发明名称 Automatic focusing system
摘要 A system for automatically adjusting the focus of lens is provided with an auxiliary arrangement for forcibly shifting the lens to a predetermined position when the focus detection by a focus detecting system is either difficult or impossible with the lens being at its initial position and causing the focus detecting system to effect focus detection under the new shifted condition of the lens.
申请公布号 US4416523(A) 申请公布日期 1983.11.22
申请号 US19820380438 申请日期 1982.05.20
申请人 CANON KABUSHIKI KAISHA 发明人 KAWABATA, TAKASHI
分类号 G03B3/10;(IPC1-7):G03B3/10 主分类号 G03B3/10
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