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    • 8. 发明申请
    • OPTICAL PICKUP AND OPTICAL DISC APPARATUS
    • 光学拾取和光盘设备
    • US20070247996A1
    • 2007-10-25
    • US11695801
    • 2007-04-03
    • Satoshi KawakitaMotoo AibaKyu KannoJin SatoTakatoshi Yamada
    • Satoshi KawakitaMotoo AibaKyu KannoJin SatoTakatoshi Yamada
    • G11B7/00
    • G11B7/1275G11B7/1353G11B7/13922G11B2007/0006
    • An optical pickup includes: a light source that emits first, second and third wavelengths of optical beam; and an objective lens unit including a diffraction element whose one surface includes a first diffraction pattern where the first wavelength is diffracted while the second and third wavelengths pass through and whose other surface includes a second diffraction pattern where the second wavelength is diffracted while the first and third wavelengths pass through; and an objective lens that collects the optical beam from the diffraction element, wherein the second and third wavelengths traveling through the objective lens unit are on the optical axis of the objective lens unit while the first wavelength traveling through the objective lens unit have an angle with respect to the optical axis; and the first diffraction pattern is located at a position so as to minimize aberration of the first wavelength of optical beam.
    • 光拾取器包括:发射第一,第二和第三波长的光束的光源; 以及物镜单元,其包括衍射元件,所述衍射元件的一个表面包括第一波长衍射的第一衍射图案,而第二和第三波长通过,并且其另一个表面包括第二衍射图案,其中第二波长被衍射, 第三波长通过; 以及从衍射元件收集光束的物镜,其中通过物镜单元行进的第二和第三波长在物镜单元的光轴上,而穿过物镜单元的第一波长与 相对于光轴; 并且第一衍射图案位于使得光束的第一波长的像差最小的位置。
    • 9. 发明授权
    • Lens, light irradiation apparatus, and laser pointer
    • 透镜,光照射装置和激光指示器
    • US07192153B2
    • 2007-03-20
    • US10835669
    • 2004-04-30
    • Masayoshi AoshimaKyu Kanno
    • Masayoshi AoshimaKyu Kanno
    • F21V33/00
    • G02B27/20
    • A lens, a light irradiation apparatus and a laser pointer to which the lens is applied to are provided, in which eccentricity, discrepancy of light axes, uneven gap of lens surfaces and the like are reduced without performing positioning of respective lenses; and cost of manufacturing a lens having a plurality of functions can be reduced.A lens according to the present invention is the lens, in which a light diameter expanding element for expanding a diameter of incident light and a light collimating element for projecting approximately collimated light after receiving the incident light having the diameter thereof expanded by the light diameter expanding element are integrally formed in advance as a lens of one unit. According to such lens, it is possible to control occurrence of the eccentricity, the discrepancy of light axes and the uneven gap of lens surfaces due to a positioning discrepancy between respective lenses, in comparison to a lens wherein a lens as the light diameter expanding element and a lens as the light collimating element are individually formed and are combined into one body.
    • 提供了一种镜片,光照射装置和应用了透镜的激光指示器,其中偏心率,光轴的偏差,透镜表面的不均匀间隙等减少,而不执行各个透镜的定位; 并且可以降低制造具有多个功能的透镜的成本。 根据本发明的透镜是透镜,其中用于扩大入射光的直径的光径扩大元件和用于在接收到其直径的入射光之后投射大致准直光的光准直元件,该入射光通过光径扩大 元件作为一个单元的透镜预先一体地形成。 根据这种透镜,与其中透镜作为光径扩大元件的透镜相比,可以控制由于各透镜之间的定位差异引起的偏心率,光轴的偏差和透镜表面的不均匀间隙的发生 并且作为光准直元件的透镜分别形成并组合成一体。
    • 10. 发明授权
    • Composite magnetic head having thin conductor film
    • 具有薄导体膜的复合磁头
    • US06014291A
    • 2000-01-11
    • US263252
    • 1994-06-21
    • Makoto WatanabeSeiichi OgataYoshito IkedaKyu Kanno
    • Makoto WatanabeSeiichi OgataYoshito IkedaKyu Kanno
    • G11B5/008G11B5/09G11B5/115G11B5/127G11B5/29G11B5/48G11B5/53G11B23/00G11B5/265
    • G11B5/29G11B5/115G11B5/127G11B5/1272G11B5/4893G11B5/531G11B5/534G11B23/0007G11B5/0086G11B5/09
    • A magnetic head includes a first magnetic core half having a coil winding groove coupled to a second magnetic core half having an auxiliary core element accommodated in the coil winding groove, such that a magnetic gap is defined between joining faces of the first and second core halves. Alternatively, a composite magnetic head includes a pair of magnetic heads that have magnetic gaps with different azimuth angles from each other and disposed closely in an opposing relationship to each other in a head feeding direction so as to define respective track widths and a track pitch. A thin conductor film is formed on at least one of a pair of opposing faces of the magnetic heads for intercepting leakage fluxes from the magnetic gap of the other magnetic head. The thin conductor film has a thickness and is located such that the track pitch formed by the magnetic heads is substantially independent of the thickness of the thin conductor film. A method of producing a magnetic head includes forming a track width restricting groove on each of a pair of head core blocks. The blocks are fused together with glass when aligned with the restricting groove. An additional groove is formed at an angle substantially equal to the azimuth angle of the magnetic gap on at least one of the pairs of faces on the blocks and the blocks are cut in a direction substantially perpendicular to the bottom face of the additional groove.
    • 磁头包括第一磁芯半部,其具有耦合到具有容纳在线圈绕组槽中的辅助芯体的第二磁芯半部的线圈绕组槽,使得在第一和第二芯半部的接合面之间限定磁隙 。 或者,复合磁头包括一对磁头,它们具有彼此不同的方位角的磁隙,并且在磁头输送方向上以彼此相对的关系紧密地设置,以便限定相应的磁道宽度和磁道间距。 在磁头的一对相对面中的至少一个上形成薄导体膜,用于截取来自另一个磁头的磁隙的漏磁通。 薄导体膜具有厚度并且被定位成使得由磁头形成的轨道间距基本上与薄导体膜的厚度无关。 一种制造磁头的方法包括在一对磁头芯块的每一个上形成磁道宽度限制槽。 当与限制槽对准时,这些块与玻璃熔合在一起。 以与块上的至少一对面上的磁隙的方位角大致相等的角度形成附加的槽,并且在基本上垂直于附加槽的底面的方向上切割块。