Optical Image Processing : Spatial Filtering by Photorefractive Materials

H.W. Li; J. Gazengel; N.P. Xuan; J.L. Ferrier; J.P. Bourdin; G. Rivoire

doi:10.1364/PMED.1990.JP5

Topical Meeting on Photorefractive Materials, Effects, and Devices II
Technical Digest Series (Optica Publishing Group, 1990),
paper JP5
•https://doi.org/10.1364/PMED.1990.JP5

Optical Image Processing : Spatial Filtering by Photorefractive Materials

H.W. Li, J. Gazengel, N.P. Xuan, J.L. Ferrier, J.P. Bourdin, and G. Rivoire

Photorefractive Materials, Effects, and Devices II 1990

Aussois France
17–19 January 1990
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Beam coupling Applications (JP)

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H. W. Li, J. Gazengel, N. P. Xuan, J. L. Ferrier, J. P. Bourdin, and G. Rivoire, "Optical Image Processing : Spatial Filtering by Photorefractive Materials," in Topical Meeting on Photorefractive Materials, Effects, and Devices II, Technical Digest Series (Optica Publishing Group, 1990), paper JP5.

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Abstract

The nonlinearities of photorefractive materials such as Fe:LiNbO₃, BSO, BGO,… are used to filter the Fourier spectrum of an object. Image processing techniques, such as contrast inversion or contrast enhancement of amplitude objects, and phase objects visualization are thus obtained with simple optical devices and low power cw lasers.

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