Photometric device for camera
US5450163A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1993 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Sep 17, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/09979
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The photometric device for a camera according to this invention enables calculation of an exposure value without carrying out a photometry again even when in at least a part of plural photometric regions exists a region whose brightness information is small. According to the photometric device which is equipped with a photometric unit for carrying out a photometry on a subject field which is divided into plural photometric regions to detect brightness information of each photometric region, thereby calculating the exposure value on the basis of the plural brightness information from the photometric unit, one of a first calculation mode in which the exposure value is calculated on the basis of the brightness information of each photometric region and a second calculation mode in which an average value of plural brightness information of the plural photometric regions is calculated and the exposure value is calculated on the basis of the average value is selected on the basis of the brightness information, and the exposure calculation value is calculated in accordance with the selected calculation mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.