公开(公告)号：US20150109682A1

公开(公告)日：2015-04-23

申请号：US14514107

申请日：2014-10-14

Applicant: OLYMPUS CORPORATION

Inventor： Takashi KASAHARA

IPC: G02B21/33 ,  G02B21/16 ,  G02B21/02

CPC classification number: G02B21/33 ,  G02B21/02 ,  G02B21/025 ,  G02B21/16

Abstract: An immersion microscope objective includes, in order from an object side, a first lens group having a positive refractive power, a second lens group, and a third lens group, wherein the first lens group changes a light beam from an object to a convergent light beam, the second lens group has a refractive power smaller than that of the first lens group, and the following conditional expression (1-1) is satisfied: 7.5 mm≦NAo×d0  (1-1) where NAo denotes an object-side numerical aperture of the immersion microscope objective, and d0 denotes a working distance of the immersion microscope objective.

Abstract translation: 浸没式显微镜物镜从物体侧依次包括具有正屈光力的第一透镜组，第二透镜组和第三透镜组，其中第一透镜组将来自物体的光束变换为会聚光 第二透镜组的折射力小于第一透镜组的屈光度，并且满足以下条件表达式（1-1）：7.5mm＆nlE; NAo×d0（1-1）其中NAo表示物体侧 浸液显微镜物镜的数值孔径，d0表示浸没显微镜物镜的工作距离。

公开(公告)号：US20190324247A1

公开(公告)日：2019-10-24

申请号：US16284842

申请日：2019-02-25

Applicant: OLYMPUS CORPORATION

Inventor： Takashi KASAHARA

IPC: G02B21/02 ,  G02B9/14

Abstract: A dry objective includes: first lens group that includes a plurality of meniscus lens components and has a positive power; a second lens group that includes a cemented lens, turns a pencil of diverging light from the first lens group into a pencil of converging light, and has a positive power; and a third lens group that includes a front group and a rear group and has a negative power, the front and rear groups having concave surfaces adjacent to and facing each other. The dry objective satisfies the following conditional expression: 0.43≤(hg2−hg1)/gt1≤0.9  (1) where gt1 indicates a thickness that a lens component of the rear group that is the closest to the object has on an optical axis; hg1 and hg2, the heights of an axial marginal light ray at the lens surface of the lens component that is the closest to the object and an image.

公开(公告)号：US20140320975A1

公开(公告)日：2014-10-30

申请号：US14257704

申请日：2014-04-21

Applicant: OLYMPUS CORPORATION

Inventor： Takashi KASAHARA

IPC: G02B21/02

CPC classification number: G02B21/02 ,  G02B21/33

Abstract: An immersion microscope objective includes a first lens group having a positive refractive power, a second lens group having a positive refractive power, and a third lens group having a negative refractive power. The first lens group includes a cemented lens of a positive lens and a meniscus lens, and at least one positive single lens, the second lens group changes a divergent light beam to a convergent light beam, and the third lens group includes an object-side lens group and an image-side lens group disposed concave surfaces are face-to-face sandwiching one air space. There is a plurality of lenses having a positive refractive power, and at least one lens having a positive refractive power out of the plurality of lenses having a positive refractive power has a cemented surface which is cemented to a lens having a negative refractive power.

Abstract translation: 浸没式显微镜物镜包括具有正折光力的第一透镜组，具有正折光力的第二透镜组和具有负折光力的第三透镜组。 第一透镜组包括正透镜和弯月透镜的胶合透镜，以及至少一个正单透镜，第二透镜组将发散光束变换为会聚光束，并且第三透镜组包括物体侧 透镜组和设置凹面的图像侧透镜组是面对面地夹着一个空气空间。 存在具有正屈光力的多个透镜，并且具有正屈光力的多个透镜中具有正屈光力的至少一个透镜具有胶合到具有负屈光力的透镜的胶合表面。

公开(公告)号：US20180113293A1

公开(公告)日：2018-04-26

申请号：US15784725

申请日：2017-10-16

Applicant: OLYMPUS CORPORATION

Inventor： Kenichiro ABE ,  Hirokazu KONISHI ,  Masahiro SAKAKURA ,  Takashi KASAHARA ,  Yuso FUJITA

IPC: G02B21/02 ,  G02B9/18

CPC classification number: G02B21/025 ,  G02B9/18 ,  G02B21/02

Abstract: An objective includes a first lens group that has a positive refractive power and a second lens group that has a negative refractive power. The objective includes a first negative lens and satisfies 0.005≤dol/hol≤0.1   (1) 0.005≤hmin/hl≤0.72   (2) 10 mm≤L≤100 mm   (3) 0.1≤L/f≤31   (4) when do1is a thickness of the first negative lens, ho1 is an axial marginal ray height on a lens surface on the object side of the first negative lens, hmin is a minimum value of an axial marginal ray height in the second lens group, hl is a height of an axial marginal ray on a lens surface of the objective that is situated closest to the image side, L is a length of the objective, and f is a focal length of the objective.

公开(公告)号：US20190324257A1

公开(公告)日：2019-10-24

申请号：US16378110

申请日：2019-04-08

Applicant: OLYMPUS CORPORATION

Inventor： Takashi KASAHARA

IPC: G02B21/33 ,  G02B9/34 ,  G02B21/02

Abstract: A immersion microscope objective includes: a first positive lens group that includes at least one positive single lens and a first cemented lens; a second positive lens group that includes a plurality of cemented lenses including a second cemented lens that is the closest to an object; a third negative lens group that includes a first lens component having a concave surface; and a fourth lens group that includes a second lens component that is the closest to the object, the second lens component having a concave surface, wherein the objective satisfies the following conditional expressions: 0.986≤NAob/N0≤0.995  (1) 0.0095≤1/(N1×ν1)≤0.015  (2) where NAob indicates a numerical aperture of the objective; N0, a refractive index that an immersion liquid has for an e line; N1, a refractive index that the meniscus lens has for the e line; ν1, an Abbe number that the meniscus lens has for a d line.