Real time image inversion using four-wave mixing

Details Real time image inversion using four-wave mixing Real time image inversion using four-wave mixing

1988-10-11

1990-11-06

Arnold, Bruce Y.

350 385, 35016213, G03H 116, G03H 122, G02B 2746

Patent

active

049681079

ABSTRACT:
An intensity inverter includes an optically nonlinear medium and a reference beam having a uniform transverse intensity distribution and having the same wavelength as the signal beam. The reference beam is directed into the nonlinear medium. A readout beam having the same wavelength as the signal beam and counterpropagating with respect to the reference beam is also directed into the nonlinear medium. When the signal beam is directed into the nonlinear medium, the signal beam and the reference beam interact to form a hologram within the nonlinear medium, thereby diffracting a portion of the readout beam, the undiffracted portion of the readout beam having imposed on it an inversion of the signal.

REFERENCES:
patent: 4025195 (1977-05-01), Ebersole et al.
patent: 4124278 (1978-11-01), Grinberg et al.
patent: 4212536 (1980-07-01), Bencze et al.
patent: 4277137 (1981-07-01), Upatnieks et al.
patent: 4429954 (1984-02-01), Caulfield et al.
patent: 4674824 (1987-06-01), Goodman et al.
patent: 4718749 (1988-01-01), Chiou et al.
Anderson et al., Optical Tracking Novelty Filter, Optics Letters, vol. 12, p. 123 (1987).
Chiou et al., Parallel Image Subtraction Using a Phase-Conjugate Michelson Interferometer, Optics Letters, vol. 11, p. 306 (1986).
Fainman, Optical Digital Logic Operations by Two-Beam Coupling in Photorefractive Material, Applied Optics, vol. 25, p. 1598 (1986).
Indebetouw, Real-Time Incoherent Subtraction of Irradiance, Applied Optics, vol. 19, p. 1218 (1980).
Ja, Real-Time Image Subtraction in Four-Wave Mixing with Photorefractive Bi.sub.120 BeO.sub.20 Crystals, Optics Communications, vol. 42, p. 377 (1982).
Kwong et al., Real Time Image Subtraction and "Exclusive OR" Operation Using a Self-Pumped Phase Conjugate Mirror, Applied Physics Ltrs., vol. 48, p. 201 (1986).
Ochoa, Real-Time Intensity Inversion Using Two-Wave and Four-Wave Mixing in Photorefractive Bi.sub.12 GeO.sub.20, Applied Optics, vol. 24, p. 1826 (6/1985).
Patorski, Subtraction and Addition of Optical Signals Using a Double-Grating Shearing Interferometer, Optics Communications, vol. 29, p. 13 (1979).
Yu et al., Incoherent Image Addition and Subtraction: A Technique, Applied Optics, vol. 18, p. 2705 (1979).

Affiliated with

Also associated with

Rating

Real time image inversion using four-wave mixing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Real time image inversion using four-wave mixing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Real time image inversion using four-wave mixing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1303210