Invention Grant
- Patent Title: Zoom lens, lens barrel, and image-capturing device
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Application No.: US17157031Application Date: 2021-01-25
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Publication No.: US11953662B2Publication Date: 2024-04-09
- Inventor: Tomoya Koga
- Applicant: Ricoh Company, Ltd.
- Applicant Address: JP Tokyo
- Assignee: RICOH COMPANY, LTD.
- Current Assignee: RICOH COMPANY, LTD.
- Current Assignee Address: JP Tokyo
- Agency: XSENSUS LLP
- Priority: JP 20033480 2020.02.28 JP 21002696 2021.01.12
- Main IPC: G02B15/14
- IPC: G02B15/14 ; G02B15/16

Abstract:
A zoom lens includes a first lens group having positive refractive power, a second lens group having negative refractive power, and a rear group. The second lens group consists of a second sub-first lens group having positive or negative power, and a second sub-second lens group having negative power. The second sub-second lens group consists of, sequentially from the object side toward the image: a positive second-first lens component; a negative second-second lens component; and a negative second-third lens component. During zooming from a short focal length end to a long focal length end, a distance between the first lens group and the second lens group increases, and a distance between the second lens group and the rear group decreases. A part of the second lens group is movable in a direction perpendicular to an optical axis during correction of image blurring.
Public/Granted literature
- US20210278642A1 ZOOM LENS, LENS BARREL, AND IMAGE-CAPTURING DEVICE Public/Granted day:2021-09-09
Information query