公开(公告)号：US20160291298A1

公开(公告)日：2016-10-06

申请号：US15180390

申请日：2016-06-13

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Kazuyuki IWASA

IPC: G02B15/08 ,  G03B13/32 ,  G03B7/20

CPC classification number: G02B15/08 ,  G02B9/14 ,  G02B9/28 ,  G02B13/00 ,  G03B3/02 ,  G03B7/20 ,  G03B13/32

Abstract: A plurality of imaging optical systems includes at least two imaging optical systems, and each imaging optical system includes an identical diaphragm member. Each imaging optical system includes in order from an object side, a front lens unit having a positive refractive power, a focusing lens unit having a negative refractive power, and a rear lens unit having a positive refractive power. The diaphragm member is disposed near the focusing lens unit. At the time of focusing, only the focusing lens unit moves on an optical axis. Each imaging optical system satisfies the following conditional expression (1), and the plurality of imaging optical systems satisfies the following conditional expressions (2) and (3). 0.5

Abstract translation: 这些成像光学系统包括具有不同焦距的两个成像光学系统。 每个成像光学系统设置有相同的隔膜构件，并且从物体侧依次设置具有正折光力的前侧透镜组（GF），具有负屈光力的聚焦透镜组（Fo） ，以及具有正折射力的后侧透镜组（GR）。 隔膜构件设置在聚焦透镜组（Fo）附近。 只有聚焦透镜组（Fo）沿光轴移动。 每个成像光学系统满足条件表达式（1），即0.5