公开(公告)号：US20050213224A1

公开(公告)日：2005-09-29

申请号：US10952282

申请日：2004-09-27

Applicant: Kazunari Tada ,  Junji Hashimura ,  Yuichiro Ori

Inventor： Kazunari Tada ,  Junji Hashimura ,  Yuichiro Ori

IPC: G02B13/18 ,  G02B3/06 ,  G02B3/08 ,  G02B13/00 ,  G02B27/09 ,  G11B7/135

CPC classification number: G02B27/0966 ,  G02B19/0014 ,  G02B19/0052

Abstract: In a beam shaping device for converting the laser light emitted from a semiconductor laser light source from an elliptic beam to a circular beam, the light-entrance-side and light-exit-side surfaces of the beam shaping device both have a curvature only in the major-axis direction of the cross section of the elliptic beam. Of the light-entrance-side and light-exit-side surfaces, one is a circular-arc cylindrical surface and the other is a non-circular-arc cylindrical surface.

Abstract translation: 在用于将从半导体激光源发射的激光从椭圆光束转换成圆形光束的光束整形装置中，光束成形装置的光入射侧和光出射侧表面仅在 椭圆光束横截面的长轴方向。 在光入射侧和光出射侧表面中，一个是圆弧形圆柱形表面，另一个是非圆弧形圆柱形表面。

公开(公告)号：US20050201250A1

公开(公告)日：2005-09-15

申请号：US11076232

申请日：2005-03-10

Applicant: Mitsuru Mimori ,  Junji Hashimura ,  Kiyono Ikenaka

Inventor： Mitsuru Mimori ,  Junji Hashimura ,  Kiyono Ikenaka

IPC: G02B5/18 ,  G02B13/18 ,  G11B7/00 ,  G11B7/135

CPC classification number: G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An objective optical element for use in an optical pickup apparatus first-third light sources emitting first-third light fluxes and a light converging optical system, includes a first optical path difference providing structure for providing an optical path difference which provides a substantial phase change to the third light flux and does not provide a substantial phase change to the first and second light fluxes; and a second optical path difference providing structure for providing an optical path difference to the first light flux, the second light flux and the third light flux, wherein the objective optical element converges the first-third light fluxes through the protective layers with the thicknesses t1-t3 onto an information recording surface of the first-third optical information media respectively.

Abstract translation: 一种用于光拾取装置的发射第一和第三光束的第一和第三光源的物镜光学元件包括：第一光程差提供结构，用于提供光路差异， 第三光束并且不提供对第一和第二光束的实质相位变化; 以及用于向第一光束，第二光束和第三光束提供光路差的第二光程差提供结构，其中物镜光学元件使第一至第三光束通过保护层会聚，厚度为t1 -t3分别在第一至第三光学信息介质的信息记录表面上。

公开(公告)号：US20050105446A1

公开(公告)日：2005-05-19

申请号：US10987853

申请日：2004-11-12

Applicant: Katsuya Sakamoto ,  Junji Hashimura ,  Kiyono Ikenaka

Inventor： Katsuya Sakamoto ,  Junji Hashimura ,  Kiyono Ikenaka

IPC: G11B7/00

CPC classification number: G11B7/13927 ,  G11B7/1356 ,  G11B7/1376 ,  G11B7/1378 ,  G11B7/1398 ,  G11B2007/0006

Abstract: This invention provides an optical pickup apparatus which includes a plurality of light sources, a beam shaping element which is arranged in an optical path through which a light beam emitted from at least one of the light sources passes, and an optical system which includes a divergence angle conversion element and an objective lens and is arranged in an optical path through which the light beams emitted from the plurality of light sources pass, and records and/or reproduces information by condensing, through the objective lens, the light beam emitted from each light source on the information recording surface of a corresponding optical information recording medium. An almost elliptical cross-sectional shape of the light beam which enters the beam shaping element is shaped into a cross-sectional shape closer to an almost circular shape or a circular shape, and the light beam emerges from the beam shaping element. The light beam which enters the divergence angle conversion element emerges from it with a reduced angle or degree of divergence.

Abstract translation: 本发明提供了一种包括多个光源的光学拾取装置，一个光束整形元件，其布置在从至少一个光源发射的光束通过的光路中，以及包括发散的光学系统 角度转换元件和物镜，并且被布置在从多个光源发射的光束通过的光路中，并且通过物镜通过聚光来记录和/或再现从每个光发射的光束的信息 源在相应的光学信息记录介质的信息记录表面上。 进入光束成形元件的光束的近似椭圆形的横截面形状被成形为更接近于几乎圆形或圆形的横截面形状，并且光束从光束成形元件出射。 进入发散角转换元件的光束以减小的角度或发散度出现。

公开(公告)号：US06714330B2

公开(公告)日：2004-03-30

申请号：US10104065

申请日：2002-03-25

Applicant: Junji Hashimura

Inventor： Junji Hashimura

IPC: G02B2608

CPC classification number: G02B26/105

Abstract: A scanning optical system has an object side lens unit for condensing light from an object, a mirror for performing a main scan to read the image of the object by deflecting the light transmitted through the object side lens and an image side lens unit for forming an image on the image sensing surface using both the extra-axial light and axial light in a subscan direction deflected by the mirror. The scanning optical system satisfies the predetermined condition defined by lenses of Abbe number.

Abstract translation: 扫描光学系统具有用于聚集来自物体的光的物体侧透镜单元，用于执行主扫描的反射镜，以通过偏转透过物体侧透镜的光来偏转对象的图像，以及用于形成物体侧透镜单元 使用在镜面偏转的副扫描方向上的外光和轴向光，在图像感测表面上的图像。 扫描光学系统满足由阿贝数的透镜限定的预定条件。

公开(公告)号：US6166862A

公开(公告)日：2000-12-26

申请号：US99276

申请日：1998-06-18

Applicant: Junji Hashimura ,  Yuichiro Ori

Inventor： Junji Hashimura ,  Yuichiro Ori

IPC: G02B13/18 ,  G02B3/00 ,  G02B15/14 ,  G02B15/16 ,  G06F17/11 ,  G06F17/50

CPC classification number: G02B27/0012 ,  G02B15/14

Abstract: A designing method of a zoom optical system wherein each zoom unit is formed of one optical element has steps of: selecting a spherical system, a gradient index system or a diffractive optical system and at least one more system as systems constituting the degree of design freedom of each zoom unit, optimizing each zoom unit with respect to third-order aberrations and chromatic aberration; and using an optical solution obtained by said optimizing step as the design start data.

Abstract translation: 变焦光学系统的设计方法，其中每个变焦单元由一个光学元件形成具有以下步骤：选择球面系统，梯度折射系统或衍射光学系统以及至少一个更多的系统作为构成设计自由度的系统 每个变焦单元相对于三次像差和色差优化每个变焦单元; 并且使用由所述优化步骤获得的光学解决方案作为设计开始数据。

公开(公告)号：US5978154A

公开(公告)日：1999-11-02

申请号：US874921

申请日：1997-06-13

Applicant: Junji Hashimura

Inventor： Junji Hashimura

IPC: G02B13/18 ,  G02B3/00 ,  G02B15/16 ,  G02B15/20 ,  G02B15/14

CPC classification number: G02B15/161

Abstract: The object of the present invention is to provide a high-performance zoom lens system that having a small number of lens elements and can also be used for wide-angle purpose. In order to achieve the object, said zoom lens system has, from the object side, a first lens unit having positive refractive power and a second lens unit having negative refractive power, wherein said zoom lens system varies magnification by changing a distance between at least said first and second lens unit, wherein at least one of said lens units includes a gradient index lens, said gradient index lens having at least one aspherical surface.

Abstract translation: 本发明的目的是提供一种具有少量透镜元件并且也可用于广角目的的高性能变焦透镜系统。 为了实现该目的，所述变焦透镜系统从物体侧具有具有正屈光力的第一透镜单元和具有负屈光力的第二透镜单元，其中所述变焦透镜系统通过改变至少 所述第一和第二透镜单元，其中所述透镜单元中的至少一个包括梯度折射率透镜，所述梯度折射率透镜具有至少一个非球面。

公开(公告)号：US5973849A

公开(公告)日：1999-10-26

申请号：US571642

申请日：1995-12-13

Applicant: Junji Hashimura

Inventor： Junji Hashimura

IPC: G02B3/00 ,  G02B15/16 ,  G02B15/14

CPC classification number: G02B15/161 ,  G02B3/0087

Abstract: A zoom lens system has a plurality of lens units. Zooming is performed by varying distances between the lens units. A gradient index lens is included in the lens units. The gradient index lens has a gradient index in a direction vertical to an optical axis. The gradient index lens has at least one aspherical surface.

Abstract translation: 变焦透镜系统具有多个透镜单元。 通过镜头单元之间的距离变化来进行变焦。 透镜单元中包含渐变折射率透镜。 梯度折射率透镜在垂直于光轴的方向上具有梯度指数。 梯度折射率透镜具有至少一个非球面。

公开(公告)号：US5153777A

公开(公告)日：1992-10-06

申请号：US622715

申请日：1990-12-05

Applicant: Takashi Okada ,  Akira Fukushima ,  Hiromu Umeda ,  Hisashi Tokumaru ,  Junji Hashimura ,  Hisayuki Masumoto

Inventor： Takashi Okada ,  Akira Fukushima ,  Hiromu Umeda ,  Hisashi Tokumaru ,  Junji Hashimura ,  Hisayuki Masumoto

IPC: G02B13/18 ,  G02B15/16 ,  G02B15/173

CPC classification number: G02B15/173

Abstract: A compact-size, light-weight, low-cost zoom lens system with high optical quality is achieved by using a ray restrictor placed at the most object side of the zoom lens system. In one type, the ray resistor shifts toward the object at a speed different from that of the most object side lens of the zoom lens system as the zoom lens system is zoomed toward the longest focal length, which effectively blocks harmful rays causing coma flare in the peripheral area. In another type, the aperture diameter of the ray restrictor varies according to a zooming operation. The ray restrictor of any type is especially effective when used in a zoom lens system composed of two lens groups. By introducing one or more aspherical surfaces satisfying a certain condition (or conditions) in the zoom lens system, various aberrations are further favorably corrected.

Abstract translation: 通过使用放置在变焦透镜系统的最物体侧的射线限制器来实现具有高光学质量的紧凑型，重量轻，低成本的变焦透镜系统。 在一种类型中，随着变焦透镜系统朝向最长焦距变焦，射线电阻以与变焦透镜系统的最物体侧透镜的速度不同的速度朝向物体移动，这有效地阻挡了导致昏迷的有害射线 周边地区。 在另一种类型中，光线限制器的孔径根据变焦操作而变化。 当用于由两个透镜组组成的变焦透镜系统中时，任何类型的光线限制器是特别有效的。 通过在变焦透镜系统中引入满足一定条件（或条件）的一个或多个非球面，可进一步有利地校正各种像差。

公开(公告)号：US20120155241A1

公开(公告)日：2012-06-21

申请号：US13407405

申请日：2012-02-28

Applicant: Kohei OTA ,  Nobuyoshi MORI ,  Junji HASHIMURA ,  Tohru KIMURA ,  Kiyono IKENAKA ,  Katsuya SAKAMOTO ,  Eiji NOMURA

Inventor： Kohei OTA ,  Nobuyoshi MORI ,  Junji HASHIMURA ,  Tohru KIMURA ,  Kiyono IKENAKA ,  Katsuya SAKAMOTO ,  Eiji NOMURA

IPC: G11B7/1353

CPC classification number: G11B7/1367 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An optical pickup apparatus includes: a first light source for emitting a first light flux; a second light source for emitting a second light flux; a third light source for emitting a third light flux; and an objective optical unit having a first optical path difference providing structure and a second optical path difference providing structure. Magnifications of the objective optical unit for the first-third light fluxes have almost same value. The first optical path difference providing structure provides a predefined optical path difference and changes a spherical aberration to be one of under-correction and over-correction for all of the first light flux, the second light flux, and the third light flux. The second optical path difference providing structure provides a predefined optical path difference and changes a spherical aberration to be the other of under-correction and over-correction of the spherical aberration only for the second light flux.

Abstract translation: 一种光学拾取装置包括：用于发射第一光通量的第一光源; 用于发射第二光通量的第二光源; 用于发射第三光通量的第三光源; 以及具有第一光程差提供结构和第二光程差提供结构的物镜光学单元。 用于第一至第三光束的物镜光学单元的放大率具有几乎相同的值。 第一光程差提供结构提供预定的光程差，并且将球面像差改变为对于所有第一光通量，第二光通量和第三光通量的校正和过校正之一。 第二光程差提供结构提供预定的光程差，并且将球面像差改变为仅用于第二光通量的球面像差的校正不足和过校正。

公开(公告)号：US08077585B2

公开(公告)日：2011-12-13

申请号：US12493669

申请日：2009-06-29

Applicant: Tohru Kimura ,  Junji Hashimura ,  Yuichi Atarashi ,  Toshiyuki Kojima

Inventor： Tohru Kimura ,  Junji Hashimura ,  Yuichi Atarashi ,  Toshiyuki Kojima

IPC: G11B7/00

CPC classification number: G11B7/1374 ,  G11B7/1378 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: An objective lens system for an optical pickup apparatus, includes in order from an object side: a first lens group having negative paraxial power P1 (mm−1); and a second lens group having positive paraxial power P2 (mm−1) for converging a light flux emitted from the first lens group on an information recording surface of an optical information recording medium.

Abstract translation: 一种用于光学拾取装置的物镜系统，从物体侧依次包括具有负近轴功率P1（mm-1）的第一透镜组; 以及具有正的近轴光焦度P2（mm-1）的第二透镜组，用于将从第一透镜组发射的光束会聚在光学信息记录介质的信息记录表面上。