Automatic focusing device

Details Automatic focusing device Automatic focusing device

1989-02-09

1990-10-30

Perkey, W. B.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

2502012, G03B 1336, G02B 728

Patent

active

049672240

ABSTRACT:
An automatic focusing device for a camera is disclosed.
The automatic focusing device has focus detection means for detecting defocus amount of the image, object movement detection means for detecting movement of the object based on defocus data detected by the focus detection means and correction means for correcting the detected defocus amount according to the detected movement of the object.
The objective lens of the camera is driven according to the corrected defocus amount for focus adjustment.

REFERENCES:
patent: 4218119 (1980-08-01), Schickedanz
patent: 4387975 (1983-06-01), Araki
patent: 4434362 (1984-02-01), Wilwerding
patent: 4445761 (1984-05-01), Ishikawa et al.
patent: 4492448 (1985-01-01), Ishikawa et al.
patent: 4503325 (1985-03-01), Araki
patent: 4506150 (1985-03-01), Ogasawara
patent: 4647979 (1987-03-01), Urata

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