Automatic focusing system of photographic camera

Details Automatic focusing system of photographic camera Automatic focusing system of photographic camera

1983-12-12

1986-02-18

Perkey, William B.

G03B 300

Patent

active

045710481

ABSTRACT:
An automatic focusing system of a photographic camera has a distance measuring device (10) for scanning a predetermined photographic range for producing a distance signal representing the distance from a film plane to the photographic subjects. During the scanning, a value of the distance signal corresponding to the nearest photographic subject is detected and held by a memory (18). The photographic lens is adjusted in accordance with the value held by the memory so as to focus an image of the nearest photographic subject. The automatic focusing system enables the user to take well focused photographs of desired composition by simple operations.

REFERENCES:
patent: 4103152 (1978-07-01), Stauffer
patent: 4425031 (1984-01-01), Tamura et al.
patent: 4470681 (1984-09-01), Johnson

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