Remote lens focusing system for an aerial camera

Details Remote lens focusing system for an aerial camera Remote lens focusing system for an aerial camera

1980-07-14

1983-03-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

318602, G01D 534

Patent

active

043777449

ABSTRACT:
A system for remotely controlled focusing of a reconnaisance camera instad on an aircraft. The camera can be focused to any of a plurality of pre-selected focused position, each position having a unique corresponding binary coded decimal designator generated from a position correlated switch. When a change in focus is selected by depression of a push button switch, the resulting binary coded decimal designator for the desired focus position is added to the binary coded decimal designator from the optical switch. Differences between the two designators will cause a scanner to rotate and scan all optical switches, while simultaneously a gear mechanism adjusts the camera lens focus position to the position corresponding to that for the switch scan at that increment of time. When the scanner locates the activated switch whose binary coded decimal designator is the same as the designator of the selected pushbutton, scanning and focusing adjustments are halted.

REFERENCES:
patent: 3670228 (1972-06-01), Crosby
patent: 4078171 (1978-03-01), Stauffer
patent: 4090069 (1978-05-01), Lisfeld et al.
patent: 4109188 (1978-08-01), Shima et al.
patent: 4251144 (1981-02-01), Matsuda et al.

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