Automatic focus adjusting apparatus of a camera

Details Automatic focus adjusting apparatus of a camera Automatic focus adjusting apparatus of a camera

1990-02-14

1991-04-02

Perkey, W. B.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

2502012, G03B 1336, G02B 728

Patent

active

050050400

ABSTRACT:
An automatic focus adjusting apparatus of a camera comprises three CCD sensors receiving light from an object, a focus detecting apparatus for outputting a focus signal indicative of the focusing state of a photographic lens based on output data from the respective CCD sensors, a calculating apparatus for calculating an amount of driving the photographic lens based on the focus signal, a selector for selecting one of the three CCD sensors, a correcting apparatus for correcting the amount of driving calculated based on the output data from the selected CCD sensor, and a driving apparatus for driving the photographic lens to an in-focus position based on the corrected driving amount. An error in foucs detection incidental to the driving of the lens can be corrected based only on the data from one CCD sensor selected by a selector, so that the focusing error on a moving object can be eliminated in a simple manner.

REFERENCES:
patent: 4334150 (1982-06-01), Herbst et al.
patent: 4387975 (1983-06-01), Araki
patent: 4492448 (1985-01-01), Ishikawa et al.
patent: 4563708 (1986-01-01), Ishibashi
patent: 4636624 (1987-01-01), Ishida et al.
patent: 4768052 (1988-08-01), Hamada et al.
patent: 4831403 (1989-05-01), Ishida et al.

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