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公开(公告)号：US11906725B2
公开(公告)日：2024-02-20
申请号：US16798439
申请日：2020-02-24
Applicant: FUJIFILM Corporation
Inventor： Keisuke Harada
CPC classification number: G02B23/243 , G02B9/06 , G02B23/2461 , G02B3/0075 , G02B2003/0093
Abstract: An illumination lens consists of a first lens and a second lens that are arranged in this order from a light source side toward an irradiation target side. The surface of the first lens close to the light source side and the surface of the first lens close to the irradiation target side are spherical convex surfaces, and the surface of the second lens close to the light source side is a spherical convex surface. Conditional expression determined in advance about the radii of curvature of the surfaces of the first and second lenses is satisfied.
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公开(公告)号：US09063340B2
公开(公告)日：2015-06-23
申请号：US14266080
申请日：2014-04-30
Applicant: FUJIFILM Corporation
Inventor： Keisuke Harada , Yoshiaki Ishii
CPC classification number: G02B23/243 , G02B9/34
Abstract: An objective optical system includes: a negative first lens group; an aperture stop; and a positive second lens group, provided in this order from an object side. The first lens group includes a first lens, which is a negative single lens, and a cemented lens formed by cementing a positive lens and a negative lens together, provided in this order from the object side. The second lens group includes a fourth lens, which is a positive single lens, and a cemented lens formed by cementing a positive lens and a negative lens together, provided in this order from the object side. The objective optical system satisfies Conditional Formula (1): f1/f
Abstract translation: 物镜光学系统包括：负第一透镜组; 孔径光阑; 以及从物体侧依次设置的正的第二透镜组。 第一透镜组包括作为负单透镜的第一透镜和从物体侧依次设置固定正透镜和负透镜而形成的胶合透镜。 第二透镜组包括作为正单透镜的第四透镜和从物体侧依次提供的将正透镜和负透镜粘合在一起形成的胶合透镜。 目标光学系统满足条件式（1）：f1 / f <1.1，其中f1是最靠近物体侧的透镜的焦距，f是整个透镜系统的焦距。
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公开(公告)号：US08902515B2
公开(公告)日：2014-12-02
申请号：US14266139
申请日：2014-04-30
Applicant: FUJIFILM Corporation
Inventor： Keisuke Harada , Yoshiaki Ishii
CPC classification number: G02B23/243 , A61B1/00096 , A61B1/00188 , G02B9/34 , G02B13/04
Abstract: An objective optical system includes: a first lens group having a negative power; an aperture stop; and a second lens group having a positive power, provided in this order from an object side. The first lens group includes a first lens, which is a negative single lens, and a cemented lens formed by a positive lens and a negative lens, provided in this order from the object side. The second lens group includes a fourth lens, which is a positive single lens, and a cemented lens formed by a positive lens and a negative lens, provided in this order from the object side. The objective optical system simultaneously satisfies Conditional Formulae (1) −1.5
Abstract translation: 物镜光学系统包括：具有负功率的第一透镜组; 孔径光阑; 以及具有正功率的第二透镜组，从物体侧开始依次设置。 第一透镜组包括作为负单透镜的第一透镜和由物镜侧依次设置的由正透镜和负透镜形成的胶合透镜。 第二透镜组包括第四透镜，其是正单透镜，以及由正透镜和负透镜形成的胶合透镜，从物体侧依次设置。 物镜光学系统同时满足条件公式（1）-1.5
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公开(公告)号：US12055702B2
公开(公告)日：2024-08-06
申请号：US17453377
申请日：2021-11-03
Applicant: FUJIFILM Corporation
Inventor： Keisuke Harada
CPC classification number: G02B23/243 , G02B9/34 , G02B9/62 , G02B13/18
Abstract: The objective lens for an endoscope consists of, in order from an object side, a first lens group consisting of one negative lens, a second lens group consisting of two lenses cemented together, a stop, a third lens group consisting of two lenses that have refractive powers with different signs and are cemented together, and a fourth lens group consisting of two lenses that have refractive powers with different signs and are cemented together. The objective lens for an endoscope satisfies a predetermined conditional expression regarding an Abbe number, a length of a lens system, and the like.
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公开(公告)号：US10310239B2
公开(公告)日：2019-06-04
申请号：US15830465
申请日：2017-12-04
Applicant: FUJIFILM Corporation
Inventor： Keisuke Harada
Abstract: The imaging lens consists of, in order from a magnified side, a first lens having a positive refractive power, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens having a negative refractive power, a fifth lens having a positive refractive power, a sixth lens having a positive refractive power, and a seventh lens having a positive refractive power, and satisfies predetermined Conditional Expressions (1) and (2) relating to Abbe numbers of the second lens to the fifth lens.
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Patent Agency Ranking
公开(公告)号：US09703089B2
公开(公告)日：2017-07-11
申请号：US14965025
申请日：2015-12-10
Applicant: FUJIFILM Corporation
Inventor： Keisuke Harada , Michio Cho
CPC classification number: G02B23/243 , G02B27/0025
Abstract: An objective lens for endoscopes is constituted essentially by, in order from the object side: a negative first lens having a concave surface toward the image side; a first cemented lens, formed by cementing a second lens and a third lens having refractive powers with signs opposite each other, provided in this order from the object side, together; a stop; a positive fourth lens having a convex surface toward the image side; and a second cemented lens, formed by cementing a positive fifth lens and a negative sixth lens, provided in this order from the object side, together, in which the coupling surface is convex toward the image side. Focusing from an object at a most distant point to an object at a most proximal point is performed by moving only the second cemented lens. A predetermined conditional formula is satisfied.
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公开(公告)号：US09442283B2
公开(公告)日：2016-09-13
申请号：US14601428
申请日：2015-01-21
Applicant: FUJIFILM CORPORATION
Inventor： Keisuke Harada
CPC classification number: G02B23/243 , A61B1/00096 , G02B13/006 , G02B23/26
Abstract: An endoscopic objective lens consists of a negative first lens group, a stop, and a positive second lens group, disposed in order from the object side. The first lens group is composed of a cemented lens formed of a first lens and a second lens with a concave surface on the image side cemented in order from the object side. The second lens group is composed of a positive single third lens and a cemented lens formed of a fourth lens and a fifth lens, either of which being a positive lens and the other being a negative lens, and having a positive refractive power, disposed in order from the object side. The endoscopic objective lens satisfies given conditional expressions related to Abbe numbers of the first and second lenses and radii of curvature of the image side and object side surfaces of the second lens.
Abstract translation: 内窥镜物镜由从物体侧依次设置的负第一透镜组，止挡部和正第二透镜组构成。 第一透镜组由从第一透镜形成的胶合透镜和在像侧上具有凹面的第二透镜从物体侧依次粘结。 第二透镜组由正的单个第三透镜和由第四透镜和第五透镜形成的胶合透镜组成，第四透镜和第五透镜中的任一个是正透镜，另一个是负透镜，并且具有正折射光焦度，设置在 从物体一侧起。 内窥镜物镜满足与第一和第二透镜的阿贝数以及第二透镜的像侧和物体侧表面的曲率半径有关的给定条件表达式。
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公开(公告)号：US08896940B2
公开(公告)日：2014-11-25
申请号：US14263445
申请日：2014-04-28
Applicant: FUJIFILM Corporation
Inventor： Keisuke Harada
CPC classification number: G02B9/34 , A61B1/00096 , A61B1/00188 , G02B13/04 , G02B23/243
Abstract: The angle of view of an objective optical system is widened, while suppressing generation of lateral chromatic aberration. An objective optical system includes: a first lens group having a negative power; an aperture stop; and a second lens group having a positive power, in this order from an object side. The first lens group includes a negative single first lens, and a cemented lens formed by cementing a positive lens and a negative lens together, provided in this order from the object side. The second lens group includes a positive single fourth lens, and a cemented lens formed by cementing a positive lens and a negative lens together, provided in this order from the object side. The objective optical system satisfies Conditional Formula (1): 15.0
Abstract translation: 物镜光学系统的视角被加宽，同时抑制横向色像差的产生。 物镜光学系统包括：具有负功率的第一透镜组; 孔径光阑; 以及从物体侧起依次具有正电力的第二透镜组。 第一透镜组包括负单面第一透镜和通过将正透镜和负透镜粘合在一起而形成的胶合透镜，从物体侧开始依次设置。 第二透镜组包括正单个第四透镜和通过将正透镜和负透镜粘合在一起而形成的胶合透镜，从物体侧开始依次设置。 目标光学系统满足条件式（1）：15.0 <＆ngr; d（RN）<18.6，其中＆ngr; d（RN）是第二透镜组内的胶合透镜中负透镜的阿贝数，相对于 d线。
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公开(公告)号：US09798141B2
公开(公告)日：2017-10-24
申请号：US15246864
申请日：2016-08-25
Applicant: FUJIFILM Corporation
Inventor： Keisuke Harada
CPC classification number: G02B27/0101 , G02B5/0278 , G02B2027/015
Abstract: Disclosed is a head-up display capable of achieving reduction in size while securing an optical path length from an image display element to an image reflecting surface. In a head-up display, a reflection optical system has at least three or more mirrors including an l-th mirror, an m-th mirror, and an n-th mirror sequentially in this order from the image display element side along a light beam emitted from the image display element D, the n-th mirror has a refractive power and is arranged closest to the image reflecting surface side among all mirrors, the light beam emitted from the image display element D is reflected from the l-th mirror, the m-th mirror, and the n-th mirror in this order, the light beam emitted from the n-th mirror passes between the l-th mirror and the m-th mirror and reaches the image reflecting surface, and predetermined conditional expressions are further satisfied.
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公开(公告)号：US09709796B2
公开(公告)日：2017-07-18
申请号：US15099672
申请日：2016-04-15
Applicant: FUJIFILM Corporation
Inventor： Keisuke Harada , Michio Cho
CPC classification number: G02B23/243 , G02B13/06
Abstract: An objective lens for endoscopes includes, in order from the object side: a front group; an aperture stop; and a positive rear group. The front group includes, in order from the object side, a negative first lens, in which the absolute value of the radius of curvature of the surface toward the image side is less than that of the surface toward the object side, and at least one plane parallel plate. The rear group includes, in order from the object side, a positive second lens, and a cemented lens formed by a positive third lens and a negative fourth lens. The coupling surface of the cemented lens is convex toward the image side. Conditional Formulae (1) through (3) concerning the plane parallel plates within the front group, the focal length of the first lens, the radius of curvature of the coupling surface of the cemented lens, etc., are satisfied.
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