Focus system for movie cameras

Details Focus system for movie cameras Focus system for movie cameras

1976-10-01

1977-11-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250204, 354 25, 356 4, G01J 120

Patent

active

040597571

ABSTRACT:
An automatic continuous focus system of the spatial image correlation type uses a dual scan technique.

REFERENCES:
patent: 3736057 (1973-05-01), Harvey
patent: 3967110 (1976-06-01), Rogers et al.
patent: 4004852 (1977-01-01), Pentecost
patent: 4011446 (1977-03-01), Swanberg

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