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Proceedings Paper

Applications of photorefractive polymer to pattern recognition
Author(s): Won Jae Joo; Chil-Sung Choi; In Kyu Moon; Nakjoong Kim
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Paper Abstract

The polymeric photorefractive composite was prepared from the mixture of carbazole-substituted polysiloxane as a photoconducting medium, 2, 4, 7-trinitro-9-fluorenone as a photo-sensitizer, and 2-(3-((E)-2-(dibutylamino)-1-ethenyl)-5,5-dimethyl-2-cyclohexenyliden) malononitrile as an optically nonlinear chromophore. This polymeric composite with the thickness of 100 μm exhibited the high diffraction efficiency of 92% at the applied electric field of 30V/μm, which corresponds the refractive index modulation (Δn) of 3 x 10-3. The applications of this polymeric composite to pattern recognition are demonstrated. Character and fingerprint recognitions based on joint-transform optical correlation are successfully demonstrated.

Paper Details

Date Published: 5 November 2002
PDF: 8 pages
Proc. SPIE 4802, Organic Photorefractive and Photosensitive Materials for Holographic Applications, (5 November 2002); doi: 10.1117/12.452428
Show Author Affiliations
Won Jae Joo, Hanyang Univ. (South Korea)
Chil-Sung Choi, Hanyang Univ. (South Korea)
In Kyu Moon, Hanyang Univ. (South Korea)
Nakjoong Kim, Hanyang Univ. (South Korea)

Published in SPIE Proceedings Vol. 4802:
Organic Photorefractive and Photosensitive Materials for Holographic Applications
Klaus Meerholz, Editor(s)

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