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Proceedings Paper

Edge enhancement in photorefractive polymer
Author(s): Kenji Matsushita; Daisuke Miyazaki; Seigo Ozaki; Partha P. Banerjee; Mikhail A. Vorontsov; Esam Gad
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Paper Abstract

The characteristics of photorefractive polymer doped with PNP in optical image processing are investigated. PNP[(S)-(-)- N-(5-nitro-2-pyridyl)prolinol] is one of the high gain chromophore in polymeric photorefractive system. In the two wave coupling experiment, the gain coefficient about 180 is observed with 25 micron thick sample at 100 V/micrometer. Higher diffraction order and phase conjugation is also observed. This photorefractive thin film is used as a holographic recording device. Fourier transform hologram is recorded by using similar arrangement of two wave coupling configuration. The reconstructed image from the photorefractive film is edge-enhanced. Degree of enhancement depends on the intensity ratio of signal to pump beam. Decreasing the ratio of signal to pump beam, degree of edge enhancement decreases. When the object pattern is defocused on the film, degree of enhancement also decreases. Optical image processing system in which degree of edge enhancement is controllable can be constructed.

Paper Details

Date Published: 20 September 1999
PDF: 4 pages
Proc. SPIE 3801, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications V, (20 September 1999); doi: 10.1117/12.363932
Show Author Affiliations
Kenji Matsushita, Osaka City Univ. (Japan)
Daisuke Miyazaki, Osaka City Univ. (United States)
Seigo Ozaki, Osaka City Univ. (Japan)
Partha P. Banerjee, Univ. of Alabama in Huntsville (United States)
Mikhail A. Vorontsov, Univ. of Alabama in Huntsville (United States)
Esam Gad, Univ. of Alabama in Huntsville (United States)


Published in SPIE Proceedings Vol. 3801:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications V
Francis T. S. Yu; Shizhuo Yin, Editor(s)

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