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    Optical disc drive
    4.
    发明授权
    Optical disc drive 有权
    光盘驱动器

    公开(公告)号：US06477129B2

    公开(公告)日：2002-11-05

    申请号：US09794913

    申请日：2001-02-28

    申请人： Koichi Maruyama ,  Takeshi Shimano ,  Shigeru Nakamura ,  Akira Arimoto ,  Kazuo Shigematsu

    发明人： Koichi Maruyama ,  Takeshi Shimano ,  Shigeru Nakamura ,  Akira Arimoto ,  Kazuo Shigematsu

    IPC分类号： G11B700

    CPC分类号： G11B7/1374 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0916 ,  G11B7/12 ,  G11B7/123 ,  G11B7/127 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/139 ,  G11B2007/0006 ,  G11B2007/13727

    摘要： An optical disc drive using either one of a first disc (e.g., DVD) and a second disc (e.g., CD), is provided with a first laser diode that emits a shorter wavelength beam, a second laser diode that emits a longer wavelength beam, an objective lens, and a driving unit that holds and rotates the optical disc. The optical axis of the objective lens is inclined relative to a normal to the optical disc. The first laser diode is located at a first position so that the coma, which is caused when the first laser beam is converged on a data recording surface of the first disc, is minimized, and the second laser diode is located at a second position so that the coma, which is caused when the second laser beam is converged on a data recording surface of the second disc, is minimized.

    摘要翻译： 使用第一盘（例如DVD）和第二盘（例如CD）中的任一个的光盘驱动器设置有发射较短波长束的第一激光二极管，发射较长波长束的第二激光二极管 ，物镜，以及保持和旋转光盘的驱动单元。 物镜的光轴相对于光盘的法线倾斜。 第一激光二极管位于第一位置，使得当第一激光束会聚在第一盘的数据记录表面上时引起的彗差被最小化，并且第二激光二极管位于第二位置 当第二激光束会聚在第二盘的数据记录表面上时引起的彗差被最小化。

    Optical head and apparatus for recording and reproducing optical information through the use of the optical head
    5.
    发明授权
    Optical head and apparatus for recording and reproducing optical information through the use of the optical head 失效
    用于通过使用光学头来记录和再现光学信息的光学头和设备

    公开(公告)号：US06272097B1

    公开(公告)日：2001-08-07

    申请号：US09313211

    申请日：1999-05-18

    申请人： Takeshi Nakao ,  Shigeru Nakamura ,  Toshiaki Tanaka ,  Takeshi Shimano

    发明人： Takeshi Nakao ,  Shigeru Nakamura ,  Toshiaki Tanaka ,  Takeshi Shimano

    IPC分类号： G11B725

    CPC分类号： G11B7/1365 ,  G11B7/122 ,  G11B7/124 ,  G11B7/1372 ,  G11B7/22 ,  G11B11/1058

    摘要： A minute optical head is provided so that a light source and one or more photo detector elements are integrated on the same substrate by a simple manufacturing process and may be applied to an apparatus for recording and reproducing recordable optical information. An apparatus for recording and reproducing optical information is arranged to have a minute optical head. A light waveguide layer composed of column semiconductor crystal is formed on a monocrystalline transparent substrate and an active layer is formed on the side of the light waveguide layer. The light beam source is a semiconductor having a vertical resonator formed of a high-reflection film before and after an emitting surface of the active layer so that a light beam is vertically radiated to the substrate. The photo detector element is integrated on the closer portion of the substrate to the light beam source of the semiconductor laser. Further, on the opposed surface of the substrate to the light beam source are sequentially integrated a first transparent layer, a diffraction grating, a second transparent layer, a phase difference generating element, a third transparent layer, a light beam focusing element, a fourth transparent layer, and a slide-resisting protective layer. The slide-resisting protective layer is located closer to and as opposed to the information recording medium.

    摘要翻译： 提供一个微小的光学头，使得光源和一个或多个光电检测器元件通过简单的制造工艺集成在同一基板上，并且可以应用于用于记录和再现可记录光学信息的装置。 用于记录和再现光学信息的设备被布置成具有微小的光学头。 在单晶透明基板上形成由柱半导体晶体构成的光波导层，在光波导层一侧形成有源层。 光束源是在有源层的发射表面之前和之后具有由高反射膜形成的垂直谐振器的半导体，使得光束垂直辐射到衬底。 光检测器元件集成在基板的更靠近部分上的半导体激光器的光束源上。 此外，在与光束源的基板相对的表面上依次地集成有第一透明层，衍射光栅，第二透明层，相位差产生元件，第三透明层，光束聚焦元件，第四透明层 透明层和耐滑动保护层。 防滑保护层位于信息记录介质的更靠近和相对的位置。

    Solid-state laser device including uniaxial laser crystal emitting linearly polarized fundamental wave and nonlinear optical crystal emitting linearly polarized harmonic wave
    7.
    发明授权
    Solid-state laser device including uniaxial laser crystal emitting linearly polarized fundamental wave and nonlinear optical crystal emitting linearly polarized harmonic wave 失效
    固体激光器件包括单轴激光晶体发射线偏振基波和非线性光学晶体发射线偏振谐波

    公开(公告)号：US5377212A

    公开(公告)日：1994-12-27

    申请号：US961648

    申请日：1992-10-16

    申请人： Kimio Tatsuno ,  Tetsuo Andou ,  Tsuyoshi Miyai ,  Sten Helmfrid ,  Masahiko Takahashi ,  Koji Muraoka ,  Shigeru Nakamura

    发明人： Kimio Tatsuno ,  Tetsuo Andou ,  Tsuyoshi Miyai ,  Sten Helmfrid ,  Masahiko Takahashi ,  Koji Muraoka ,  Shigeru Nakamura

    IPC分类号： G11B7/125 ,  H01S3/00 ,  H01S3/0941 ,  H01S3/108 ,  H01S3/109

    CPC分类号： G11B7/127 ,  H01S3/109 ,  H01S3/0064 ,  H01S3/09415 ,  H01S3/108

    摘要： A short-wavelength laser having a stable output and an optical information processing system capable of high-density recording are disclosed. A solid-state laser is used as a light source, and a nonlinear optical crystal is arranged in a resonator in order to produce a short wavelength by means of a solid-state laser. The retardation of the nonlinear optical crystal is controlled by determining the length of the nonlinear optical crystal. A solid-state laser device having a stable output with the noise removed from a pumping power light source is also provided. Further, the solid-state laser device is used as a light source for the optical information processing system, and the light of irrelevant wavelengths contained in the light from the solid-state laser device are removed by a device having the ability to select wavelengths. Thus, not only a stable light source with a short wavelength but also an optical information processing system capable of high-density recording are realized.

    摘要翻译： 公开了具有稳定输出的短波长激光器和能够进行高密度记录的光学信息处理系统。 使用固态激光器作为光源，并且在谐振器中布置非线性光学晶体，以便通过固态激光器产生短波长。 通过确定非线性光学晶体的长度来控制非线性光学晶体的延迟。 还提供了具有从泵浦功率光源去除的噪声的稳定输出的固态激光器件。 此外，固体激光装置用作光学信息处理系统的光源，并且通过具有选择波长的能力的装置去除来自固体激光装置的光中包含的不相关波长的光。 因此，不仅实现了具有短波长的稳定光源，而且实现了能够进行高密度记录的光信息处理系统。

    Prism optics and optical information processing apparatus
    8.
    发明授权
    Prism optics and optical information processing apparatus 失效
    棱镜光学和光学信息处理设备

    公开(公告)号：US4770507A

    公开(公告)日：1988-09-13

    申请号：US700184

    申请日：1985-02-11

    申请人： Akira Arimoto ,  Shigeru Nakamura

    发明人： Akira Arimoto ,  Shigeru Nakamura

    IPC分类号： G02B17/04 ,  G02B27/09 ,  G11B7/135 ,  G02B13/10 ,  G02B5/04 ,  G02B26/08

    CPC分类号： G02B27/0972 ,  G02B17/04 ,  G02B27/09 ,  G02B27/0911 ,  G11B7/1356 ,  G11B7/1359 ,  G11B7/1398

    摘要： An optical system for converting the shape of a light beam by making use of refraction of prisms comprises a prism optic which includes a complex prism constituted by combination of at least two types of prisms made of materials differing from each other in respect to dispersion of refractivity. An optical information processing apparatus includes the optical system employing the prisms. Geometric optical properties of the optical system are insusceptible to being changed irrespective of changes in wavelength of the light beam brought about by dispersion in oscillation wavelength of a light source, change in the course of time lapse, change in ambient temperature and/or change in emitted light energy. With the optical system, information processing is realized which is insusceptible to the influence of the change in wavelength of the light beam.

    摘要翻译： 用于通过利用棱镜的折射来转换光束的形状的光学系统包括棱镜光学元件，其包括由至少两种类型的棱镜组成的复杂棱镜，所述至少两种类型的棱镜相对于折射率的分散而彼此不同 。 光信息处理设备包括采用棱镜的光学系统。 光学系统的几何光学性质不管是由光源的振荡波长的分散引起的光束的波长的变化而变化，而是随着时间流逝的变化，环境温度的变化和/或变化而变化 发出光能。 利用光学系统，实现了对光束波长变化的影响是不可见的信息处理。

    Prism plate for efficiently emitting light flux within a predetermined range, and liquid crystal indicator and indicator illumination method using the same
    9.
    发明授权
    Prism plate for efficiently emitting light flux within a predetermined range, and liquid crystal indicator and indicator illumination method using the same 失效
    用于有效地发射预定范围内的光通量的棱镜板，以及使用其的液晶指示器和指示器照明方法

    公开(公告)号：US5627926A

    公开(公告)日：1997-05-06

    申请号：US533547

    申请日：1995-09-25

    申请人： Shigeru Nakamura ,  Akira Arimoto ,  Kenkichi Suzuki ,  Katsuhiko Shibata

    发明人： Shigeru Nakamura ,  Akira Arimoto ,  Kenkichi Suzuki ,  Katsuhiko Shibata

    IPC分类号： G02B5/04 ,  F21V5/02 ,  F21V8/00 ,  G02B6/00 ,  G02F1/1335 ,  G02F1/13357 ,  G02B6/34 ,  F21V9/04

    CPC分类号： G02B6/0053 ,  F21V5/02 ,  G02B6/0036 ,  G02B6/0043 ,  Y10S385/901

    摘要： An information indicator suitable for information processors such as personal computers, word processors and the like includes a light source, a scattering plate which scatters light from the light source, an indicator plate irradiated with scattered light from the scattering plate, and a prism plate operatively arranged with respect to the scattering plate and the indicator plate and having a prism-like protuberance structure formed at a side thereof. The prism plate is so disposed that the prism-like protuberance structure faces the scattering plate, and the angle 2.theta. constituting the prism-like protuberance structure is defined by the formula, 2.theta..ltoreq.2/3.times.(.pi./2+2.times.arcsin (n'/n)), in this inequality, n is the refractive index of said prism plate medium, and n' is the refractive index of a material in which the prism plate is arranged.

    摘要翻译： 适合于诸如个人计算机，文字处理器等的信息处理器的信息指示器包括光源，散射来自光源的光的散射板，从散射板照射的散射光的指示板和可操作地使用的棱镜板 相对于散射板和指示板布置并且具有形成在其一侧的棱柱状突起结构。 棱镜板被设置成使得棱柱状突起结构面向散射板，并且构成棱柱状突起结构的角度2θ由公式2θ= E + 2，E 2 + 3 + EE 在该不等式中，x（pi / 2 + 2xarcsin（n'/ n）），n是所述棱镜板介质的折射率，n'是棱镜板的材料的折射率。

    Recording/reproducing optical head producing focusing error signal from zero-th order diffracted light and tracking error signal from first order diffracted light
    10.
    发明授权
    Recording/reproducing optical head producing focusing error signal from zero-th order diffracted light and tracking error signal from first order diffracted light 失效
    从零级衍射光产生聚焦误差信号的记录/再现光头和来自一级衍射光的跟踪误差信号

    公开(公告)号：US5404344A

    公开(公告)日：1995-04-04

    申请号：US154482

    申请日：1993-11-19

    申请人： Nobuo Imada ,  Kunikazu Ohnishi ,  Tohru Sasaki ,  Masayuki Inoue ,  Akira Arimoto ,  Shigeru Nakamura ,  Takeshi Nakao

    发明人： Nobuo Imada ,  Kunikazu Ohnishi ,  Tohru Sasaki ,  Masayuki Inoue ,  Akira Arimoto ,  Shigeru Nakamura ,  Takeshi Nakao

    IPC分类号： G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G11B11/10 ,  G11B11/105 ,  G11B7/00

    CPC分类号： G11B7/09 ,  G11B7/131 ,  G11B7/1353

    摘要： A recording/reproducing optical head capable of causing a light spot on a photodetector for detecting a focusing error signal to stand still without being affected by variations in wavelength of light used, capable of adjusting a tracking error signal independently of the focusing error signal, and capable of utilizing light having an order of diffraction of -1 for the purpose of detecting a signal, in which a cylindrical lens for generating astigmatism and a diffraction grating made up of two regions different in the direction of diffraction or the angle of diffraction from each other are interposed between a beam splitter and a photodetector, a light beam diffracted from the diffraction grating and including the diffracted light of the zero-th order (that is, light which has passed through the diffraction grating without being deflected) is received by the photodetector, the diffracted light of the zero-th order is used for detecting a focusing error signal according to the astigmatism method, and diffracted light having an order of diffraction of +1 and diffracted light having an order of diffraction of -1 are used for detecting a tracking error signal.

    摘要翻译： 一种记录/再现光学头，其能够使光检测器上的光点用于检测聚焦误差信号静止而不受所用光波长的变化的影响，能够独立于聚焦误差信号调整跟踪误差信号;以及 能够利用衍射次数为-1的光来检测信号，其中用于产生像散的柱面透镜和衍射光栅由衍射方向不同的两个区域或每个衍射方向衍射的角度构成 另外设置在分束器和光电检测器之间，从衍射光栅衍射的光束并且包括零级的衍射光（即，已经通过衍射光栅而不被偏转的光）被 光电检测器，零级的衍射光用于根据散光检测聚焦误差信号 sm方法，衍射次数为+1的衍射光和衍射级数为-1的衍射光用于检测跟踪误差信号。