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    • 61. 发明授权
    • Multiple focal lens multiple focal optical pickup and optical
information reproducing apparatus
    • 多焦点透镜多焦点光学拾取器和光学信息再现装置
    • US5886970A
    • 1999-03-23
    • US791316
    • 1997-01-30
    • Akihiro TachibanaAkira MiuraToshihiko Kurihara
    • Akihiro TachibanaAkira MiuraToshihiko Kurihara
    • G02B5/32G02B5/18G11B7/00G11B7/09G11B7/125G11B7/135
    • G11B7/1353G02B5/1876G11B7/1365G11B7/13922G11B2007/0006
    • A multiple focal lens is provided with: a diffraction element having a light incident surface and a light outgoing surface for diffracting a light beam incident from the external to the light incident surface and generating a plurality of diffraction light beams from the light outgoing surface; a light condense element for condensing the generated diffraction light beams respectively onto a plurality of focal points different in position from each other; and a main body for holding said diffraction element and said light condense element. A central axis of said diffraction element and a central axis of said light condense element are offset to each other such that one optical path of one reflection light, which is used for reproducing information, among a plurality of reflection lights of the condensed diffraction light beams reflected from an information record medium on which the information to be reproduced is recorded, and the other optical paths of the other reflection lights among the plurality of reflection lights are offset to each other.
    • 多焦点透镜设置有:衍射元件,具有光入射面和光出射面,用于将从外部入射到光入射面的光束衍射,并从光出射面产生多个衍射光束; 用于将所生成的衍射光束分别聚光到彼此不同位置的多个焦点上的轻的冷凝元件; 以及用于保持所述衍射元件和所述光缩合元件的主体。 所述衍射元件的中心轴线和所述光冷凝元件的中心轴彼此偏移,使得在聚光衍射光束的多个反射光中用于再现信息的一个反射光的一个光路 从记录有要再现的信息的信息记录介质反射,并且多个反射光中的其他反射光的其他光路彼此偏移。
    • 62. 发明授权
    • Optical pickup apparatus for optical record media and identification
apparatus for identifying the type of optical record media
    • 用于光学记录介质的光学拾取装置和用于识别光学记录介质的类型的识别装置
    • US5757742A
    • 1998-05-26
    • US595196
    • 1996-02-01
    • Taichi AkibaAkira Miura
    • Taichi AkibaAkira Miura
    • G11B7/00G11B7/0037G11B7/125G11B7/135G11B19/12G11B7/095
    • G11B7/1376G11B19/12G11B19/128G11B7/127G11B7/1275G11B7/1353G11B7/1365G11B7/1369G11B7/1378G11B7/1381G11B7/139G11B7/13925G11B7/1398G11B2007/0006G11B2007/13727
    • An optical pickup apparatus for an information reproducing apparatus is adapted to reproduce one of at least first and second type optical record media which is loaded on the information reproducing apparatus. The first and second type optical record media have distances from surfaces to information record planes different from each other. The optical pickup apparatus is provided with: a light emission device for emitting a reading light; an objective lens for focusing the emitted reading light onto the information record plane of the loaded one of the first and second type optical record media such that a focus condition of the focused reading light is optimum with respect to the first type optical record medium; a correction device for correcting a spherical aberration of the focused reading light with respect to the second type optical record medium due to a difference in the distances from the surfaces to the information record planes between the first and second type optical record media when the second type optical record medium is loaded; and a light receiving device for receiving a reflection light of the focused reading light from the information record plane of the loaded one of the first and second optical record media.
    • 用于信息再现装置的光学拾取装置适于再现加载在信息再现装置上的至少第一和第二类型的光学记录介质之一。 第一和第二类光学记录介质具有彼此不同的表面到信息记录平面的距离。 光拾取装置具有:用于发出读取光的发光装置; 用于将发射的读取光聚焦到第一和第二类型光学记录介质中加载的一个光学记录介质的信息记录平面上的物镜,使得聚焦读取光的聚焦条件相对于第一类型的光学记录介质是最佳的; 校正装置,用于当第二类型的光学记录介质的第二和第二类光学记录介质之间的距离与第一和第二类型光学记录介质之间的信息记录平面之间的距离不同时,校正聚焦的读取光的相对于第二类型光学记录介质的球面像差 装载光记录介质; 以及光接收装置,用于从所装载的第一和第二光学记录介质的信息记录平面接收聚焦的读取光的反射光。
    • 64. 发明授权
    • Reflector for vehicle headlight
    • 汽车前灯反射器
    • US5192124A
    • 1993-03-09
    • US783992
    • 1991-10-29
    • Hiroshi KawashimaTakao WatanabeAkira Miura
    • Hiroshi KawashimaTakao WatanabeAkira Miura
    • F21S8/10F21V7/00
    • F21S48/1317F21S48/1335
    • An elliptical paraboloid, which is a basic surface, has an elliptical section when it is cut by a plane perpendicular to its optical axis, and has a parabolic section when it is cut by a plane including its optical axis. A light source is arranged on the optical axis. A cross sectional curve obtained when a reflecting surface is cut by a plane perpendicular to its optical axis is expressed by a finite-order vector algebraic expression by specifying its end point positions and coefficient vectors. As a result, the reflecting surface is formed as a free surface deviating from the basic surface. Operations for controlling the surface, which are important in forming a cutline, are an operation of making the tangential vector at the end point of the cross sectional curve orthogonal to the position vector, and an operation of twisting the surface. By these operations the light-distribution control is performed so that longitudinally extending peripheries of respective filament images can be flush with one another. Finally, a sharp cutline is formed which is specific to a low beam.
    • 作为基本表面的椭圆抛物面当其被垂直于其光轴的平面切割时具有椭圆形截面,并且当其被包括其光轴的平面切割时具有抛物面截面。 光源设置在光轴上。 当通过垂直于其光轴的平面切割反射表面时获得的横截面曲线由有限次向量代数表达式通过指定其端点位置和系数向量来表示。 结果,反射面形成为偏离基面的自由面。 在形成切割线时重要的用于控制表面的操作是使截面曲线的端点处的切向矢量与位置矢量正交的操作,以及扭曲表面的操作。 通过这些操作,执行光分布控制,使得各个细丝图像的纵向延伸的周边可以彼此齐平。 最后,形成一个特定于远光束的尖锐的切割线。