发明名称 Flash device
摘要 A flash device comprises a pre-flash circuit which conducts a small flash a plurality of times for reducing the pupil size in response to a camera release signal just before the commencement of the shutter opening operation and a main flash circuit for conducting flash for taking a picture after the commencement of shutter opening operation.
申请公布号 US4999663(A) 申请公布日期 1991.03.12
申请号 US19890446400 申请日期 1989.12.05
申请人 OLYMPUS OPTICAL CO., LTD. 发明人 NAKAMURA, HIROAKI
分类号 G03B15/05;H05B41/32 主分类号 G03B15/05
代理机构 代理人
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