Invention Grant
US08040615B2 Zoom lens and optical apparatus equipped therewith 有权
变焦镜头和配备其的光学仪器

  • Patent Title: Zoom lens and optical apparatus equipped therewith
  • Patent Title (中): 变焦镜头和配备其的光学仪器
  • Application No.: US12528448
    Application Date: 2008-02-08
  • Publication No.: US08040615B2
    Publication Date: 2011-10-18
  • Inventor: Susumu Sato
  • Applicant: Susumu Sato
  • Applicant Address: JP Tokyo
  • Assignee: Nikon Corporation
  • Current Assignee: Nikon Corporation
  • Current Assignee Address: JP Tokyo
  • Agency: Miles & Stockbridge P.C.
  • Priority: JP2007-047404 20070227; JP2007-047422 20070227
  • International Application: PCT/JP2008/052587 WO 20080208
  • International Announcement: WO2008/105248 WO 20080904
  • Main IPC: G02B15/14
  • IPC: G02B15/14
Zoom lens and optical apparatus equipped therewith
Abstract:
A zoom lens is provided with comprising a plurality of lens groups including, in order from an object, a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3, and a fourth lens group G4, upon zooming from a wide-angle end state W to a telephoto end state T, a distance between the first lens group G1 and the second lens group G2 increasing, a distance between the second lens group G2 and the third lens group G3 decreasing, and the most image side lens group among the plurality of lens groups moving along an optical axis with a trajectory having convex shape facing the object side, and given conditional expressions being satisfied, thereby excellently correcting chromatic aberration in a farther away shooting range, capable of having excellent optical performance with being compact.
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