Title:
【発明の名称】自動焦点調節装置
Document Type and Number:
Japanese Patent JP2821214
Kind Code:
B2
Abstract:
An automatic focus adjusting device comprising extracting circuitry for extracting a focus signal from an image sensor corresponding to the degree of focusing of an image sensing signal output from the sensor, a drive device for adjusting focus so as to bring an optical system into a focuses state on the basis of the focus signal and a control unit operative to detect a magnification varying operation of the optical system for controlling a loop gain of a closed loop encompassing the image sensor, the extracting circuitry and the drive device.
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Inventors:
Hiroshi Suda
Arai Hideyuki
Kanada Hokuyo
Arai Hideyuki
Kanada Hokuyo
Application Number:
JP32928889A
Publication Date:
November 05, 1998
Filing Date:
December 18, 1989
Export Citation:
Assignee:
Canon Inc
International Classes:
H04N5/232; G02B7/28; (IPC1-7): H04N5/232
Domestic Patent References:
| JP63202186A | ||||
| JP62284318A | ||||
| JP6261479A | ||||
| JP61214869A |
Attorney, Agent or Firm:
Giichi Marushima (1 person outside)