公开(公告)号：US20180210179A1

公开(公告)日：2018-07-26

申请号：US15927152

申请日：2018-03-21

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Takashi FUJIKURA ,  Kenichi NAGASAWA ,  Masaru MOROOKA

IPC: G02B15/177 ,  G02B5/00 ,  G02B27/00 ,  G02B15/20

CPC classification number: G02B15/177 ,  G02B5/005 ,  G02B15/20 ,  G02B27/0025

Abstract: A zoom lens includes a front unit having a negative refractive power; and a rear unit having a positive refractive power, which includes an aperture stop. The front unit includes a first negative refractive power lens, a second negative refractive power lens, and a third positive refractive power lens. The first lens is nearest to an object, and has a meniscus shape with a convex surface directed toward the object side, and the second lens is on an image side of the first lens, and has a meniscus shape with a convex surface directed toward the object side. The rear unit includes a first lens unit A and a second lens unit B, wherein when zooming from a wide angle end to a telephoto end, a distance between the front unit and the rear unit narrows, and a distance between the first lens unit A and the second lens unit B changes. The first lens unit A includes a first sub-lens unit having a positive refractive power, the aperture stop, and a second sub-lens unit. The second sub-lens unit includes a focusing lens unit, and when focusing, only the focusing lens unit moves along an optical axis, and when zooming, a distance between the first sub-lens unit and the second sub-lens unit changes.

公开(公告)号：US20170068079A1

公开(公告)日：2017-03-09

申请号：US15355951

申请日：2016-11-18

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Takashi FUJIKURA ,  Kenichi NAGASAWA ,  Masaru MOROOKA

IPC: G02B15/177 ,  G02B5/00 ,  G02B27/00

CPC classification number: G02B15/177 ,  G02B5/005 ,  G02B15/20 ,  G02B27/0025

Abstract: A zoom lens includes a front unit having a negative refractive power and a rear unit having a positive refractive power, which includes an aperture stop, and the front unit includes a first lens having a negative refractive power, and the first lens has a meniscus shape of which a convex surface is directed toward the object side, and the rear unit includes a first lens unit A and a second lens unit B, and at the time of zooming from a wide angle end to a telephoto end, a distance between the front unit and the rear unit changes.

Abstract translation: 变焦透镜包括具有负屈光力的前单元和具有正屈光力的后单元，其包括孔径光阑，并且前单元包括具有负屈光力的第一透镜，并且第一透镜具有弯月形状 其中凸面指向物体侧，后部单元包括第一透镜单元A和第二透镜单元B，并且在从广角端到远摄端的变焦时，前方的距离 单元和后置单元发生变化。

公开(公告)号：US20180031813A1

公开(公告)日：2018-02-01

申请号：US15494687

申请日：2017-04-24

Applicant: OLYMPUS CORPORATION

Inventor： Masaru MOROOKA ,  Kenichi NAGASAWA

IPC: G02B15/22 ,  G02B21/36 ,  G02B21/24 ,  G02B23/24 ,  A61B1/04 ,  H04N5/232 ,  G01J1/08 ,  A61B1/00 ,  A61B1/005 ,  G03B21/14 ,  H04N5/225

CPC classification number: G02B15/22 ,  A61B1/00039 ,  A61B1/00112 ,  A61B1/00188 ,  A61B1/005 ,  A61B1/04 ,  G01J1/08 ,  G02B15/177 ,  G02B21/241 ,  G02B21/361 ,  G02B23/2438 ,  G02B23/2469 ,  G03B21/142 ,  G03B33/12 ,  H04N5/2254 ,  H04N5/2256 ,  H04N5/23293 ,  H04N9/3141 ,  H04N2005/2255

Abstract: A single focal length lens includes a first lens unit having a negative refractive power, an aperture stop, a second lens unit having a positive refractive power, a third lens unit having a negative refractive power, and a fourth lens unit having a positive refractive power, wherein a position of the first lens unit, a position of the second lens unit, and a position of the fourth lens unit are fixed all the time, and at the time of focusing from an object at infinity to an object at a short distance, the third lens unit moves toward the image side, and the following conditional expressions (1), (2), and (3) are satisfied: −5