Abstract

We demonstrate a technique by which components of an image moving with a given speed and direction may be selectively enhanced. By using the strong grating velocity sensitivity of the nonlinear photorefractive response, we show that a BSO crystal used in a schlieren imaging system may be used as a real-time velocity filter. The velocity selectivity, tunability and resolution constraints of this system are discussed in detail.

© 1988 Optical Society of America

Selective enhancement of spatial harmonics of a photorefractive grating

Frederick Vachss and Lambertus Hesselink
J. Opt. Soc. Am. B 5(8) 1814-1821 (1988)

Optical correlators with fast updating speed using photorefractive semicondutor materials

Gregory Gheen and Li-Jen Cheng
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Optical surface inspection using real-time Fourier transform holography in photorefractives

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