发明名称 AUTOMATIC FOCUSING DEVICE AND AUTOMATIC FOCUSING CAMERA
摘要 PROBLEM TO BE SOLVED: To perform highly accurate focusing to a moving object to be focused on in servo AF(automatic focusing) mode. SOLUTION: In the servo AF mode, a lens driving quantity computed from a defocusing quantity is compared with a predetermined specific lens driving quantity corresponding to a focusing range and when the computed lens driving quantity is larger than the defocusing quantity, the lens is driven according to the lens driving quantity; when the computed lens driving quantity becomes less than the specific driving quantity, the computed lens driving quantity is decreased at a specific rate and the lens is driven with the decreased lens driving quantity (#208 to #210).
申请公布号 JP2002250858(A) 申请公布日期 2002.09.06
申请号 JP20010051717 申请日期 2001.02.27
申请人 CANON INC 发明人 INOUE KOJI
分类号 G03B13/36;G02B7/28;G02B7/34;(IPC1-7):G02B7/28 主分类号 G03B13/36
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