Optical disc information device and information processing device
    1.
    发明授权
    Optical disc information device and information processing device 有权
    光盘信息设备和信息处理设备

    公开(公告)号:US09484054B2

    公开(公告)日:2016-11-01

    申请号:US14848882

    申请日:2015-09-09

    Abstract: An optical disc information device is an optical disc information device for reproducing and/or recording information with respect to an optical disc including a track in the form of a groove, and capable of recording information in a land portion and in a groove portion of the groove. The optical disc information device includes a laser light source, an objective lens, a transmittance limiting element, a dividing element, a light detector, a central amplifier, at least two end amplifiers, a gain controller, an adder, a reproduction signal processor, and a control signal processor. The transmittance limiting element includes a first central region, and at least two first end regions which interpose the first central region therebetween, and attenuates light passing through at least the first end regions out of a light flux emitted from the laser light source more strongly than light passing through the first central region.

    Abstract translation: 光盘信息设备是用于再现和/或记录关于包括凹槽形式的轨道的光盘的信息的光盘信息设备,并且能够将信息记录在接地部分和凹槽部分的槽部分中 槽。 光盘信息装置包括激光源,物镜,透光率限制元件,分割元件,光检测器,中央放大器,至少两个末端放大器,增益控制器,加法器,再现信号处理器, 和控制信号处理器。 透光率限制元件包括第一中心区域和至少两个第一端部区域,其中插入第一中心区域,并且使从激光光源发射的光束中至少穿过至少第一端部区域的光更强烈地比通过 光穿过第一个中心区域。

    Optical information apparatus and information processing apparatus
    4.
    发明授权
    Optical information apparatus and information processing apparatus 有权
    光信息装置和信息处理装置

    公开(公告)号:US09418695B2

    公开(公告)日:2016-08-16

    申请号:US14971326

    申请日:2015-12-16

    Abstract: An RF hologram is divided in a direction perpendicular to a tangent line of an information track of an information recording surface of an optical disc, and includes a central region including an optical axis of laser light as well as a first end portion region and a second end portion region which sandwich the central region, the central region is formed by a binary diffraction grating and generates ±1 order diffracted light, the first end portion region is formed by a blazed diffraction grating and generates first +1 order diffracted light, the second end portion region is formed by a blazed diffraction grating and generates second +1 order diffracted light, and an RF light receiving element receives both the ±1 order diffracted light, the first +1 order diffracted light, and the second +1 order diffracted light.

    Abstract translation: RF全息图在与光盘的信息记录表面的信息轨道的切线垂直的方向上分割,并且包括包括激光的光轴的中心区域以及第一端部区域,以及第二 夹着中心区域的端部区域,中央区域由二元衍射光栅形成,产生±1级衍射光,第一端部区域由闪耀的衍射光栅形成,产生第一+1级衍射光,第二 端部区域由闪耀的衍射光栅形成,并产生第二+1级衍射光,RF光接收元件接收±1级衍射光,第一+1级衍射光和第二+1级衍射光 。

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