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).

公开(公告)号：US20190196157A1

公开(公告)日：2019-06-27

申请号：US16231522

申请日：2018-12-23

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Yasuharu YAMADA ,  Toyoki KON ,  Yuki KUBOTA

IPC: G02B13/02 ,  G02B13/06 ,  G02B27/00 ,  G02B7/04

CPC classification number: G02B13/02 ,  G02B7/04 ,  G02B13/06 ,  G02B27/0025

Abstract: A zoom optical system includes a front-side lens unit, an intermediate lens unit, and a rear-side lens unit. The front-side lens unit includes a first front unit and a second front unit, and a distance between the first front unit and the second front unit is wider at a telephoto end than at a wide angle end. The intermediate lens unit includes a first intermediate unit and a second intermediate unit, and a distance between the first intermediate unit and the second intermediate unit is narrower at the telephoto end than at the wide angle end. A distance between the second intermediate unit and a lens unit adjacent to the second intermediate unit varies. The second intermediate unit moves at the time of focusing, and the following conditional expressions (1) and (2) are satisfied: 0.9≤LTLT/LTLW≤1.17  (1) 4.2≤KMBT≤20.0  (2).

公开(公告)号：US20180017771A1

公开(公告)日：2018-01-18

申请号：US15717829

申请日：2017-09-27

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Toyoki KON

IPC: G02B15/163 ,  G02B13/00 ,  G02B15/20 ,  G02B27/64

CPC classification number: G02B15/163 ,  G02B13/009 ,  G02B15/173 ,  G02B15/20 ,  G02B27/646

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≦υdGn_min_p≦27   (2), and −0.03≦TpGn_min_p≦0.014   (3).

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：US20140022647A1

公开(公告)日：2014-01-23

申请号：US14034544

申请日：2013-09-23

Applicant: OLYMPUS CORPORATION ,  OLYMPUS IMAGING CORP.

Inventor： Yasuji OGATA ,  Yasuharu YAMADA ,  Toshio TAKAHASHI ,  Toyoki KON

IPC: G02B13/04

CPC classification number: G02B13/04 ,  G02B15/173 ,  G02B15/177

Abstract: The invention provides a zoom lens, characterized by comprising, a zoom lens, which comprises, in order from an object side thereof: a first lens group of negative refracting power, a second lens group of positive refracting power, a third lens group of negative refracting power, and a fourth lens group of positive refracting power, wherein: upon zooming from a wide-angle end to a telephoto end of the zoom lens, a separation between the respective lens groups changes, upon focusing from a focusing-on-infinity state to a close-range focusing state, the third lens group moves in an optical axis direction, and the conditions (1) and (2) are satisfied at the wide-angle end.

Abstract translation: 本发明提供一种变焦透镜，其特征在于包括：变焦透镜，其从物体侧依次包括：负折射力的第一透镜组，正折射率的第二透镜组，负折射率的第三透镜组 折射力的第四透镜组和正折射率的第四透镜组，其中：在从变焦透镜的广角端到望远端变焦时，各个透镜组之间的间隔在聚焦于无限远时变化 状态到近距离聚焦状态，第三透镜​​组沿光轴方向移动，并且在广角端处满足条件（1）和（2）。