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

Takeshi Takahashi; Yukihiro Ishii

doi:10.1117/12.483222

16 September 2002 Phase-shifting joint transform correlator with a wavelength-shifted laser diode

Takeshi Takahashi, Yukihiro Ishii

Proceedings Volume 4929, Optical Information Processing Technology; (2002) https://doi.org/10.1117/12.483222
Event: Photonics Asia, 2002, Shanghai, China

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.

Citation Download Citation

Takeshi Takahashi and Yukihiro Ishii "Phase-shifting joint transform correlator with a wavelength-shifted laser diode", Proc. SPIE 4929, Optical Information Processing Technology, (16 September 2002); https://doi.org/10.1117/12.483222

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