A simple method for image subtraction by two-wave mixing in photorefractive cubic Bi12 TiO20 crystals is proposed and demonstrated. Intensity inversion and edge enhancement are also achieved.
© 1991 Optical Society of America
Original Manuscript: October 22, 1990
Published: May 15, 1991
S. Zhivkova and M. Miteva, "Image subtraction using fixed holograms in photorefractive Bi12TiO20 crystals," Opt. Lett. 16, 750-751 (1991)