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Proceedings Paper

Spectrum-enhanced correlator by two-wave mixing in a photorefractive crystal
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Paper Abstract

A real-time spectrum-enhanced correlator has been constructed to improve the correlation performance. The system in a photorefractive BaTiO3 two-wave mixing plays a role to enhance the optical spectrum of an input object at a Fourier domain by changing the pump beam intensity. Coherent enhancement together with a phase-only filter can be achieved a good correlation performance. The character-recognition experiments with the system are shown.

Paper Details

Date Published: 7 May 1999
PDF: 4 pages
Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); doi: 10.1117/12.347791
Show Author Affiliations
Takeshi Takahashi, Univ. of Industrial Technology (Japan)
Yukihiro Ishii, Univ. of Industrial Technology (Japan)


Published in SPIE Proceedings Vol. 3740:
Optical Engineering for Sensing and Nanotechnology (ICOSN '99)
Ichirou Yamaguchi, Editor(s)

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