Invention Grant
- Patent Title: Zoom lens and image pickup apparatus using the same
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Application No.: US15717829Application Date: 2017-09-27
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Publication No.: US10656398B2Publication Date: 2020-05-19
- Inventor: Kazuteru Kawamura , Toyoki Kon
- Applicant: OLYMPUS CORPORATION
- Applicant Address: JP Tokyo
- Assignee: OLYMPUS CORPORATION
- Current Assignee: OLYMPUS CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Holtz, Holtz & Volek PC
- Main IPC: G02B15/163
- IPC: G02B15/163 ; G02B13/00 ; G02B15/20 ; G02B27/64 ; G02B15/173

Abstract:
A zoom lens includes a front-side lens unit, a rear-side lens unit, and an aperture stop. The front-side lens unit includes either one lens unit having a negative refractive power or two lens units having a negative refractive power, and has a negative refractive power as a whole. The rear-side lens unit is disposed on an image side of the front-side lens unit, and has a positive refractive power as a whole at a telephoto end. The rear-side lens unit includes a plurality of lens units, and includes an object-side positive lens unit having a positive refractive power which is disposed nearest to object and the following conditional expressions (1), (2), and (3) are satisfied: 1.2≤|MGB_t|≤6 (1), 10≤νdGn_min_p≤27 (2), and −0.03≤TpGn_min_p≤0.014 (3).
Public/Granted literature
- US20180017771A1 ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME Public/Granted day:2018-01-18
Information query