5 November 2002 Applications of photorefractive polymer to pattern recognition
Author Affiliations +
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.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Won Jae Joo, Won Jae Joo, Chil-Sung Choi, Chil-Sung Choi, In Kyu Moon, In Kyu Moon, Nakjoong Kim, Nakjoong Kim, } "Applications of photorefractive polymer to pattern recognition", Proc. SPIE 4802, Organic Photorefractive and Photosensitive Materials for Holographic Applications, (5 November 2002); doi: 10.1117/12.452428; https://doi.org/10.1117/12.452428

Back to Top