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    • 1. 发明授权
    • Optical head
    • 光头
    • US08243575B2
    • 2012-08-14
    • US12955119
    • 2010-11-29
    • Tomoto KawamuraHiromi KitaHiroshi OgasawaraMichio Hatagi
    • Tomoto KawamuraHiromi KitaHiroshi OgasawaraMichio Hatagi
    • G11B7/00
    • G11B7/1275G11B7/08582G11B7/1359G11B2007/0006
    • A thin-type optical head, smaller in optic mounting spaces comprising to the conventional one, in an optic system enabling with BD including a 2-layers BD, DVD an CD, comprises a light source, for emit a light beam therefrom; an optical branch element for penetrating a predetermined amount of lights, therethrough, of an incident light beam thereon, and to reflecting remaining amount of lights thereupon; a light focusing element for focusing the light beam upon an optical information recording medium; a photo detector for receiving the light beam reflecting upon the optical information recording medium; and an optical path converter element for converting an angle of an optical path, on which the light beam propagates, wherein the optical path converter element is disposed on an optical path of the light beam between the optical branch element and the photo detector, or between the optical branch element and the light source, and has an incident surface, upon which the light beam enters, and an emission surface, from which the light beams emits, so that the light beam reflects at least two (2) times within the optical path converter element, during time when passing through between the incident surface and the emission surface.
    • 一种薄型光学头,在包括常规光学系统的光学安装空间中较小,在具有包括2层BD,DVD和CD的BD的光学系统中,包括用于从其发射光束的光源; 用于穿过其中的入射光束穿过其中的预定量的光并且反射剩余的光量的光学分支元件; 用于将光束聚焦在光学信息记录介质上的光聚焦元件; 光检测器,用于接收在光信息记录介质上反射的光束; 以及用于转换光束传播的光路的角度的光路转换器元件,其中光路转换器元件设置在光分支元件和光检测器之间的光束的光路上,或者在 光分支元件和光源,并且具有光束入射的入射表面和光束从其发射的发射表面,使得光束在光学器件内反射至少两(2)次 路径转换器元件,在通过入射表面和发射表面之间的时间期间。
    • 4. 发明申请
    • Optical Pickup
    • 光学拾音
    • US20130176840A1
    • 2013-07-11
    • US13779802
    • 2013-02-28
    • Hiromi KitaTomoto KawamuraToshiteru Nakamura
    • Hiromi KitaTomoto KawamuraToshiteru Nakamura
    • G11B21/10
    • G11B21/106G11B7/0906G11B7/0916G11B7/131G11B7/1353G11B2007/0013
    • An optical pickup includes a light source, an objective lens, a diffraction grating that divides an optical beam reflected from a predetermined information layer, into a plurality of optical beams, and a detector having a plurality of photo-receivers to receive a plurality of optical beams. The diffraction grating has a predetermined region for dividing from a signal light beam a region including a central portion of a spot which the signal light beam will form on the diffraction grating. A distance from a central section of the detector to that of a spot center photo-receiver on the detector, the spot center photo-receiver being provided to receive the optical beams formed by division in a predetermined region of the diffraction grating, is equal to or greater than a spot radius of the unwanted light beams entering the predetermined region of the diffraction grating, on the detector.
    • 光拾取器包括光源,物镜,将从预定信息层反射的光束划分成多个光束的衍射光栅,以及具有多个光接收器的检测器,以接收多个光学 梁。 衍射光栅具有用于从信号光束分离包括信号光束将在衍射光栅上形成的点的中心部分的区域的预定区域。 从检测器的中心部分到检测器上的光点中心光电接收器的距离,被设置成接收由衍射光栅的预定区域划分的光束的光点中心光电接收器等于 或大于在检测器上进入衍射光栅的预定区域的不想要的光束的光点半径。
    • 5. 发明授权
    • Optical pickup
    • 光学拾音
    • US08427911B2
    • 2013-04-23
    • US12956155
    • 2010-11-30
    • Hiromi KitaTomoto KawamuraToshiteru Nakamura
    • Hiromi KitaTomoto KawamuraToshiteru Nakamura
    • G11B7/00G11B5/58G11B20/18G11B7/135
    • G11B21/106G11B7/0906G11B7/0916G11B7/131G11B7/1353G11B2007/0013
    • An optical pickup includes a light source, an objective lens, a diffraction grating that divides an optical beam reflected from a predetermined information layer, into a plurality of optical beams, and a detector having a plurality of photo-receivers to receive a plurality of optical beams. The diffraction grating has a predetermined region for dividing from a signal light beam a region including a central portion of a spot which the signal light beam will form on the diffraction grating. A distance from a central section of the detector to that of a spot center photo-receiver on the detector, the spot center photo-receiver being provided to receive the optical beams formed by division in a predetermined region of the diffraction grating, is equal to or greater than a spot radius of the unwanted light beams entering the predetermined region of the diffraction grating, on the detector.
    • 光拾取器包括光源,物镜,将从预定信息层反射的光束划分成多个光束的衍射光栅,以及具有多个光接收器的检测器,以接收多个光学 梁。 衍射光栅具有用于从信号光束分离包括信号光束将在衍射光栅上形成的点的中心部分的区域的预定区域。 从检测器的中心部分到检测器上的光点中心光电接收器的距离,被设置成接收由衍射光栅的预定区域划分的光束的光点中心光电接收器等于 或大于在检测器上进入衍射光栅的预定区域的不想要的光束的光点半径。