Incoherent erasure joint transform correlator

Details Incoherent erasure joint transform correlator Incoherent erasure joint transform correlator

1996-10-03

2000-10-24

Henry, Jon W.

Optical: systems and elements

Holographic system or element

Having particular recording medium

359 29, 359559, 359561, G03H 102

Patent

active

061376019

ABSTRACT:
A holographic grating is written into a photorefractive erasable holographic member and a light beam having a first wavelength which includes the joint power spectrum of a pair of joint images to be correlated is directed at the photorefractive member to partially erase the grating. A phase conjugate signal from the partially erased grating is then readout and Fourier transformed to produce the correlation output spots.

REFERENCES:
patent: 4674824 (1987-06-01), Goodman et al.
patent: 5337170 (1994-08-01), Khoury et al.
patent: 5493444 (1996-02-01), Khoury et al.
patent: 5604634 (1997-02-01), Khoury et al.
Vainos et al., "Real Time Edge Enhancement by Active Spatial Filtering via Five Wave Mixing in Photorefractive BSO", Optics Communications, vol. 59, No. 3, pp. 167-172, Sep. 1986.

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