Invention Grant
- Patent Title: Zoom lens and imaging apparatus having four lens groups
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Application No.: US17490890Application Date: 2021-09-30
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Publication No.: US11280980B2Publication Date: 2022-03-22
- Inventor: Ryosuke Nagami
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Studebaker & Brackett PC
- Priority: JPJP2017-161263 20170824
- Main IPC: G02B15/177
- IPC: G02B15/177 ; G02B9/34 ; G02B27/00 ; H04N5/225 ; G02B7/14 ; G02B27/64 ; G02B15/14 ; G02B13/00

Abstract:
The zoom lens consists of, in order from the object side, a first lens group that has a negative refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. During zooming, in each lens group, distances between the adjacent groups in the direction of the optical axis are changed. The first lens group consists of, in order from the object side, a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The third lens group consists of a negative lens. During focusing, only the third lens group moves along the optical axis. The zoom lens satisfies predetermined conditional expressions.
Public/Granted literature
- US20220019055A1 ZOOM LENS AND IMAGING APPARATUS HAVING FOUR LENS GROUPS Public/Granted day:2022-01-20
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