Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1986-04-21
1989-04-18
Griffin, Robert L.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
350 69, 358207, 358231, 455604, 455617, H04B 900
Patent
active
048234028
ABSTRACT:
A beam deflection system for use in optical radar, communications, or optical display apparatus, having the ability to scan multiple "target" clusters that are widely scattered over a large angular field. In its transmission mode of operation, the system switches a laser beam sequentially across an array of focal elements, moving the beam at high speed, since total beam movement across the array is limited to only a few degrees. The system includes an expansion telescope, which expands the succession of beams from the array of focal elements and directs them onto an array of larger, movable optical elements, such as gimbaled mirrors, which direct the successive beams toward scattered target areas in a large angular field. The system also includes a beam scanning device, for "microscanning" the beam through a number of separately resolvable positions within the field of view of each of the array of focal elements.
REFERENCES:
patent: 3615135 (1971-10-01), Frazer
patent: 4297723 (1981-10-01), Whitby
patent: 4574197 (1986-03-01), Kliever
Wolf-"Precision Pointing"-Proceedings of SPIE vol. 150-Laser & Fiber Optic Comm. 1978 pp. 9-14, San Diego Calif.
Mooradian-Atmospheric, Space & Underwater Optical Comm-Proc. of SPIE vol. 150-Laser & Fiber Optic Comm. 1978, pp. 83-91, San Diego Calif.
Beek Leslie Van
Goldstein Sol L.
Griffin Robert L.
Heal Noel F.
TRW Inc.
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