Invention Grant
- Patent Title: Zoom lens and image pickup apparatus having the same
- Patent Title (中): 具有相同的变焦镜头和摄像装置
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Application No.: US13614416Application Date: 2012-09-13
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Publication No.: US08797655B2Publication Date: 2014-08-05
- Inventor: Shigenobu Sugita
- Applicant: Shigenobu Sugita
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon USA Inc. IP Division
- Priority: JP2011-220908 20111005; JP2011-220909 20111005
- Main IPC: G02B15/14
- IPC: G02B15/14

Abstract:
A zoom lens includes a lens unit Ln having negative refractive power including two or less lenses moving during focusing and zooming, a lens unit Lp1 having positive refractive power disposed adjacent to an object side thereof, and a lens unit Lp2 having positive refractive power disposed adjacent to an image side thereof. The lens units Lp1 and Lp2 move during zooming. A distance Tlw between a lens surface nearest to the object side in the entire zoom lens and an image plane at a wide-angle end, a distance Dnw between the lens surface nearest to the image side of the lens unit Ln and the image plane at the wide-angle end, a back focus bfw at the wide-angle end, and a maximum amount of movement Mnz during focusing of the lens unit Ln at a telephoto end are appropriately set.
Public/Granted literature
- US20130088786A1 ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME Public/Granted day:2013-04-11
Information query