公开(公告)号：US07525896B2

公开(公告)日：2009-04-28

申请号：US10554533

申请日：2004-04-26

申请人： Yuuichi Takahashi ,  Kazuo Momoo

发明人： Yuuichi Takahashi ,  Kazuo Momoo

IPC分类号： G11B7/00

CPC分类号： G11B7/123 ,  G11B7/1275 ,  G11B7/1367 ,  G11B7/13922 ,  G11B2007/0006

摘要： An optical head comprises first and second light sources which are arranged next to each other and emit lights of different wavelengths and an optical device which is arranged between the first and second light sources and a conversing lens for reducing the spherical aberration caused by combination of the conversing lens and at least one of first and second optical recording media which correspond to at least one of the lights of first and second wavelengths. The optical axis of the optical device is shifted with respect to the optical axis of the conversing lens in order to reduce the coma aberration that is caused since at least one of optical axes of the lights of first and second wavelengths does not coincide with the optical axis of the conversing lens.

摘要翻译： 光头包括彼此相邻布置并发射不同波长的光的第一和第二光源和布置在第一和第二光源之间的光学装置和用于减少由于 转换透镜和对应于第一和第二波长的光中的至少一个的第一和第二光学记录介质中的至少一个。 光学装置的光轴相对于转换透镜的光轴移动，以便减少由于第一和第二波长的光的光轴中的至少一个与光学不一致而引起的彗形像差 交谈镜头的轴。

公开(公告)号：US07463569B2

公开(公告)日：2008-12-09

申请号：US11112998

申请日：2005-04-22

申请人： Seiji Nishiwaki ,  Kazuo Momoo ,  Jun-ichi Asada ,  Kenji Otani ,  Yusuke Kanda

发明人： Seiji Nishiwaki ,  Kazuo Momoo ,  Jun-ichi Asada ,  Kenji Otani ,  Yusuke Kanda

IPC分类号： G11B7/00

CPC分类号： G11B7/1365 ,  G11B7/1353 ,  G11B7/1381

摘要： It is intended to provide an optical disk apparatus which detects a light amount greater than zero even when used in conjunction with an optical disk substrate having a large birefringence, so that it is possible to properly read a signal without errors and properly perform optical disk controls. The optical disk apparatus includes: a light source for emitting light; an objective lens for converging the light onto a signal surface of an optical disk; a polarized beam diffraction element for diffracting the light reflected from the optical disk; a photodetector for detecting the light diffracted from the polarized beam diffraction element; and a wavelength plate disposed between the optical disk and the polarized beam diffraction element. The wavelength plate has a two-dimensional array of a plurality of birefringent regions including first and second regions, the first and second regions differing in birefringent phase difference and/or optic axes from each other, and the plurality of birefringent regions including the first and second regions cause the light to have different polarization states.

摘要翻译： 即使在与具有大双折射性的光盘基板结合使用的情况下，也能够提供大于零的光量的光盘装置，从而可以正确地读取无误信号，适当地执行光盘控制 。 光盘装置包括：用于发光的光源; 用于将光聚焦到光盘的信号表面上的物镜; 用于衍射从光盘反射的光的偏振光束衍射元件; 用于检测从偏振光束衍射元件衍射的光的光检测器; 以及布置在光盘和偏振光束衍射元件之间的波长板。 波长板具有包括第一和第二区域的多个双折射区域的二维阵列，第一和第二区域在双折射相位差和/或光轴上彼此不同，并且多个双折射区域包括第一和第二区域 第二区域导致光具有不同的偏振状态。

公开(公告)号：US07230888B2

公开(公告)日：2007-06-12

申请号：US11112243

申请日：2005-04-22

申请人： Yuuichi Takahashi ,  Kazuo Momoo

发明人： Yuuichi Takahashi ,  Kazuo Momoo

IPC分类号： G11B7/125

CPC分类号： G11B7/127 ,  G01V8/14

摘要： A light emitting device according to the present invention includes: a first light source for emitting light having a first wavelength; and a second light source for emitting light having a second wavelength which is different from the first wavelength, wherein the first light source and the second light source are arranged in the same housing, and a relationship of θh1>θh2 is satisfied, where θh1 denotes an angle (full-width-half-maximum) of radiation of the light emitted from the first light source in the horizontal direction, and θh2 denotes an angle (full-width-half-maximum) of radiation of the light emitted from the second light source in the horizontal direction.

摘要翻译： 根据本发明的发光器件包括：用于发射具有第一波长的光的第一光源; 以及用于发射具有与第一波长不同的第二波长的光的第二光源，其中第一光源和第二光源布置在同一壳体中，并且满足第一光束和第二光源的关系，其中 thetah 1表示从第一光源沿水平方向发射的光的角度（全宽半最大值），并且角度2表示光的辐射角度（全宽半最大值） 从第二光源沿水平方向发射。

公开(公告)号：US07126904B2

公开(公告)日：2006-10-24

申请号：US10255496

申请日：2002-09-26

申请人： Seiji Nishiwaki ,  Kazuo Momoo ,  Yuichi Takahashi ,  Kei Ikeda

发明人： Seiji Nishiwaki ,  Kazuo Momoo ,  Yuichi Takahashi ,  Kei Ikeda

IPC分类号： G11B7/135

CPC分类号： G11B7/1367 ,  G11B7/13922 ,  G11B2007/0006

摘要： A first light ray with a wavelength λ1 emanating from the first emission light source passes through the transparent substrate and is condensed by the objective lens on a signal surface of a first optical disk with a substrate thickness t1, a second light ray with a wavelength λ2 (≠λ1) emanating from the second emission light source passes through the transparent substrate and is condensed by the objective lens on a signal surface of a second optical disk with a substrate thickness t2, a step structure of at least one step is formed along a circle or an ellipse on a surface of the transparent substrate, and and by the step of the step structure, a phase of the first light ray is shifted by 2πn1+Δ1 and a phase of the second light ray is shifted by 2πn2+Δ2.

摘要翻译： 从第一发射光源发出的具有波长λ1的第一光线通过透明基板，并被物镜聚集在具有基板厚度t1的第一光盘的信号表面上，具有波长λ2的第二光线 从第二发光光源发出的光（λ1）通过透明基板并被物镜聚集在具有基板厚度t2的第二光盘的信号表面上，沿着至少一个台阶形成台阶结构 在透明基板的表面上的圆或椭圆，并且通过阶梯结构的步骤，第一光线的相位偏移2pin1 +Δ1，第二光线的相位偏移2pin2 +Δ2 。

公开(公告)号：US20050237902A1

公开(公告)日：2005-10-27

申请号：US11112998

申请日：2005-04-22

申请人： Seiji Nishiwaki ,  Kazuo Momoo ,  Jun-ichi Asada ,  Kenji Otani ,  Yusuke kanda

发明人： Seiji Nishiwaki ,  Kazuo Momoo ,  Jun-ichi Asada ,  Kenji Otani ,  Yusuke kanda

IPC分类号： G11B7/0065 ,  G11B7/135

CPC分类号： G11B7/1365 ,  G11B7/1353 ,  G11B7/1381

摘要： It is intended to provide an optical disk apparatus which detects a light amount greater than zero even when used in conjunction with an optical disk substrate having a large birefringence, so that it is possible to properly read a signal without errors and properly perform optical disk controls. The optical disk apparatus includes: a light source for emitting light; an objective lens for converging the light onto a signal surface of an optical disk; a polarized beam diffraction element for diffracting the light reflected from the optical disk; a photodetector for detecting the light diffracted from the polarized beam diffraction element; and a wavelength plate disposed between the optical disk and the polarized beam diffraction element. The wavelength plate has a two-dimensional array of a plurality of birefringent regions including first and second regions, the first and second regions differing in birefringent phase difference and/or optic axes from each other, and the plurality of birefringent regions including the first and second regions cause the light to have different polarization states.

摘要翻译： 即使在与具有大双折射性的光盘基板结合使用的情况下，也能够提供大于零的光量的光盘装置，从而可以正确地读取无误信号，适当地执行光盘控制 。 光盘装置包括：用于发光的光源; 用于将光聚焦到光盘的信号表面上的物镜; 用于衍射从光盘反射的光的偏振光束衍射元件; 用于检测从偏振光束衍射元件衍射的光的光检测器; 以及布置在光盘和偏振光束衍射元件之间的波长板。 波长板具有包括第一和第二区域的多个双折射区域的二维阵列，第一和第二区域在双折射相位差和/或光轴上彼此不同，并且多个双折射区域包括第一和第二区域 第二区域导致光具有不同的偏振状态。

公开(公告)号：US06909685B2

公开(公告)日：2005-06-21

申请号：US09788367

申请日：2001-02-21

申请人： Seiji Nishiwaki ,  Kazuo Momoo ,  Junji Nagaoka

发明人： Seiji Nishiwaki ,  Kazuo Momoo ,  Junji Nagaoka

IPC分类号： G11B7/24 ,  G11B7/004 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/24085 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/0901 ,  G11B7/0943 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/1381 ,  G11B7/24088

摘要： An optical disk device has a light source which emits light; and light converging means of, in each of signal mark forming regions, each of lands, or each of grooves of an optical disk, converging the light from the light source onto a signal surface of the optical disk with selectively positioning a signal mark at any one of plural positions which are arranged in a direction that is substantially perpendicular to tracks, each of the signal mark forming regions surrounded by adjacent two of boarder lines which are between two the tracks on the signal surface of the optical disk, and which are substantially parallel to the tracks, and each of which substantially divides an area between adjacent tracks in two parts.

摘要翻译： 光盘装置具有发光的光源; 以及在每个信号标记形成区域中的光会聚装置，每个光阑的凹槽或每个凹槽中，将来自光源的光会聚到光盘的信号表面上，并选择性地将信号标记定位在任何 多个位置中的一个被布置在基本上垂直于轨道的方向上，每个信号标记形成区被围绕在光盘的信号表面上的两个轨道之间的相邻的两个边缘线包围，并且基本上 平行于轨道，并且其中的每一个在两个部分中基本上划分相邻轨道之间的区域。

公开(公告)号：US5091793A

公开(公告)日：1992-02-25

申请号：US634849

申请日：1990-12-27

申请人： Shoji Goto ,  Akihiro Sakata ,  Hiroshi Yamamoto ,  Tetsuo Saimi ,  Kazuo Momoo

发明人： Shoji Goto ,  Akihiro Sakata ,  Hiroshi Yamamoto ,  Tetsuo Saimi ,  Kazuo Momoo

IPC分类号： G11B7/12 ,  G11B7/22

CPC分类号： G11B7/12

摘要： An optical head for recording and reproducing information on an optical disk includes a box-like cover carrying thereon a semiconductor laser unit and a detector, and a substantially planar base on which various optical components are bonded, the base being made of the same material as the box-like cover and secured to the box-like cover to close an open end of the latter. By the use of the planar base, the optical components and the base can be bonded efficiently with utmost ease.