Light actuated optical logic device

Details Light actuated optical logic device Light actuated optical logic device

1990-10-25

1992-04-28

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

359108, H01J 3150

Patent

active

051091569

ABSTRACT:
A light activated AND gate is disclosed which generates a light signal at a first output port in response to the simultaneous presence of light signals at an input port and a control port. With a light signal present at the control port, a light beam at the input port is reflected from an interface between two regions having different indices of refraction, and the reflected light beam then exits through a first output port. In the absence of a light signal at the control port, the two regions of the switching device have the same index of refraction, and the light beam at the input port passes through both regions and exits through a second output port.

REFERENCES:
patent: 4767196 (1988-08-01), Jewell
patent: 4776658 (1988-10-01), Normandin
patent: 4887877 (1989-12-01), Inoue et al.
patent: 4900134 (1990-02-01), Inoue et al.
patent: 4941725 (1990-07-01), Normandin
patent: 4978842 (1990-12-01), Hinton et al.
patent: 4992654 (1991-02-01), Crossland et al.
patent: 4999486 (1991-03-01), Falk

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