公开(公告)号：US20180017770A1

公开(公告)日：2018-01-18

申请号：US15717816

申请日：2017-09-27

Applicant: OLYMPUS CORPORATION

Inventor： Toyoki KON ,  Kazuteru KAWAMURA ,  Yasuharu YAMADA ,  Tetsuya YANAI ,  Daichi MURAKAMI

IPC: G02B15/163 ,  G02B13/00 ,  G02B15/20 ,  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 third lens unit having a positive refractive power, a fourth lens unit having a negative refractive power, and a fifth lens unit having a positive refractive power. The first lens unit includes a positive lens, and the second lens unit includes a positive lens, and the following conditional expressions (1), (2), (3), and (4) are satisfied: −0.015≦Tp2G_min_p≦0.015  (1), 70.3≦νd1G_max_p  (2), 1.76≦nd2G_max_p≦2.3  (3), and 0.3≦|f2/f3|≦0.9  (4).

公开(公告)号：US20170123193A1

公开(公告)日：2017-05-04

申请号：US15340434

申请日：2016-11-01

Applicant: OLYMPUS CORPORATION

Inventor： Tetsuya YANAI ,  Toyoki KON ,  Daichi MURAKAMI ,  Yuki KUBOTA

IPC: G02B15/173 ,  G02B5/00 ,  G02B27/00 ,  G02B15/20

CPC classification number: G02B15/173 ,  G02B5/005 ,  G02B15/20 ,  G02B27/0025

Abstract: A zoom lens includes, in order from the object side, a first lens unit having a positive focal length, a second lens unit having a negative focal length, a third lens unit having a positive focal length, a fourth lens unit having a negative focal length, and a fifth lens unit having a positive focal length, wherein following Conditional Expressions (1) and (2) are satisfied: 0.3≦D34W/D45W≦1  (1), and 0.2≦(D34W/D45W)/(D34T/D45T)≦0.6  (2).