Autofocus apparatus for a camera

Details Autofocus apparatus for a camera Autofocus apparatus for a camera

1990-04-10

1991-10-22

Adams, Jr., Russell E.

354402, G03B 1336

Patent

active

050599992

ABSTRACT:
An autofocus apparatus for a camera which detects the defocus amount of an object image formed by a taking lens and drives the taking lens on the basis of the defocus amount. A movement coefficient correlating the defocus amount and the drive amount of the taking lens is calculated from the defocus amounts detected before and after the drive of the taking lens and the drive amount.

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patent: 4764787 (1988-08-01), Hamada et al.
patent: 4833315 (1989-05-01), Horikawa
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patent: 4908645 (1990-03-01), Higashihara et al.
patent: 4914464 (1990-04-01), Azuma et al.
patent: 4931820 (1990-06-01), Matsuzawa et al.

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