Optoelectronic associative memory

Details Optoelectronic associative memory Optoelectronic associative memory

1991-08-19

1993-11-16

Popek, Joseph A.

Static information storage and retrieval

Associative memories

Ferroelectric cell

365215, 359561, 382 42, G11C 1500

Patent

active

052629791

ABSTRACT:
An associative optical memory including an input SLM in the form of an edge enhanced LCLV and a pair of memory SLMs in the form of LCTVs forms a matrix array of an input image which is cross correlated with a matrix array of stored images. The correlation product is detected and non-linearly amplified to illuminate a replica of the stored image array to select the stored image correlating with the input image. The LCLV is edge enhanced by reducing the bias frequency and voltage and rotating its orientation. The edge enhancement and non-linearity of the photodetection improves the orthogonality of the stored images. The illumination of the replicate stored image provides a clean stored image, uncontaminated by the image comparison process.

REFERENCES:
patent: 3949235 (1976-04-01), Miyazaki et al.
patent: 4076370 (1978-02-01), Wako
patent: 4637055 (1987-01-01), Taylor
patent: 4715683 (1987-12-01), Gregory et al.
patent: 4743097 (1988-05-01), Johnson et al.
patent: 4772101 (1988-09-01), Liu
patent: 4804250 (1989-02-01), Johnson
patent: 4809340 (1989-02-01), Mersereau
patent: 4837843 (1989-06-01), Owechko
patent: 4860253 (1989-08-01), Owechko et al.
patent: 4862406 (1989-08-01), Fisher
patent: 4908702 (1990-03-01), Chao et al.
patent: 4924507 (1990-05-01), Chao et al.
patent: 4961615 (1990-10-01), Owechko et al.
patent: 4972348 (1990-11-01), Ishikawa et al.
patent: 4974202 (1990-11-01), Mukohzaka
patent: 5131055 (1992-07-01), Chao
Yaser S. Abu-Mostafa & Demetri Psaltis, "Optical Neural Computers", Scientific American, vol. 256 No. 3, Mar., 1987, pp. 88-95.
Eung Gi Paek, Demetri Psaltis, "Optical associative memory using Fourier transform holograms", Optical Engineering, vol. 26, No. 5, May 1987, pp. 428-433.
Tien-Hsin Chao, "Real time optical edge enhancement using a Hughes liquid crystal light valve", Applied Optics, vol. 28, No. 22, Nov. 1989, pp. 4727-4731.

Affiliated with

Also associated with

Rating

Optoelectronic associative memory does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optoelectronic associative memory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optoelectronic associative memory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-26694