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    • 3. 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。
    • 7. 再颁专利
    • Optical pickup head and information recording/reproducing device
    • 光拾取头和信息记录/再现装置
    • USRE43126E1
    • 2012-01-24
    • US11529689
    • 2006-09-28
    • Hideki HayashiSadao MizunoDaisuke OgataShin-ichi KadowakiKousei SanoJouji AnzaiAkihiro Yasuda
    • Hideki HayashiSadao MizunoDaisuke OgataShin-ichi KadowakiKousei SanoJouji AnzaiAkihiro Yasuda
    • G11G7/00
    • G11B7/131G11B7/0903G11B7/1353G11B7/13927G11B2007/0013
    • An optical pickup head is provided with a light source, a diffracting means for creating a plurality of diffracted beams, a converging means for focusing the diffracted beams onto an optical storage medium, a beam branching means for branching the plurality of beams reflected by the optical storage medium, and an optical detecting means for outputting a signal corresponding to the amount of light of the received beams. The optical detecting means has main beam light receiving portions and sub-beam light receiving portions. The amount of light of the first or higher order diffracted beams when they are substantially focused on and reflected by a focus plane of the plurality of information recording planes is equal to or greater than the amount of light of the zero order diffracted beam when it is reflected without focusing by a non-focus plane other then the focus plane of the plurality of information recording planes. The invention provides an optical pickup head where offset is not generated in the TE signals even during tracking with the objective lens when a two-layered disk is used.
    • 光拾取头设置有光源,用于产生多个衍射光束的衍射装置,用于将衍射光束聚焦到光存储介质上的会聚装置,用于将由光学器件反射的多个光束分支的光束分支装置 存储介质,以及光检测装置,用于输出对应于接收光束的光量的信号。 光检测装置具有主光束光接收部分和副光束光接收部分。 当它们基本上聚焦在多个信息记录面的聚焦平面上并被其反射时,第一或更高阶衍射光束的光量等于或大于零级衍射光束的光量 反射而不聚焦在多个信息记录平面的焦点平面之外的非聚焦平面。 本发明提供了一种光拾取头,即使在使用双层盘的情况下在物镜进行跟踪期间,也不会在TE信号中产生偏移。
    • 8. 发明申请
    • OBJECTIVE LENS, OPTICAL HEAD AND OPTICAL DISC DEVICE
    • 目标镜头,光头和光盘设备
    • US20100220578A1
    • 2010-09-02
    • US12159425
    • 2006-12-27
    • Fumitomo YamasakiKatsuhiko HayashiSadao MizunoHideki Aikoh
    • Fumitomo YamasakiKatsuhiko HayashiSadao MizunoHideki Aikoh
    • G11B7/135G02B11/02G02B13/18
    • G02B9/10G02B3/08G02B13/18G11B7/1275G11B7/1374G11B7/13922G11B2007/0006
    • Provides an objective lens, an optical head and an optical disc apparatus (drive) capable of compensating for various types of aberrations including wavelength changes for a plurality of types of optical discs including high density optical discs, DVDs and CDs with a good wavelength dispersion compensation ability and thus capable of providing good recording or reproduction characteristics.The objective lens according to the present invention includes a first lens and a second lens substantially in close contact with each other such that optical axes thereof match each other, and acts as a convex lens as a whole. Each lens includes a central portion including the optical axis and a peripheral portion located in a periphery of the central portion. The central portion of the first lens acts as a convex lens; and the central portion of the second lens acts as a concave lens. Where the refractive index of the first lens at d line (wavelength: 587.56 nm) is nd1, the Abbe constant of the first lens represented using the refractive indices at d line, F line (wavelength: 486.13 nm) and C line (wavelength: 656.27 nm) is νd1, the refractive index of the second lens at d line is nd2, and the Abbe constant of the second lens represented using the refractive indices at d line, F line and C line is νd2, the objective lens fulfills nd1>nd2 and νd1>νd2.
    • 提供能够补偿包括具有良好的波长色散补偿的高密度光盘,DVD和CD的多种类型的光盘的波长变化的各种像差的物镜,光头和光盘装置(驱动器) 因此能够提供良好的记录或再现特性。 根据本发明的物镜包括基本上彼此紧密接触的第一透镜和第二透镜,使得其光轴彼此匹配,并且作为整体起凸透镜的作用。 每个透镜包括包括光轴的中心部分和位于中心部分的周边的周边部分。 第一透镜的中心部分用作凸透镜; 并且第二透镜的中心部分用作凹透镜。 在d线(波长:587.56nm)处的第一透镜的折射率为nd1的情况下,使用在d线,F线(波长:486.13nm)和C线(波长:48nm)处的折射率表示的第一透镜的阿贝常数 656.27nm)是d1,d线的第二透镜的折射率为nd2,使用d线,F线和C线的折射率表示的第二透镜的阿贝常数为d2,目标 镜头满足nd1> nd2和&ngr; d1>&ngr; d2。
    • 10. 发明授权
    • Optical head and optical information apparatus for recording or reproducing information on an information recording medium
    • 用于在信息记录介质上记录或再现信息的光头和光信息装置
    • US07486606B2
    • 2009-02-03
    • US11151272
    • 2005-06-14
    • Kousei SanoYoshiaki KommaSadao Mizuno
    • Kousei SanoYoshiaki KommaSadao Mizuno
    • G11B7/00
    • G11B7/1353
    • An optical head 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, 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位于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包括:发射光束的半导体激光器 的光 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。