发明授权
- 专利标题: Zoom lens and imaging apparatus
- 专利标题(中): 变焦镜头和成像设备
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申请号: US12167675申请日: 2008-07-03
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公开(公告)号: US07602558B2公开(公告)日: 2009-10-13
- 发明人: Kenichi Sato
- 申请人: Kenichi Sato
- 申请人地址: JP Saitama
- 专利权人: Fujinon Corporation
- 当前专利权人: Fujinon Corporation
- 当前专利权人地址: JP Saitama
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JPP2007-190729 20070723
- 主分类号: G02B15/14
- IPC分类号: G02B15/14
摘要:
A zoom lens is provided and includes: in order from the object side, a first lens group having a positive power and including in order from the object side, a negative lens, a reflecting member that bends an optical path by substantially 90°, and a positive lens having biconvex shape which has at least one aspherical surface; a second lens group having a negative power and including two lenses; a third lens group having a positive power; and a fourth lens group having a positive power and including in order from the object side, a cemented lens having a negative power and a positive lens having a meniscus shape which has at least one aspherical surface and a convex surface on the object side. The zoom lens is adapted to change a magnification thereof by moving the second lens group and forth lens group, and satisfies specific conditional equations.
公开/授权文献
- US20090027779A1 ZOOM LENS AND IMAGING APPARATUS 公开/授权日:2009-01-29