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    Prism plate for efficiently emitting light flux within a predetermined range, and liquid crystal indicator and indicator illumination method using the same
    1.
    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。

    Prism plate for efficiently emitting light flux within a predetermined range, and liquid crystal indicator and indicator illumination method using the same
    2.
    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：US5467417A

    公开(公告)日：1995-11-14

    申请号：US117789

    申请日：1993-09-08

    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.>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。 棱镜板被设置为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> 2 / 3x（pi / 2 + 2xarcsin（n '/ n）），在该不等式中，n是所述棱镜板介质的折射率，n'是配置棱镜板的材料的折射率。

    Prism optics and optical information processing apparatus
    3.
    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。

    Optical information processing apparatus and method of controlling position of optical spot and reproducing signals
    5.
    发明授权
    Optical information processing apparatus and method of controlling position of optical spot and reproducing signals 失效
    光信息处理装置和控制光点位置和再现信号的方法

    公开(公告)号：US5490133A

    公开(公告)日：1996-02-06

    申请号：US772443

    申请日：1991-10-07

    申请人： Shigeru Nakamura ,  Mariko Umeda ,  Takeshi Nakao ,  Akira Arimoto

    发明人： Shigeru Nakamura ,  Mariko Umeda ,  Takeshi Nakao ,  Akira Arimoto

    IPC分类号： G11B7/007 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135 ,  G11B11/105 ,  G11B7/00

    CPC分类号： G11B7/1353 ,  G11B11/10543 ,  G11B11/10576 ,  G11B7/0901 ,  G11B7/0909 ,  G11B7/0917 ,  G11B7/128 ,  G11B7/1367 ,  G11B7/13922 ,  G11B2007/13727 ,  G11B7/00745 ,  G11B7/0938 ,  G11B7/0943

    摘要： An optical information processing apparatus comprising a diffraction grating for producing a zero-order beam which is a beam emitted by a light source and allowed to pass therethrough and two plus and minus first-order sub-beams respectively having positive and negative astigmatisms, radiated in directions at slight angles different from the main beam, wherein said two sub-beams are focused at opposite positions across said main beam, wherein focusing control is performed by a focusing error signal detected from a difference of signal amplitudes obtained from the respective reflected light quantities of said two sub-beams and wherein tracking control is performed by an off-track signal obtained from a signal according to a reflected light quantity of said main beam. In an apparatus for magneto-optically reproducing information, above all else, a wave plate is inserted between the focusing lens and the separating optical system, thereby increasing the reflected light quantities and stabilizing the magneto-optical signal, focusing signal and tracking signal.

    摘要翻译： 一种光学信息处理设备，包括用于产生零光束的衍射光栅，该光束是由光源发射并允许通过的光束，以及分别具有正和负散光的两个正负子像素，辐射在 方向以与主波束不同的微小角度，其中所述两个子波束聚焦在穿过所述主波束的相对位置，其中聚焦控制由通过从各反射光量获得的信号幅度差检测的聚焦误差信号来执行 的所述两个子光束，并且其中跟踪控制由根据所述主光束的反射光量从信号获得的偏离轨道信号执行。 在用于磁光再现信息的装置中，首先，在聚焦透镜和分离光学系统之间插入波片，由此增加反射光量并稳定磁光信号，聚焦信号和跟踪信号。

    Recording/reproducing optical head producing focusing error signal from zero-th order diffracted light and tracking error signal from first order diffracted light
    7.
    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。

    Optical head and information recording apparatus
    8.
    发明授权
    Optical head and information recording apparatus 失效
    光头和信息记录装置

    公开(公告)号：US5361244A

    公开(公告)日：1994-11-01

    申请号：US865114

    申请日：1992-04-08

    申请人： Shigeru Nakamura ,  Akira Arimoto ,  Takeshi Nakao ,  Mariko Umeda

    发明人： Shigeru Nakamura ,  Akira Arimoto ,  Takeshi Nakao ,  Mariko Umeda

    IPC分类号： G11B7/09 ,  G11B7/135 ,  G11B7/22 ,  H01S5/022 ,  G11B7/00

    CPC分类号： G11B7/1353 ,  G11B7/0909 ,  G11B7/22 ,  H01S5/02248 ,  H01S5/02288 ,  H01S5/02296 ,  H01S5/0683

    摘要： Disclosed herein is a compact, adjustment-free, unitary optical head wherein diffraction grating made of a birefrigence material and having convexities and concavities of grating grooves so set that the difference of their optical path lengths is some multiples and a half of the wavelength for an ordinary beam and an extraordinary beam, a diffraction grating providing astigmatisms to .+-.1 order beams, a quarter wavelength plate, and other optical components, are interposed between a semiconductor laser and a focussing lens and are stored inside an optical head body filled with a dry nitrogen gas. A focus error detection signal is obtained from the difference of the degrees of modulation of the .+-.1 order reflected beams by pre-wobbled pits, and adjustment of the optical beam can be carried out by driving the body by a two-directional head actuator.

    摘要翻译： 本文公开了一种紧凑的，无调节的单一光学头，其中衍射光栅由双折射材料制成并且具有如此设置的光栅槽的凸起和凹陷，使得它们的光程长度的差是波长的一半的一半 普通光束和非常光束，向+/- 1阶光束，四分之一波长板和其他光学部件提供散光的衍射光栅插入在半导体激光器和聚焦透镜之间，并且被存储在填充有 干燥氮气。 根据预摆动凹坑的+/- 1级反射光束的调制度的差异获得聚焦误差检测信号，光束的调节可以通过双向头部的驱动来进行 执行器。

    Optical disc drive
    10.
    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。