Invention Grant
- Patent Title: Zoom lens, optical apparatus, and a manufacturing method of the zoom lens
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Application No.: US15161235Application Date: 2016-05-21
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Publication No.: US10551601B2Publication Date: 2020-02-04
- Inventor: Keigo Koida
- Applicant: Nikon Corporation
- Applicant Address: JP Tokyo
- Assignee: Nikon Corporation
- Current Assignee: Nikon Corporation
- Current Assignee Address: JP Tokyo
- Agency: Shapiro, Gabor and Rosenberger, PLLC
- Priority: JP2013-240958 20131121; JP2014-174637 20140828
- Main IPC: G02B15/177
- IPC: G02B15/177 ; G02B15/14 ; G02B27/64 ; G02B5/00

Abstract:
A first lens group having a negative refractive power, a second lens group having a positive refractive power, a third lens group having a negative refractive power, and a fourth lens group having a positive refractive power are provided in order from an object. The first to fourth lens groups move on an optical axis so that zooming is performed by changing each distance between adjacent lens groups. The first lens group comprises, in order from the object, a negative lens arranged closest to the object, a negative lens and a positive lens, and when an air interval between the third and fourth lens groups in the wide-angle end state is denoted as D3T and an air interval between the third and fourth lens groups in the telephoto end state is denoted as D3T, the following condition is satisfied: 0.30
Public/Granted literature
- US20160341939A1 ZOOM LENS, OPTICAL APPARATUS, AND A MANUFACTURING METHOD OF THE ZOOM LENS Public/Granted day:2016-11-24
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