Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
AUTOFOCUSING CAMERA
Document Type and Number:
Japanese Patent JP3679693
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide an autofocusing camera performing autofocusing operation by detecting the high-band component level of an image pickup video signal obtained from an imaging device as a focus evaluated value, and making time required to attain focusing short.
SOLUTION: This camera is equipped with a moving means to move a focus lens along an optical axis so that a movement completing position may be an autofocusing start position, a search means to obtain the focus evaluated value of every step by moving the focus lens in a reverse direction to a moving direction by the moving means by specified steps from the autofocusing start position, a focusing means to move the focus lens to a focusing position in response to relation between the position of the focus lens and the focus evaluated value obtained by the search means, and a moving distance restricting means to detect the focus evaluated value at the time of starting the operation of the moving means so as to make a moving distance by the moving means shorter according as the value is larger.


Inventors:
Kenichi Kikuchi
Kazuhiko Sugimoto
Application Number:
JP2000232196A
Publication Date:
August 03, 2005
Filing Date:
July 31, 2000
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
G03B13/36; G02B7/09; G02B7/10; G02B7/28; G02B7/36; G03B19/02; H04N5/232; (IPC1-7): G02B7/28; G02B7/36; G03B13/36; G03B19/02; H04N5/232
Domestic Patent References:
JP2001255457A
JP2000105332A
JP2114774A
JP9133854A
JP2000147368A
JP10048511A
JP10048512A
JP57197524A
JP5308557A
JP59102204A
Attorney, Agent or Firm:
Masamasa Shibano