Invention Grant
- Patent Title: Zoom lens and image pickup apparatus using the same
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Application No.: US15717804Application Date: 2017-09-27
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Publication No.: US10585267B2Publication Date: 2020-03-10
- Inventor: Kazuteru Kawamura
- 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 ; G02B27/64

Abstract:
A zoom lens includes in order from an object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a rear-side lens unit, and an aperture stop. The second lens unit includes a first sub-unit having a negative refractive power and a second sub-unit having a negative refractive power, and the rear-side lens unit includes a third lens unit having a positive refractive power which is disposed nearest to object. The first lens unit includes at least a negative lens and a positive lens and the first sub-unit includes at least a negative lens and a positive lens. The third lens unit includes at least two lens components having a positive refractive power, and the following conditional expressions (1) and (2) are satisfied: 61≤νd1G_max_p (1), and −0.03≤Tp2Ga_min_p≤0.0165 (2).
Public/Granted literature
- US20180275381A1 ZOOM LENS AND IMAGE PICKUP APPARATUS USING THE SAME Public/Granted day:2018-09-27
Information query