发明名称 Optical apparatus having a zoom mechanism
摘要 An optical apparatus having a zoom mechanism for zooming comprised of a plurality of groups of lens groups driven independently of one another by a plurality of motors comprises driving apparatus for driving the plurality of motors at substantially constant speed during zooming, and control apparatus for compensatively moving one of the lens units on the basis of the positional information of another of the lens units upon stopping thereof during the stoppage of the zooming.
申请公布号 US5189559(A) 申请公布日期 1993.02.23
申请号 US19910786180 申请日期 1991.10.31
申请人 CANON KABUSHIKI KAISHA 发明人 KANEKO, YOSHIYUKI
分类号 G02B7/08;G02B7/10;G03B5/00 主分类号 G02B7/08
代理机构 代理人
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