Photorefractive two-beam coupling nonlinear joint transform corr

Optical: systems and elements – Diffraction – Using fourier transform spatial filtering

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

359 7, 359561, 364822, 382210, G02B 2742, G02B 2746, G06E 300, G06K 976

Patent

active

054934443

ABSTRACT:
An all-optical nonlinear joint transform correlator has been implemented for the first time without using a spatial light modulator and digital processing in the Fourier plane. The correlator utilizes energy transfer from two-beam coupling in the Fourier plane. A compressional nonlinearity in the hard-clipped regime is implemented by pumping a weak plane wave with the intense joint spectrum of the reference and signal images. Operation of this device rivals or exceeds that of the phase-only filter for detecting objects in cluttered noise. Experimental results are compared with both plane wave and beam propagation simulations.

REFERENCES:
patent: 4695973 (1987-09-01), Yu
patent: 4832447 (1989-05-01), Javidi
patent: 5005927 (1991-04-01), Cudney et al.
patent: 5107351 (1992-04-01), Leib et al.
patent: 5119443 (1992-06-01), Javidi et al.
patent: 5150228 (1992-09-01), Liu et al.
patent: 5282067 (1994-01-01), Liu
patent: 5337170 (1994-08-01), Khoury et al.
patent: 5367579 (1994-11-01), Javidi et al.
Bahram Javidi, "Nonlinear joint power spectrum based optical correlation", Applied Optics, vol. 28, No. 12, 15 Jun. 1989, pp. 2358-2367.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Photorefractive two-beam coupling nonlinear joint transform corr does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photorefractive two-beam coupling nonlinear joint transform corr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photorefractive two-beam coupling nonlinear joint transform corr will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1360690

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.