Telegraphy – Systems – Simplex-reversing periodic
Patent
1969-07-28
1976-10-26
Britton, Howard W.
Telegraphy
Systems
Simplex-reversing periodic
178DIG21, H04N 718
Patent
active
039885348
ABSTRACT:
A television camera is trained on a target to produce a video image thereof. The video signals are converted to unipolar form such that black to white and white to black contrast produces the same polarity video signals and these signals appropriately filtered so that only the desired target signals remain. A tracking gate is generated which automatically accommodates to the size of the selected target and forms an optical window which surrounds the target on a viewing screen. In an acquisition mode of operation, the operator brings the target so that it lies within the window at which time he initiates a "track" mode of operation whereupon error signals are generated as the target moves out of the window, these error signals being utilized in a servo system to slew the camera such as to maintain "lock-on".
REFERENCES:
patent: 2970187 (1961-01-01), Hinton
patent: 3043907 (1962-07-01), Martin
patent: 3257505 (1966-06-01), Van Wechel
patent: 3578904 (1971-05-01), Dewey et al.
patent: 3728478 (1973-04-01), Turner et al.
Lowenstein--A Television System With Automatic Target Tracking Capability--SMPTE--vol. 76--Dec. 1967--pp. 1189-1192.
Britton Howard W.
Northrop Corporation
Sokolski Edward A.
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