发明授权
- 专利标题: Zoom lens and image pickup apparatus having the same
- 专利标题(中): 具有相同的变焦镜头和摄像装置
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申请号: US13112231申请日: 2011-05-20
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公开(公告)号: US08395850B2公开(公告)日: 2013-03-12
- 发明人: Yoshihisa Tashiro
- 申请人: Yoshihisa Tashiro
- 申请人地址: JP
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JP
- 代理机构: Rossi, Kimms & McDowell LLP
- 优先权: JP2009-114059 20090509; JP2010-035248 20100219
- 主分类号: G02B15/14
- IPC分类号: G02B15/14
摘要:
A zoom lens comprises a first lens group having a negative refractive power and a second lens group having a positive refractive power in order from object to image sides, an interval between the first and second lens groups changes in a zoom operation, the first lens group is constituted by negative and positive lenses in order from the object to image sides, the negative and positive lenses of the first lens group are arranged at intervals, the second lens group is constituted by three lenses including positive and negative lenses in order from the object to image sides, and a radius of curvature of a lens surface at the object side of the negative lens constituting the first lens group, a shape of a negative lens having the maximum refractive power constituting the second lens group, and a refractive power of the second lens group are appropriately set.
公开/授权文献
- US20110222165A1 ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME 公开/授权日:2011-09-15
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