发明名称 ELECTRONIC LIGHT CONTROL SYSTEM AND ELECTRONIC FLASH DEVICE
摘要 PURPOSE:To provide an electronic light control system by which the emitted light quantity of an electronic flash device is independently corrected and a desired light quantity ratio is easily obtained in the case of performing multiple flash photographing. CONSTITUTION:This system is provided with a comparison means 3 comparing the photometric quantity of the emitted light quantity of the electronic flash device 200 by a 1st photometry means 8 with a reference signal corresponding to set exposure from a signal generating means based on light from an object and generating a 2nd signal; a 2nd photometric means 8 performing the photometry of the emitted light quantity of the device 200 not through the object; a light control quantity decision means 9 deciding target emitted light quantity based on the 2nd photometric quantity, the set exposure, and the correction light quantity of the device 200 by a correction quantity setting means 10 from the time when a 1st signal is generated to the time when the 2nd signal is generated and generating a 3rd signal when the 2nd photometric quantity attains the target emitted light quantity; and a light emission control means 2 allowing the device 200 to start light emission when a shutter synchronizing signal is generated and stop the light emission when the 3rd signal is generated.
申请公布号 JPH06175188(A) 申请公布日期 1994.06.24
申请号 JP19920351383 申请日期 1992.12.08
申请人 NIKON CORP 发明人 SAKAMOTO HIROSHI
分类号 G03B7/16;G03B7/28;G03B15/05 主分类号 G03B7/16
代理机构 代理人
主权项
地址