[OPTICAL REVIEW Vol. 1, No. 2 (1994) 159-162]

Hybrid Binary Subtracted Joint Transform Correlator for a Large Number of Reference Patterns Using a Bi12SiO20 (BSO) Spatial Light Modulator and a Laser Scanner

Yukihisa OSUGI,1 Qiong ZHAN2 and Takumi MINEMOTO3

1Corporate Research and Development Group, NGK Insulators, Ltd., Suda-cho, Mizuho-ku, Nagoya, 467 Japan, 2Graduate School of Science and Technology, 3Department of System Science, Kobe University, Nada-ku, Kobe, 657 Japan

(Accepted September 6, 1994)

A hybrid binary subtracted joint transform correlator was constructed using a Bi12SiO20 (BSO) spatial light modulator and a laser scanner. The usefulness of this system was confirmed experimentally using a large number of binary and half-tone images as the reference patterns.

Key words : optical processing, joint transform correlation, Fourier transformation, spatial light modulator, laser