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）。

公开(公告)号：US20140185148A1

公开(公告)日：2014-07-03

申请号：US14140346

申请日：2013-12-24

Applicant: OLYMPUS IMAGING CORP.

Inventor： Hirohiko KIMATA ,  Yasuharu YAMADA ,  Kenichi NAGASAWA ,  Hiroshi KODAMA ,  Toshio TAKAHASHI ,  Kento KOKUBU

IPC: G02B15/22

CPC classification number: G02B15/22 ,  G02B15/14 ,  G02B15/173 ,  G02B15/177

Abstract: In a zoom lens of a fixed total length, at the time of changing the magnification from the wide-angle end toward the telephoto end, the first lens group is anchored while the second lens group is moved, and the third and fourth lens groups are moved so as to be located at the object side of the telephoto end relative to the wide-angle end, such that: the interval between the second and third lens groups is decreased at the telephoto end relative to the wide-angle end; the interval between the third and fourth lens groups is increased at the telephoto end relative to the wide-angle end; and the interval between the fourth and fifth lens groups is increased at the telephoto end relative to the wide-angle end, and at the time of focusing a near object point from a remote object point, the second lens group is moved.

Abstract translation: 在固定的总长度的变焦透镜中，在从广角端向望远端改变放大倍数时，第一透镜组在第二透镜组移动的同时被固定，第三和第四透镜组是 相对于广角端部位于长焦端的物体侧，使得第二透镜组和第三透镜组之间的间隔在望远端相对于广角端减小; 第三透镜组和第四透镜组之间的间隔在望远端相对于广角端增加; 并且第四透镜组和第五透镜组之间的间隔在望远端相对于广角端增加，并且在从远程对象点聚焦近物点时，第二透镜组移动。