Applications of photorefractive polymer to pattern recognition

Won Jae Joo; Chil-Sung Choi; In Kyu Moon; Nakjoong Kim

doi:10.1117/12.452428

5 November 2002 Applications of photorefractive polymer to pattern recognition

Won Jae Joo, Chil-Sung Choi, In Kyu Moon, Nakjoong Kim

Proceedings Volume 4802, Organic Photorefractive and Photosensitive Materials for Holographic Applications; (2002) https://doi.org/10.1117/12.452428
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

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.

Citation Download Citation

Won Jae Joo, Chil-Sung Choi, In Kyu Moon, and Nakjoong Kim "Applications of photorefractive polymer to pattern recognition", Proc. SPIE 4802, Organic Photorefractive and Photosensitive Materials for Holographic Applications, (5 November 2002); https://doi.org/10.1117/12.452428

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