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2 March 2001 Photorefractive four-wave mixing for optical image restoration
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We describe an optical image restoration by using holographic filtering and photorefractive four-wave mixing. A beam generated by four-wave mixing, that is, the phase conjugate beam, reads a hologram recorded by a blurred image and blur function, where the four-wave mixing process is influenced by an erase beam which has the information of the blur function. We calculate the generation efficiency of the phase conjugate beam and show that the amplitude of the phase conjugate beam can be inversely proportional to the intensity of the erase beam. We also simulate the image restoration by preparing sample images and show that the blur effect can be removed from the distorted image by this method.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yoshihisa Takayama, Atsushi Okamoto, and Kenichi Araki "Photorefractive four-wave mixing for optical image restoration", Proc. SPIE 4353, Laser Optics 2000: Control of Laser Beam Characteristics and Nonlinear Methods for Wavefront Control, (2 March 2001);


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