Real time optical computing and image processing using self-pump

Details Real time optical computing and image processing using self-pump Real time optical computing and image processing using self-pump

1986-06-16

1988-08-09

LaRoche, Eugene R.

350173, 350174, 350354, 350385, 350393, G02B 523, G02B 101, G02B 2714, G02B 530

Patent

active

047623942

ABSTRACT:
Real time "exclusive or" operation, image subtraction, intensity inversion, and first- and second-order differentiation is achieved by an interferometer with a phase conjugate mirror for retroreflection of two or more beams derived from a single beam by a beam splitter and recombined interferometrically by the beam splitter.

REFERENCES:
patent: 4632518 (1986-12-01), Jensen
Jeffrey O. White and Amnon Yariv, "Real-Time Image Processing via Four-Wave Mixing in a Photorefractive Medium", Appl. Phys. Lett., vol. 37, No. 1, Jul. 1980, pp. 6-8.
Jack Feinberg, "Real-Time Edge Enhancement Using the Photorefractive Effect," Optics Letters, vol. 5, No. 8, Aug. 1980, pp. 330-332.
Y. H. Ja, "Real-Time Image Subtraction in Four-Wave Mixing with Photorefractive Bi.sub.12 GeO.sub.20 Crystals", Opt. Comm., vol. 42, No. 6, 15 Aug. 1982, pp. 337-380.
E. Ochoa, L. Hesselink, & J. Goodman, "Real-Time Intensity Inversion Using Two-Wave and Four-Wave Mixing in Photorefractive Bi.sub.12 GEO.sub.20," Appl. Optics, vol. 24, No. 12, 15 Jun. 1985, pp. 1826-1832.
Y. H. Ja, "Real-Time Optical Image Differentiation by Degenerate Four-Wave Mixing," Appl. Phys. B, vol. 36, 1985, pp. 21-24.
M. Ewbank, P. Yah, M. Khoshnevisan & J. Feinberg, "Time Reversal by an Interferometer with Coupled Phase-Conjugate Reflectors," Optics Letters, vol. 10, No. 6, Jun. 1985, pp. 282-284.
A. Chiou and P. Yeh, "Parallel Image Subtraction Using a Phase-Conjugate Michelson Interferometer," Optics Letters, vol. 11, No. 5, May 1986, pp. 306-308.

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