Light metering device
US4937611A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1989 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Mar 6, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/09976
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light metering device comprises a photometric element for independently metering a plurality of metering areas into which a whole image area is divided to provide weighted average brightness information for a scene to be photographed. The whole image area is divided into a plurality of metering areas including at least a center metering area defined at center of the whole image area, a lower metering area defined right below the center metering area, and two lower metering areas defined by a lower center half of the whole image area excluding the center metering area and the lower center metering area. The lower center metering area is weighted less than the center and lower metering areas by weighting differently the photometric sensitivities of the metering areas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.