公开(公告)号：US20080310284A1

公开(公告)日：2008-12-18

申请号：US12179751

申请日：2008-07-25

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

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

IPC: G11B7/00

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 Λ 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，但是衍射第三波长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：<βin-line-formula description = “In-line Formulas”end =“lead”？>λ/λ> = 8 <？in-line-formula description =“In-line Formulas”end =“tail”？>其中Lambda表示该情况下的最小间距 当由每个衍射表面中的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被定义为一个间距，并且λ表示 衍射光的波长。

公开(公告)号：US07463570B2

公开(公告)日：2008-12-09

申请号：US11098842

申请日：2005-04-04

Applicant: Tohru Kimura ,  Junji Hashimura

Inventor： Tohru Kimura ,  Junji Hashimura

IPC: G11B7/00

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波长λ1的第一光通量记录和/或再现信息的光学拾取装置的多焦点物镜包括包括第一衍射结构的第一光学表面。 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：US20060164954A1

公开(公告)日：2006-07-27

申请号：US11332152

申请日：2006-01-17

Applicant: Junji Hashimura

Inventor： Junji Hashimura

IPC: G11B7/00

CPC classification number: G11B7/1275 ,  G11B7/0935 ,  G11B7/1374 ,  G11B2007/0006

Abstract: In an optical pickup apparatus for reproducing and/or recording information from/onto four kinds of optical information recording mediums, an optical path of a light flux entering to a first objective optical element when using the first objective optical element and an optical path of a light flux entering to a second objective optical element when using a second objective optical element are arranged to be different so that a position of an incident light flux entering into the first objective optical element when using the first objective lens and a position of an incident light flux entering into the second objective optical element when using the second objective optical element are different in an orthogonal direction to an optical axis.

Abstract translation: 在用于从四种光学信息记录介质再现和/或记录信息的光学拾取装置中，当使用第一物镜光学元件时入射到第一物镜光学元件的光束的光路和 当使用第二物镜光学元件时入射到第二物镜光学元件的光束被布置成不同，使得当使用第一物镜时进入第一物镜光学元件的入射光束的位置和入射光的位置 在使用第二物镜光学元件时进入第二物镜光学元件的光束在与光轴正交的方向上不同。

公开(公告)号：US20050226124A1

公开(公告)日：2005-10-13

申请号：US11100389

申请日：2005-04-07

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

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

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

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: 用于光学拾取装置的物镜系统包括从物体侧开始的顺序：具有负的近轴光焦度P 1（mm -1）的第一透镜组; 以及具有正的近轴光焦度P 2（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的信息记录表面上 记录介质。

公开(公告)号：US20050219987A1

公开(公告)日：2005-10-06

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 ,  G11B7/00 ,  G11B7/125

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具有第一波长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）的第二光通量的第二光源， 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，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：US20050213469A1

公开(公告)日：2005-09-29

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: G02B26/10 ,  G02B3/06 ,  G02B13/00 ,  G02B27/09 ,  G11B7/00 ,  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：US5978149A

公开(公告)日：1999-11-02

申请号：US946155

申请日：1997-10-07

Applicant: Junji Hashimura ,  Hiromu Mukai ,  Hideki Nagata

Inventor： Junji Hashimura ,  Hiromu Mukai ,  Hideki Nagata

IPC: G03C3/00 ,  G02B15/14 ,  G02B15/16

CPC classification number: G02B15/14

Abstract: A zoom lens system includes two lens components, and zooming is performed by moving a first lens component. The zooming is performed along a zoom curve such that the first lens component is moved out so that in-focus condition is obtained at a subject distance predetermined with respect to each focal length. As the subject distance, an excess focal length or a subject distance where the far side of the depth of field is the maximum flash reachable distance or a subject distance where the near side of the depth of field is the shortest object distance or a subject distance where the object distance or the magnification is fixed is set according to the purpose.

Abstract translation: 变焦透镜系统包括两个透镜部件，并且通过移动第一透镜部件来执行变焦。 沿着变焦曲线进行变焦，使得第一透镜部件被移出，使得在相对于每个焦距预定的被摄体距离处获得对焦条件。 作为被摄体距离，景深的远侧是最大闪光可到达距离的多余焦距或被摄体距离或景深近侧为最短对象距离或被摄体距离的被摄体距离 根据目的设定对象距离或放大率固定的位置。

公开(公告)号：US5168403A

公开(公告)日：1992-12-01

申请号：US623298

申请日：1990-12-06

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

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

IPC: G02B13/18 ,  G02B15/16 ,  G02B27/46 ,  G03B5/00

CPC classification number: G02B15/16

Abstract: A zoom lens system comprises from the object side, a front lens group having a refractive power of a predetermined sign and a rear lens group having a refractive power of different sign from that of the front lens group. The front lens group is shiftable along the optical axis of the lens system in a zooming operation, and movable perpendicularly to the optical axis for decreasing a blur caused by a hand shake. The rear lens group is shiftable along the optical axis in the zooming operation.

Abstract translation: 变焦透镜系统包括物体侧具有预定符号的折射力的前透镜组和具有与前透镜组的折射力不同的折光力的后透镜组。 前透镜组可以在变焦操作中沿着透镜系统的光轴移动，并且可垂直于光轴移动，以减少由手摇引起的模糊。 在变焦操作中，后透镜组可沿光轴移动。

公开(公告)号：US20050249097A1

公开(公告)日：2005-11-10

申请号：US11122003

申请日：2005-05-05

Applicant: Junji Hashimura ,  Shinichiro Saito ,  Tohru Kimura

Inventor： Junji Hashimura ,  Shinichiro Saito ,  Tohru Kimura

IPC: G11B7/00 ,  G11B7/135

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

Abstract: An optical pickup apparatus for recording/reproducing information onto/from a first and a second optical information recording media respectively having a first and second protective layers with a thickness of t1 and t2, using first light beams having a wavelength λ1, the optical pickup apparatus comprises, a first light source having the wavelength of λ1, a first and a second objective optical elements, wherein when recording/reproducing the information onto/from the first optical information recording media, one of the first and the second objective optical lenses is used to condense the first light beams onto a first information recording surface and when recording/reproducing the information onto/from the second optical information recording medium, the other objective optical lens is used to condense the first light beams onto a second information recording surface, wherein the thickness of t1 and the thickness of t2 satisfy a following formula, 2.5

Abstract translation: 一种光拾取装置，用于使用分别具有厚度为t1和t2的第一和第二保护层的第一和第二光学信息记录介质，使用具有波长λ1的第一光束来记录/再现信息，光学拾取装置 包括具有λ1波长的第一光源，第一和第二物镜光学元件，其中当在第一光学信息记录介质上记录/再现信息时，使用第一和第二物镜光学透镜中的一个 将第一光束冷凝到第一信息记录表面上，并且当将信息记录/再现到第二光学信息记录介质上时，另一个物镜光学透镜用于将第一光束冷凝到第二信息记录表面上，其中 t1的厚度和t2的厚度满足下式，2.5

公开(公告)号：US20050219988A1

公开(公告)日：2005-10-06

申请号：US11092896

申请日：2005-03-30

Applicant: Yuichi Atarashi ,  Kohei Ota ,  Katsuya Yagi ,  Junji Hashimura ,  Tohru Kimura ,  Katsuya Sakamoto

Inventor： Yuichi Atarashi ,  Kohei Ota ,  Katsuya Yagi ,  Junji Hashimura ,  Tohru Kimura ,  Katsuya Sakamoto

IPC: G11B7/09 ,  G11B7/00 ,  G11B7/125 ,  G11B7/1275 ,  G11B7/135 ,  G11B7/1369 ,  G11B7/1378 ,  G11B7/1392

CPC classification number: G11B7/13927 ,  G11B7/1275 ,  G11B7/1369 ,  G11B7/1378 ,  G11B2007/0006

Abstract: An optical pickup apparatus comprises a first, second and third light beam sources for emitting first light beams having wavelengths λ1, λ2 and λ3 (λ1

Abstract translation: 光拾取装置包括第一，第二和第三光束源，用于发射分别具有第一，第二和第二记录介质的第一，第二和第三记录介质的具有波长λ1，λ2和λ3（λ1<λ2λ）的第一光束， 具有厚度t1，t2和t3的第三保护层，用于将第一，第二和第三光束会聚到第一，第二和第三记录介质的各个记录表面上的物镜光学透镜，用于使目标移动的跟踪装置 光学透镜，用于改变能够在光轴方向上移动并放置在光路中的光束的发散角的第一发散角度改变元件和用于校正当跟踪装置产生的彗形像差的彗形像差校正元件 移动物镜光学元件。