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Proceedings Paper

Phase-shifting joint transform correlator with a wavelength-shifted laser diode
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Paper Abstract

A joint-transform phase correlator is presented for processing multiple-pattern recognition that uses the six-step phaseshifting interferometer with a wavelength-shifted laser diode. The correlation peaks are obtained by the numerical Fourier transformation of a measured phase in an on-axis joint power spectrum. Multiple-pattern phase correlation can be performed to demonstrate high discrimination without the intermodulation owing to zero optical path differences between multiple targets in the interferometer. The experimental results are shown.

Paper Details

Date Published: 16 September 2002
PDF: 13 pages
Proc. SPIE 4929, Optical Information Processing Technology, (16 September 2002); doi: 10.1117/12.483222
Show Author Affiliations
Takeshi Takahashi, Univ. of Industrial Technology (Japan)
Yukihiro Ishii, Univ. of Industrial Technology (Japan)

Published in SPIE Proceedings Vol. 4929:
Optical Information Processing Technology
Guoguang Mu; Francis T. S. Yu; Suganda Jutamulia, Editor(s)

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