Automatic focus adjustment camera with high speed sequential pho

Details Automatic focus adjustment camera with high speed sequential pho Automatic focus adjustment camera with high speed sequential pho

1994-12-21

1996-12-31

Perkey, W. B.

Photography

With exposure objective focusing means, focusing aid, or...

Having accumulation photoarray and time control means

396128, G03B 1336

Patent

active

055899099

ABSTRACT:
During normal photographic operation, an image of a target object to be photographed is formed from a ray bundle from it which has passed through a photographic optical system, and is then converted into target object image data in correspondence to the distribution of intensity of illumination therein. Then a first calculation process is performed upon the target object image data to detect the focus adjustment state of the photographic optical system, and the photographic optical system is driven based upon the thus detected focus adjustment state. On the other hand, during sequential photographic operation, instead of this first calculation process, a second and different calculation process is performed upon the target object image data to detect the focus adjustment state of the photographic optical system, and the photographic optical system is driven based upon the thus detected focus adjustment state. The scope of the second calculation process may desirably be less than the scope of the first calculation process.

REFERENCES:
patent: 4459006 (1984-07-01), Sakai et al.
patent: 4523829 (1985-06-01), Eguchi et al.
patent: 4561749 (1985-12-01), Utagawa
patent: 4573784 (1986-03-01), Suzuki
patent: 4792668 (1988-12-01), Akashi et al.
patent: 4831403 (1989-05-01), Ishida et al.
patent: 5053799 (1991-10-01), Akashi

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