公开(公告)号：US07924683B2

公开(公告)日：2011-04-12

申请号：US11092791

申请日：2005-03-30

Applicant: Junji Hashimura ,  Tohru Kimura ,  Mitsuru Mimori

Inventor： Junji Hashimura ,  Tohru Kimura ,  Mitsuru Mimori

IPC: G11B7/135

CPC classification number: G11B7/1367 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1378 ,  G11B7/13927 ,  G11B2007/0006

Abstract: An optical pickup apparatus comprises a first light source for emitting a first light flux having first wavelength λ1 (430 nm>λ1>380 nm), a second light source for emitting a second light flux having second wavelength λ2 (λ2>λ1), an objective optical system having phase structure thereon, and at least one moving optical element for guiding the light flux into the objective optical system, the moving optical element being moved in a direction parallel to an optical axis corresponding to the first light wavelength λ1 and the second light wavelength λ2, wherein the objective optical system has phase structure and satisfies M1=M2=0, where, M1 and M2 denote a first and second magnifications of the objective optical system for recording and/or reproducing the information on or from the first and second optical information media.

Abstract translation: 光拾取装置包括用于发射第一波长λ1（430nm>λ1> 380nm）的第一光束的第一光源，用于发射具有第二波长λ2（λ2>λ1）的第二光束的第二光源， 具有相位结构的物镜光学系统和用于将光束引导到物镜光学系统中的至少一个移动光学元件，所述移动光学元件在平行于对应于第一光波长λ1的光轴的方向上移动，第二 光波长λ2，其中物镜光学系统具有相位结构并且满足M1 = M2 = 0，其中，M1和M2表示物镜光学系统的第一和第二放大率，用于在第一和第二和/ 第二光信息媒体。

公开(公告)号：US07558180B2

公开(公告)日：2009-07-07

申请号：US10532602

申请日：2004-08-10

Applicant: Katsuya Sakamoto ,  Junji Hashimura

Inventor： Katsuya Sakamoto ,  Junji Hashimura

IPC: G11B7/135

CPC classification number: G11B7/1398 ,  G02B7/028 ,  G02B27/0966 ,  G11B7/1378 ,  G11B7/13922 ,  G11B2007/13727

Abstract: The present invention has a beam shaping element for converting the light source 11 into a light flux whose emitting angle is almost equal and for projecting it, and a generation amount of the astigmatism generated by the temperature change is suppressed by a linear expansion of the beam shaping element.

Abstract translation: 本发明具有用于将光源11转换为发射角几乎相等并用于投射光束的光束成形元件，并且通过光束的线性膨胀来抑制由温度变化产生的像散的产生量 成型元件。

公开(公告)号：US07379411B2

公开(公告)日：2008-05-27

申请号：US10952150

申请日：2004-09-27

Applicant: Kazunari Tada ,  Junji Hashimura ,  Yuichiro Ori

Inventor： Kazunari Tada ,  Junji Hashimura ,  Yuichiro Ori

IPC: G11B7/135

CPC classification number: G02B27/0966 ,  G02B19/0014 ,  G02B19/0052 ,  G11B7/1378 ,  G11B7/13922 ,  G11B7/1398

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 minor-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. The beam shaping device fulfills prescribed conditions with respect to the center thickness, surface shapes, and/or other features.

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 椭圆梁的横截面的短轴方向。 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。 光束成形装置相对于中心厚度，表面形状和/或其他特征实现规定的条件。

公开(公告)号：US07116493B2

公开(公告)日：2006-10-03

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: G02B3/02 ,  G02B13/08

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 椭圆形横截面的长轴方向。 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：US20050226123A1

公开(公告)日：2005-10-13

申请号：US11098842

申请日：2005-04-04

Applicant: Tohru Kimura ,  Junji Hashimura

Inventor： Tohru Kimura ,  Junji Hashimura

IPC: G02B3/08 ,  G02B3/10 ,  G02B5/18 ,  G02B13/00 ,  G02B13/18 ,  G11B7/00 ,  G11B7/135

CPC classification number: G11B7/1374 ,  G02B3/08 ,  G02B3/10 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1378 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: A multi-focal objective lens for use in an optical pickup apparatus for recording and/or reproducing information using a first light flux with a wavelength λ1 on a first and second optical discs, includes a first optical surface including a first diffractive structure. The multi-focal objective lens converges a diffracted light flux with one of the m-th diffraction order and the n-th diffraction order on an information recording surface of the first optical disc for recording and/or reproducing information of the first optical disc, and converges a diffracted light flux with another of the m-th diffraction order and the n-th diffraction order on an information recording surface of the second optical disc for recording and/or reproducing information of the second optical disc.

Abstract translation: 用于在第一和第二光盘上使用具有波长λ1的第一光通量记录和/或再现信息的光学拾取装置中的多焦点物镜包括第一光学表面 包括第一衍射结构。 多焦点物镜将第m衍射级和第n衍射级中的一个的衍射光束会聚在第一光盘的信息记录表面上，用于记录和/或再现第一光盘的信息， 并且将衍射光束与第二光盘的信息记录表面上的第m衍射级和第n衍射级的另一个会聚在一起，用于记录和/或再现第二光盘的信息。

公开(公告)号：US06922289B2

公开(公告)日：2005-07-26

申请号：US10438135

申请日：2003-05-14

Applicant: Junji Hashimura ,  Kyu Takada

Inventor： Junji Hashimura ,  Kyu Takada

IPC: G02B13/00 ,  G02B3/04 ,  G02B13/18 ,  G11B7/135 ,  G02B21/02

CPC classification number: G11B7/1374 ,  G02B3/04 ,  G11B7/13922

Abstract: An objective lens system for optical pickups reading and/or writing information by condensing a luminous flux from a light source onto an optical information recording medium, consists of, a single lens having, from a light source side, a first surface convex to the light source side and a second surface convex to an image side. A medium of the single lens is a homogeneous medium. At least one of the two surfaces is aspherical. The system satisfies the predetermined conditions.

Abstract translation: 用于光学拾取器的物镜系统通过将来自光源的光通量聚光到光学信息记录介质上来读取和/或写入信息，包括从光源侧具有凸起到光的第一表面的单透镜 源极侧和向图像侧凸出的第二表面。 单透镜的介质是均匀的介质。 两个表面中的至少一个是非球面的。 该系统满足预定条件。

公开(公告)号：US20050063282A1

公开(公告)日：2005-03-24

申请号：US10942460

申请日：2004-09-16

Applicant: Kyu Takada ,  Junji Hashimura ,  Yuichiro Ori ,  Toru Kimura

Inventor： Kyu Takada ,  Junji Hashimura ,  Yuichiro Ori ,  Toru Kimura

IPC: G02B5/18 ,  G11B7/00 ,  G11B7/135 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1392

CPC classification number: G11B7/1353 ,  G02B3/08 ,  G02B13/003 ,  G02B13/0045 ,  G02B13/0055 ,  G02B13/0065 ,  G11B7/1367 ,  G11B7/13922 ,  G11B7/13925 ,  G11B2007/0006

Abstract: An optical pickup apparatus includes a diffractive optical element, and an objective lens that focuses a light beam of a first wavelength λ1, a light beam of a second wavelength λ2 and a light beam of a third wavelength λ3 on a first recording medium, a second recording medium, and a third recording medium, respectively, the wavelengths λ1, λ2, and λ3 being different from each other. The diffractive optical element includes a first diffractive surface that neither diffracts the light beam of the first wavelength λ1 nor the light beam of the third wavelength λ3 but diffracts the light beam of the second wavelength λ2, and a second diffractive surface that neither diffracts the light beam of the first wavelength λ1 nor the light beam of the second wavelength λ2 but diffracts the light beam of the third wavelength λ3, and each of the first and second diffractive surfaces satisfies the following condition inequality: Λ/λ≧8 wherein A represents the minimum pitch in the case that the width which generates a phase difference of one wavelength when the closest wavefronts resulting from adjacent steps in each of the diffractive surfaces are linked with each other is defined as one pitch, and λ represents the wavelength of the diffracted light.

Abstract translation: 光拾取装置包括衍射光学元件和将第一波长λ1的光束，第二波长λ2的光束和第三波长λ3的光束的光束聚焦在第一记录介质上的物镜，第二 记录介质和第三记录介质，波长λ1，λ2和λ3彼此不同。 衍射光学元件包括：第一衍射面，其既不衍射第一波长λ1的光束也不衍射第三波长λ3的光束，但衍射第二波长λ2的光束;以及第二衍射面，其不衍射光 第一波长λ1的光束和第二波长λ2的光束，但衍射第三波长λ3的光束，并且第一和第二衍射面中的每一个满足以下条件不等式：λλ= 8其中A表示 当在每个衍射表面中由相邻步骤产生的最接近的波前相互连接时产生一个波长的相位差的宽度的情况下的最小间距被定义为一个间距，并且λ表示衍射的波长 光。

公开(公告)号：US06781767B2

公开(公告)日：2004-08-24

申请号：US09957168

申请日：2001-09-19

Applicant: Junji Hashimura ,  Masaya Kinoshita ,  Kenji Hamada

Inventor： Junji Hashimura ,  Masaya Kinoshita ,  Kenji Hamada

IPC: G02B1522

CPC classification number: G02B15/177 ,  G02B15/173

Abstract: A zoom optical system has a focus adjusting unit that performs focusing for an object by moving along an optical axis thereof and a magnification adjusting unit that corrects a change in optical magnification caused by the focusing by moving along an optical axis thereof.

Abstract translation: 变焦光学系统具有聚焦调整单元，其通过沿其光轴移动来对物体进行聚焦;以及倍率调节单元，其通过沿其光轴移动来校正由聚焦引起的光学倍率的变化。

公开(公告)号：US5986818A

公开(公告)日：1999-11-16

申请号：US573324

申请日：1995-12-15

Applicant: Junji Hashimura

Inventor： Junji Hashimura

IPC: G02B13/18 ,  G02B3/00 ,  G02B3/02 ,  G02B15/16 ,  G02B1/10 ,  G02B15/14

CPC classification number: G02B3/0087

Abstract: A gradient index lens has a base lens and a resin layer. The resin layer is formed on a surface of the base lens. The resin layer has an aspherical surface. The base lens has a gradient index.

Abstract translation: 梯度折射率透镜具有基底透镜和树脂层。 树脂层形成在基底透镜的表面上。 树脂层具有非球面。 底座镜片具有梯度指数。

公开(公告)号：US5923478A

公开(公告)日：1999-07-13

申请号：US874916

申请日：1997-06-13

Applicant: Junji Hashimura

Inventor： Junji Hashimura

IPC: G02B13/18 ,  G02B15/14 ,  G02B15/173

CPC classification number: G02B15/173

Abstract: The object of the present invention is to provide a high-performance zoom lens system that has 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, a second lens unit having negative refractive power, a third lens unit having positive refractive power and a fourth lens unit having positive refractive power, wherein said zoom lens system varies magnification by changing a distance between at least said first and second lens units, 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的高性能变焦透镜系统，并且也可以用于广角目的。 为了实现该目的，所述变焦透镜系统从物体侧具有正屈光力的第一透镜单元，具有负屈光力的第二透镜单元，具有正屈光力的第三透镜单元和具有正屈光力的第四透镜单元， 正折射力，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之间的距离来改变放大率，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。