Light metering device

Details Light metering device Light metering device

1989-03-06

1990-06-26

Hix, L. T.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

2502086, 356222, G03B 708

Patent

active

049376110

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.

REFERENCES:
patent: 4364650 (1982-12-01), Terashita et al.
patent: 4629304 (1986-12-01), Saegusa
patent: 4774401 (1988-09-01), Yamada et al.
patent: 4796043 (1989-01-01), Izumi et al.

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