented in this paper. This has enabled phase to be extracted from ESPI addition fringes for the first time.

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S. V. Ivanova "Beam fanning in the photorefractive crystal of Ba₂NaNb₅O₁₅", Proc. SPIE 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 1983CF (23 July 1993); https://doi.org/10.1117/12.2308866

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