Camera focus detector

Details Camera focus detector Camera focus detector

1990-12-17

1992-08-11

Adams, Russell E.

354402, G03B 1336

Patent

active

051383608

ABSTRACT:
A camera focus detector employs an array of photoelectric converting elements arranged in correspondence to a plurality of regions of a photographic frame. Focus-detecting signals are obtained by processing signals output from the photoelectric converting elements. A ROM stores those focus-detecting signals which correspond to at least two regions and which are obtained when the distance to a subject has a predetermined relationship with the letting state of a photographing lens. The focus-detecting signals corresponding to arbitrary regions of the photographic frame are corrected, using the data read out of the ROM. The photographing lens is driven to its focusing position on the basis of the corrected focus-detecting signals.

REFERENCES:
patent: 4264810 (1981-04-01), Utagawa et al.
patent: 4560863 (1985-12-01), Matsumura et al.
patent: 4563576 (1986-01-01), Matsumura et al.
patent: 4748321 (1988-05-01), Ishida et al.
patent: 4768052 (1988-08-01), Hamada et al.
patent: 4904854 (1990-02-01), Ishida et al.

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