Communications: radio wave antennas – Antennas – Plural separate diverse type
Patent
1979-06-11
1981-08-04
Lieberman, Eli
Communications: radio wave antennas
Antennas
Plural separate diverse type
343781CA, 343 6ND, 350 9610, 350 9618, H01Q 2128, G02B 516
Patent
active
042825270
ABSTRACT:
A multi-spectral detection system for detecting radiation within frequency bands that are in diverse portions of the electromagnetic spectrum is disclosed. The preferred embodiment is a Cassegrain system including a primary reflector for reflecting radiant energy in the radio frequency and infrared portions of the electromagnetic spectrum; a subreflector positioned along the axis of the primary reflector for re-reflecting the radiant energy reflected from the primary reflector toward the primary reflector and focusing the re-reflected radiant energy in a common focal plane about the system axis; a feed horn coaxially positioned at the common focal plane and having an entrance in the common focal plane about the system axis for transferring the collected radio frequency radiant energy from the focal plane to a detector of radio frequency radiant energy; and a bundle of optical fibers coaxially positioned at the common focal plane and having openings in the common focal plane about the system axis for transferring collected infrared radiant energy from the focal plane to a detector of infrared radiant energy. A baffle is coaxially positioned for blocking light other than the re-reflected infrared radiation from being received and transferred by the optical fibers.
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Kuffer Fernand B.
Winderman Jay B.
Baker Freling E.
General Dynamics Pomona Division
Johnson Edward B.
Lieberman Eli
Martin Neil F.
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