Single SLM joint transform correaltors

Details Single SLM joint transform correaltors Single SLM joint transform correaltors

1989-04-28

1991-08-13

Smith, Jerry

Boots, shoes, and leggings

382 42, 359561, G06E 300, G02B 2742, G06F 15336

Patent

active

050401408

ABSTRACT:
A simple, low cost, high performance joint Fourier transform correlator, which requires only a single spatial light modulator, is disclosed. Input and reference images are recorded upon a single phase modulating SLM, and a lens produces a first joint Fourier transform of the images upon an electro-optic sensor. The first Fourier transform is binarized and recorded upon the single SLM electronically, and the same lens produces a second Fourier transform to form an image correlation signal at a correlation plane. Also, recordation of the input and reference images and recordation of the joint Fourier transform upon the single SLM may be performed optically rather than electronically.

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