Optical crossover network

Details Optical crossover network Optical crossover network

1988-07-15

1990-04-17

Arnold, Bruce Y.

Boots, shoes, and leggings

364200, 370 1, G02B 2714, H04B 900

Patent

active

049174568

ABSTRACT:
A crossover network is obtained by using a plurality of similar optical crossover stages. Each stage includes two light paths that combine at an output plane. One path provides the direct connection while the other path provides the crossover connection. To realize this crossover capability, each stage comprises a beam splitter element that accepts a beam containing an image array and develops therefrom two beams that are each directed in two different paths. Along one path, means are provided for reversal of selected segments of the image array and for sending of the reversed or crossed-over image through a beam combiner. Along the second path, means are provided for applying the light to a beam combiner without the image reversal. One disclosed means for image reversal is a prismatic mirror. The number of corners in such a mirror differs from stage to stage.

REFERENCES:
patent: 4546244 (1985-10-01), Miller
patent: 4708424 (1987-11-01), Marhic
patent: 4811210 (1989-03-01), McAulay
Proceedings of the IEEE, vol. 72, No. 7, Jul. 1984, "Architectural Considerations Involved in the Design of an Optical Digital Computer", A. Huang, pp. 780-786.
IEEE Transactions on Computers, vol. C-20, No. 2, Feb. 1971, "Parallel Processing with the Perfect Shuffle", H. S. Stone, pp. 153-161.
Applied Optics, vol. 27, No. 9, May 1, 1988, "Optical Design of Programmable Logic Arrays", M. J. Murdocca et al, pp. 1651-1660.
VLSI Systems and Computations, Computer Science Press (1981), pp. 186-195, "Compact Layouts of Banyan/FFT Networks", D. S. Wise.

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