发明名称 AF control apparatus
摘要 An AF control apparatus includes a plurality of movable lens groups, each of which is movable along an optical axis for performing focusing independently, and a driving system for moving each of the movable lens groups. A moving path of each of the movable lens groups during an autofocusing operation is defined so that a ratio of moving distances of the each of the movable lens groups is constant over an entire zoom range.
申请公布号 US7119968(B2) 申请公布日期 2006.10.10
申请号 US20050121013 申请日期 2005.05.04
申请人 PENTAX CORPORATION 发明人 SAITO NOBORU;SASAKI TAKAMITSU;YAMAMOTO HIDEYUKI
分类号 G02B15/14;G02B7/10;G02B7/28;G02B7/36;G03B17/00 主分类号 G02B15/14
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