Automatic focus control device

Details Automatic focus control device Automatic focus control device

1989-06-28

1990-05-08

Adams, Russell E.

3541951, 354400, G03B 300

Patent

active

049242504

ABSTRACT:
In an automatic focus control device of a camera there are provided defocus amount calculation means for calculating a defocus amount for a predetermined focus plane of a photographic lens in the camera on the basis of the electric signal generated by a light receiving means, comparing means for comparing the obtained value on the basis of the calculated defocus amount with a reference value, control means controlling driving speed of the photographic lens by the lens driving means in response to the comparison result of a comparing means, photographic condition setting means for setting the photographic condition and reference value setting means for setting said reference value in response to the set photographic condition.

REFERENCES:
patent: 3820120 (1974-06-01), Hosoe et al.
patent: 4309098 (1982-01-01), Shenk
patent: 4405220 (1983-09-01), Kusaka et al.
patent: 4459006 (1984-07-01), Sakai et al.
patent: 4466726 (1984-08-01), Nakajima
patent: 4469417 (1984-09-01), Masunaga et al.
patent: 4470683 (1984-09-01), Nakajima
patent: 4475800 (1984-10-01), Kinoshita et al.
patent: 4509842 (1985-04-01), Taniguchi et al.
patent: 4538892 (1985-09-01), Sakai et al.
patent: 4545665 (1985-10-01), Aihara
patent: 4550993 (1985-11-01), Taniguchi et al.
patent: 4572642 (1986-02-01), Yamamoto et al.
patent: 4609274 (1986-09-01), Iwashita et al.
patent: 4613224 (1986-09-01), Ogasawara
patent: 4671640 (1987-06-01), Akada et al.

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