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
Original Manuscript: October 23, 1987
Published: July 15, 1988
Frederick Vachss and Lambertus Hesselink, "Synthesis of a holographic image velocity filter using the nonlinear photorefractive effect," Appl. Opt. 27, 2887-2894 (1988)