Accession Number:

ADD005494

Title:

Spatial-Multiplex, Spatial-Diversity Optical Communication Scheme.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE ARMY WASHINGTON D C

Report Date:

1978-04-18

Pagination or Media Count:

12.0

Abstract:

An optical communications system for coding, transmitting, receiving, and decoding digital message signals is described. A beam from a coherent optical source, such as a laser, is transmitted through an aperture in which there is disposed a random phase screen, e.g., ground glass. One or more isometric bar gratings containing the coded message data in a particular amplitude distribution pattern are disposed adjacent to the ground glass in the optical transmission path. The ground glass, phase screen, introduces a random coding to the message bit. At the receiver a plurality of point detectors sense the signals to facilitate subsequent decoding of the message. Author

Subject Categories:

  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE