Title:
TTL PHOTOMETRY DEVICE FOR CAMERA
Document Type and Number:
Japanese Patent JP3427215
Kind Code:
B2
Abstract:
PURPOSE: To correct the errors of photometry at high speed with high accuracy even when lens constitution is changed because of the exchange of a photographing lens and zooming, etc.
CONSTITUTION: A part of object light passing through the photographing lens 2 is formed into an image on a photometry sensor 10 by an image reformation lens 9 for photometry again. The image on the photometry sensor 10 is converted into an electrical signal and transmitted to a photometry arithmetic device 12, and lens data is transferred by a lens CPU 13 provided in the photographing lens 2 and storing each lens data. By using the lens data, the device 12 processes and corrects the luminance information of the photometry sensor 10 by neural network and further the optimum exposure control value is derived.
Inventors:
Masaru Muramatsu
Shinichi Tsukada
Shinichi Tsukada
Application Number:
JP2359493A
Publication Date:
July 14, 2003
Filing Date:
January 19, 1993
Export Citation:
Assignee:
NIKON CORPORATION
International Classes:
G02B7/10; G03B7/099; G03B7/0997; G03B7/24; G03B7/28; (IPC1-7): G03B7/28; G02B7/10; G03B7/099; G03B7/24
Domestic Patent References:
| JP4215631A | ||||
| JP3167535A | ||||
| JP63271239A | ||||
| JP5674226A | ||||
| JP465183Y1 |
Attorney, Agent or Firm:
Yoshio Inamoto