Continuous focus proportional controller

Details Continuous focus proportional controller Continuous focus proportional controller

1977-06-06

1978-08-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250204, G01V 120

Patent

active

041075200

ABSTRACT:
An automatic continuous focus system of the spatial image correlation type determines whether focus correction is needed and in which direction and moves the lens with a proportional drive in accordance with these determinations.

REFERENCES:
patent: 3764213 (1973-10-01), O'Meara
patent: 3838275 (1974-09-01), Stauffer

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