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Application of parallel-aligned nematic liquid crystal spatial-light modulator (PAL-SLM) to optical joint transform correlator

Tsutomu Hara, Yuji Kobayashi, Haruyoshi Toyoda, Naohisa Mukohzaka, Narihiro Yoshida, Yasuhiro Igasaki

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Abstract

We have developed a compact joint transform correlator by using the parallel aligned nematic liquid crystal spatial light modulator as a real time hologram device, and have applied the correlator to fingerprint identification. The identification performance was evaluated using 2400 data from 600 fellow workers. The test results showed that the false-reject rate was 0.2 percent with 0.2 percent false acceptance. The response time of the system was less than 0.1 seconds as a result of parallel processing in the optical system.

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What this paper is about

We have developed a compact joint transform correlator by using the parallel aligned nematic liquid crystal spatial light modulator as a real time hologram device, and have applied the correlator to fingerprint identification. The identification performance was evaluated using 2400 data from 600 fellow workers. The test results showed that the false-reject rate was 0.2 percent with 0.2 percent false acceptance. The response time of the system was less than 0.1 seconds as a result of parallel processing in the optical system.

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Available abstract

We have developed a compact joint transform correlator by using the parallel aligned nematic liquid crystal spatial light modulator as a real time hologram device, and have applied the correlator to fingerprint identification. The identification performance was evaluated using 2400 data from 600 fellow workers. The test results showed that the false-reject rate was 0.2 percent with 0.2 percent false acceptance. The response time of the system was less than 0.1 seconds as a result of parallel processing in the optical system.

Key concepts: Spatial light modulator, Liquid crystal, Optical correlator, Holography, Joint (building), Optics, Materials science, Liquid-crystal display

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Application of parallel-aligned nematic liquid crystal spatial-light modulator (PAL-SLM) to optical joint transform correlator — Research Paper | ScholarLens