Invention Grant
- Patent Title: Zoom optical system, optical device and method for manufacturing the zoom optical system
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Application No.: US15984344Application Date: 2018-05-19
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Publication No.: US10209498B2Publication Date: 2019-02-19
- Inventor: Satoru Shibata , Tomoyuki Sashima
- 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: JP2014-175724 20140829; JP2014-175725 20140829; JP2014-175726 20140829; JP2014-175727 20140829; JP2014-234426 20141119; JP2014-234427 20141119; JP2014-234428 20141119; JP2014-234429 20141119; JP2014-234430 20141119; JP2014-234431 20141119; JP2015-141990 20150716; JP2015-141991 20150716; JP2015-141992 20150716; JP2015-141993 20150716
- Main IPC: G02B15/20
- IPC: G02B15/20 ; G02B15/173 ; G02B27/64
Abstract:
A first lens group (G1) having positive refractive power, a front-side lens group (GX), an intermediate lens group (GM) having positive refractive power, and a rear-side lens group (GR) are arranged in order from an object side. The front-side lens group (GX) is composed of one or more lens groups and has a negative lens group At least part of the intermediate lens group (GM) is a focusing lens group (GF). The rear-side lens group (GR) is composed of one or more lens groups. Upon zooming, the first lens group (G1) is moved with respect to an image surface, a distance between the first lens group (G1) and the front-side lens group (GX) is changed, a distance between the front-side lens group (GX) and the intermediate lens group (GM) is changed, and a distance between the intermediate lens group (GM) and the rear-side lens group (GR) is changed.
Public/Granted literature
- US20180267280A1 ZOOM OPTICAL SYSTEM, OPTICAL DEVICE AND METHOD FOR MANUFACTURING THE ZOOM OPTICAL SYSTEM Public/Granted day:2018-09-20
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