发明名称 TTL automatic flash control device
摘要 A TTL automatic flash control device for a flash light source for a camera is disclosed. The device has a flash control unit for controlling flashing of the flash light source. In sequential flashing photographic operation mode in which a plurality of flashing photographic operations are conducted sequentially, the flash control unit preliminarily flashes the flash light source at least once before the series of flashing photographic operations are initiated. Thereafter, the flash control unit performs main flashing of the flash light source for each shot. The device further includes a weighting value operating unit for detecting distribution of reflected light regarding a plurality of photometric areas obtained by dividing a field during the preliminary flashing and for calculating a weighting value for each of the photometric areas on the basis of the distribution of the reflected light, and a quantity of light control unit for metering each of the photometric areas on the basis of the weighting value thereof during the main flashing and for controlling a quantity of light emitted from the flash light source.
申请公布号 US5168300(A) 申请公布日期 1992.12.01
申请号 US19910796789 申请日期 1991.11.25
申请人 NIKON CORPORATION 发明人 YASUKAWA, SEIICHI
分类号 G03B7/099;G03B7/16;G03B7/28;G03B15/05 主分类号 G03B7/099
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