Title:
【発明の名称】焦点検出装置
Document Type and Number:
Japanese Patent JP2572372
Kind Code:
B2
Abstract:
An automatic focal point control apparatus for optical equipment such as cameras can properly respond to different objects and changes in objects, thus providing stable operation. In the apparatus, defocus signals are calculated according to object image data concerning an object to be photographed, information effective for focal point calculation is extracted from the object image data, and the defocus signals are weighted and averaged by weighting coefficients corresponding to the effective information signals, thereby obtaining a statistical defocus signal.
Inventors:
KUSAKA YOSUKE
UTAGAWA TAKESHI
UTAGAWA TAKESHI
Application Number:
JP11114485A
Publication Date:
January 16, 1997
Filing Date:
May 23, 1985
Export Citation:
Assignee:
NIPPON KOGAKU KK
International Classes:
G02B7/28; G02B7/09; G02B7/34; G02B7/36; G03B3/00; G03B13/36; (IPC1-7): G02B7/34; G03B13/36
Domestic Patent References:
| JP59142506A | ||||
| JP60247210A |
Attorney, Agent or Firm:
Fuyuki Nagai