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    • 62. 发明申请
    • Optical head, optical information apparatus, and optical-information reproducing method
    • 光头,光信息装置和光信息再现方法
    • US20050276202A1
    • 2005-12-15
    • US11151272
    • 2005-06-14
    • Kousei SanoYoshiaki KommaSadao Mizuno
    • Kousei SanoYoshiaki KommaSadao Mizuno
    • G11B7/13G11B7/135G11B7/00
    • G11B7/1353
    • An optical head is provided which is capable of realizing a stable tracking control, even if the rotational center of an information recording medium is not located on the extension line of the transfer directions of a light-concentrating element. This optical head includes: a semiconductor laser which emits a beam of light; an objective lens which concentrates the beam of light on an optical disk; a transfer mechanism which transfers the objective lens between the outermost circumference and the innermost circumference of the recording area of the optical disk along the optical disk; and a photo-detector which detects a beam of light that returns from the optical disk. The photo-detector includes a plurality of areas which are divided by a division line. The division line is set parallel to the tangential directions of the track in a predetermined position on the transfer line of the objective lens between the outermost circumference and the innermost circumference of the recording area, and the plurality of areas are divided, by a lateral division line which intersects the division line, into a first area on which a beam of light that mainly includes a tracking component is incident and a second area on which a beam of light that does not include the tracking component is incident.
    • 即使信息记录介质的旋转中心不在聚光元件的传送方向的延长线上,也能够实现稳定的跟踪控制的光学头。 该光头包括:发射光束的半导体激光器; 将光束聚集在光盘上的物镜; 传送机构,其沿着光盘在光盘的记录区域的最外圆周和最内圆周之间传送物镜; 以及光检测器,其检测从光盘返回的光束。 光检测器包括由划分线划分的多个区域。 分割线与记录区域的最外圆周和最内圆周之间的物镜的传送线上的预定位置处的轨道的切线方向平行设置,并且通过横向划分来划分多个区域 与分割线相交的第一区域进入主要包括跟踪分量的光束入射的第一区域和不包括跟踪组件的光束入射的第二区域。
    • 64. 发明授权
    • Method of lapping a bevel gear
    • 研磨锥齿轮的方法
    • US5775975A
    • 1998-07-07
    • US741912
    • 1996-10-31
    • Sadao MizunoAkinori HoshinoTetsuya Morita
    • Sadao MizunoAkinori HoshinoTetsuya Morita
    • B23F19/02B24D7/18B24B1/00
    • B23F19/025Y10S451/90
    • This invention aims to provide a method of lapping a bevel gear effectively by placing a gear-shaped tool whose axis has the same relation with the axis of the bevel gear as those of hypoid gears. In a double mode, gear-shaped tools are placed whose axes lie in a position offset with respect to the axes of the first gear and the second gear and have the same relation as those of hypoid gears. The first gear is engaged with one gear-shaped tool and the second gear is engaged with the other gear-shaped tool, while lapping liquid is supplied to engaging portions, thereby lapping engaging surfaces of toothed portions of the first gear and the second gear.
    • 本发明的目的在于提供一种通过放置齿轮形工具来研磨锥齿轮的方法,所述齿轮工具的轴与伞形齿轮的轴线具有与准双曲面齿轮的轴线相同的关系。 在双重模式下,放置齿轮形工具,其轴线位于相对于第一齿轮和第二齿轮的轴线偏移的位置,并且具有与准双曲面齿轮相同的关系。 第一齿轮与一个齿轮形工具接合,并且第二齿轮与另一个齿轮形工具接合,同时研磨液体被供应到接合部分,从而研磨第一齿轮和第二齿轮的齿形部分的接合表面。
    • 69. 发明授权
    • Optical head system and its optical disc
    • 光头系统及其光盘
    • US5418774A
    • 1995-05-23
    • US117554
    • 1993-09-07
    • Shunji O'HaraTakashi IshidaSadao MizunoNoboru Ito
    • Shunji O'HaraTakashi IshidaSadao MizunoNoboru Ito
    • G11B7/007G11B7/12G11B7/013
    • G11B7/00745G11B7/12
    • An optical head system designed to accomplish an information recording and/or reproduction from opposite disc surfaces of an optical disc with the use of a single light source. The optical head system comprises a source of light for providing a linearly polarized beam of light; a collimator lens for collimating the linearly polarized beam of light into a collimated beam of light; a polarizing direction rotating unit for arbitrarily varying a direction of linear polarization of said beam of light; a polarizing beam splitter for dividing the beam, whose direction of linear polarization has been varied, into first and second beam components; and objective lenses for focusing the first and second beam components into respective penciles of light which are projected onto first and second, opposite disc surfaces of an optical disc or one disc surfaces of respective first and second optical discs.
    • 一种光学头系统,其设计用于使用单个光源来实现从光盘的相对盘表面的信息记录和/或再现。 光头系统包括用于提供线偏振光束的光源; 准直透镜,用于将线性偏振光束准直成准直光束; 用于任意改变所述光束的线偏振方向的偏振方向旋转单元; 用于将线性极化方向已经变化的光束分成第一和第二光束分量的偏振分束器; 以及用于将第一和第二光束分量聚焦到相应的光线中的物镜,其投射到光盘的第一和第二相对的盘表面或相应的第一和第二光盘的一个盘表面上。