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    • 1. 发明授权
    • Multilayer recording medium and method of manufacturing the same
    • 多层记录介质及其制造方法
    • US07567493B2
    • 2009-07-28
    • US11290593
    • 2005-12-01
    • Tao HongChong-sam ChungTae-kyung KimWoo-seok Choi
    • Tao HongChong-sam ChungTae-kyung KimWoo-seok Choi
    • G11B7/20G11B7/26
    • G11B7/26G11B7/24038G11B7/268
    • A multilayer recording medium that prevents deterioration of a signal characteristic due to a mirror effect that may occur between recording layers and a method of manufacturing the same, the multilayer recording medium having at least two recording layers, wherein a thickness of at least one spacer layer between adjacent recording layers is different from a thickness of the other spacer layers such that a beam focusing on a recording layer is prevented from focusing on another recording layer corresponding to a mirror layer due to reflection. In the multilayer recording medium, a mirror effect is greatly reduced. In addition, the thickness of only a spacer layer exerting the most significant influence on the mirror effect is changed to prevent the deterioration of signal quality due to the mirror effect, and therefore, the structure of a multilayer recording medium is simplified.
    • 一种防止由于记录层之间可能发生的镜面效应引起的信号特性劣化的多层记录介质及其制造方法,所述多层记录介质具有至少两个记录层,其中至少一个间隔层的厚度 相邻记录层之间的距离不同于其它间隔层的厚度,从而防止聚焦在记录层上的光束聚焦于由于反射而对应于镜层的另一个记录层。 在多层记录介质中,镜面效果大大降低。 此外,仅改变对镜效应产生最重要影响的间隔层的厚度,以防止由于镜面效应引起的信号质量的劣化,因此简化了多层记录介质的结构。
    • 2. 发明授权
    • Multilayer recording medium and optical pickup for recording and/or reproducing the same
    • 用于记录和/或再现的多层记录介质和光学拾取器
    • US07298675B2
    • 2007-11-20
    • US11227912
    • 2005-09-16
    • Tao HongTae-kyung KimChong-sam Chung
    • Tao HongTae-kyung KimChong-sam Chung
    • G11B7/00
    • G11B7/0903G11B7/131G11B2007/0013
    • An optical pickup for recording and/or reproducing data with respect to a multilayer recording medium having a plurality of recording layers, where the optical pickup includes a light source emitting a beam having a predetermined wavelength, a diffraction unit separating the beam emitted from the light source into a main beam and a sub-beam, and a photodetector having a main photodetector detecting a main beam reflected from the multilayer recording medium and a sub-photodetector detecting the sub-beam. In the optical pickup, the main photodetector and sub-photodetector are separated a predetermined distance from each other so that a beam spot formed by the beam reflected from a defocus recording layer is not detected by the sub-photodetector.
    • 一种用于相对于具有多个记录层的多层记录介质记录和/或再现数据的光学拾取器,其中光学拾取器包括发射具有预定波长的光束的光源,将从光发射的光束分离的衍射单元 源到主光束和子光束,以及光检测器,其具有检测从多层记录介质反射的主光束的主光电检测器和检测子光束的子光电检测器。 在光学拾取器中,主光电检测器和副光电检测器彼此隔开预定距离,使得由离焦记录层反射的光束形成的光束点不被副光电检测器检测。
    • 3. 发明申请
    • Optical pickup apparatus capable of detecting and compensating for spherical aberration caused by thickness variation of recording layer
    • 能够检测和补偿由记录层的厚度变化引起的球面像差的光学拾取装置
    • US20070041287A1
    • 2007-02-22
    • US11496522
    • 2006-08-01
    • Tao HongTae-kyung KimWoo-seok ChoiChong-sam Chung
    • Tao HongTae-kyung KimWoo-seok ChoiChong-sam Chung
    • G11B7/00
    • G11B7/1353G11B7/0943G11B7/131G11B7/13927
    • An optical pickup apparatus, including a light source to emit light, an objective lens to form a light spot on an optical recording medium by focusing the light emitted from the light source, an optical division unit, disposed between the light source and the objective lens, to divide the light emitted from the light source into a main beam and two subbeams to form one main spot and two subspots on the optical recording medium, the optical division unit having a first area and a second area surrounding the first area, a detector to detect the amount of light of the main beam and the amount of light of the respective subbeams reflected from the optical recording medium, a beam splitter disposed between the light source and the objective lens to allow the light reflected from the optical recording medium to be directed to the detector, signal generating circuits to generate a tracking error signal (TES), a focusing error signal (FES), and a spherical aberration signal (SAS), respectively, in response to the output of the detector, and a spherical aberration compensation unit, disposed between the objective lens and the beam splitter, to compensate for spherical aberration using the SAS generated by the signal generating circuits.
    • 一种光拾取装置,包括用于发光的光源,通过聚焦从光源发射的光在光学记录介质上形成光斑的物镜,设置在光源和物镜之间的光学分割单元 为了将从光源发射的光分成主光束和两个子光束,以在光记录介质上形成一个主光点和两个子光点,光分割单元具有第一区域和围绕第一区域的第二区域,检测器 检测主光束的光量和从光记录介质反射的各子束的光量,设置在光源和物镜之间的分束器,以允许从光记录介质反射的光为 指向检测器,信号发生电路分别产生跟踪误差信号(TES),聚焦误差信号(FES)和球面像差信号(SAS) ,并且配置在物镜和分束器之间的球面像差补偿单元,以使用由信号发生电路产生的SAS补偿球面像差。
    • 8. 发明授权
    • Centrifugal fan assembly
    • 离心风机总成
    • US09140270B2
    • 2015-09-22
    • US13231993
    • 2011-09-14
    • Tao Hong
    • Tao Hong
    • F04D29/28F04D17/02F04D29/42
    • F04D29/282F04D17/025F04D29/4226
    • The present invention relates to a centrifugal fan assembly and a HVAC-system, comprising a housing, a blower wheel comprising a plurality of fan blades, the blower wheel being rotatably mounted in the housing and constructed to generate an airflow flowing axially into the blower wheel and radially out from the blower wheel, a guiding vane device including a plurality of guiding vanes, the guiding vane device being coupled to the blower wheel and configured to guide the airflow into the blower wheel.
    • 本发明涉及离心风扇组件和HVAC系统,其包括壳体,包括多个风扇叶片的鼓风机叶轮,鼓风机叶轮可旋转地安装在壳体中并构造成产生轴向流入鼓风机叶轮的气流 并且从所述鼓风机轮径向地排出导叶装置,所述引导叶片装置包括多个导向叶片,所述导叶装置联接到所述鼓风机叶轮并且构造成将所述气流引导到所述鼓风机叶轮中。