High-speed optical image correlator

Details High-speed optical image correlator High-speed optical image correlator

1995-02-06

1997-02-25

Epps, Georgia Y.

Optical: systems and elements

Diffraction

Using fourier transform spatial filtering

359558, G02B 2746

Patent

active

056064578

ABSTRACT:
An optical image correlator includes a photorefractive medium for recording an interference pattern that corresponds to the Fourier transform of an input image or the multiplicative product of the Fourier transforms of two respective input images. In contrast to correlators of the prior art, the correlator described here includes a semi-insulating, multiple quantum well device as the photorefractive medium.

REFERENCES:
patent: 5004325 (1991-04-01), Glass et al.
patent: 5115335 (1992-05-01), Soref
patent: 5150228 (1992-09-01), Liu et al.
patent: 5311009 (1994-05-01), Capasso
patent: 5394260 (1995-02-01), Suzuki et al.
H. Rajbenbach et al., "Compact photorefractive correlator for robotic applications," App. Opt. 31, 5666-5674 Sep. 1992.
D. T. H. Liu et al., "Real-Time Vanderlugt optical correlator that uses photorefractive GaAs," Appl. Optics 31, 5675-5680 Sep. 1992.
A. Partovi et al., "High sensitivity optical image processing device based on CdZnTe/ZnTe multiple quantum well structures," Appl. Phys. Lett. 59, 1832-1834 Oct. 1991.
A. Partovi et al., "High-speed photodiffractive effect in semi-insulating CdZnTe/ZnTe multiple quantum wells," Opt. Lett. 17, 655-657 May 1992.

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