Digital auto focus

Details Digital auto focus Digital auto focus

1976-06-14

1978-03-07

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250209, 354 25, G01J 120

Patent

active

040781712

ABSTRACT:
A digital auto focus system includes first and second detector arrays which receive first and second detection images of an object. The detection images are displaced by a number n of detectors depending upon the distance between the object and the detector arrays. The output signals of the detector arrays are processed to provide a signal indicative of the number n. This signal may be used, for example, to control the position of a lens in a photographic system.

REFERENCES:
patent: 3532045 (1970-10-01), Genahr
patent: 3791735 (1974-02-01), Nakazawa et al.
patent: 3832058 (1974-08-01), Gusovius
patent: 3846628 (1974-11-01), Towne
patent: 3859518 (1975-01-01), Sander
patent: 3875401 (1975-04-01), Stauffer

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