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    • 41. 发明授权
    • Optical disc drive which uses a train of pulses to shift the focus of a focusing section
    • 使用一串脉冲来移动聚焦部分的焦点的光盘驱动器
    • US07440362B2
    • 2008-10-21
    • US10722875
    • 2003-11-26
    • Katsuya WatanabeShin-ichi YamadaKenji FujiuneYuuichi Kuze
    • Katsuya WatanabeShin-ichi YamadaKenji FujiuneYuuichi Kuze
    • G11B7/00
    • G11B7/08511G11B7/08529G11B2007/0013
    • An optical disc drive includes: a light source; a focusing section; a focus shifting section for shifting the focal point of light by changing the position of the focusing section perpendicularly to a data storage layer of a given optical disc in accordance with a control signal; a light receiving section for receiving, at multiple areas, the light reflected from the data storage layer and generating light quantity signals; a signal generating section for generating a focus error signal based on the light quantity signals; and a control section for generating the control signal responsive to the focus error signal such that the focal point is transferred to a focus controllable range. The control section generates the control signal such that the focal point is decelerated at a first acceleration and then at a second acceleration. The absolute value of the second acceleration is smaller than that of the first acceleration.
    • 光盘驱动器包括:光源; 聚焦部分; 聚焦移动部分,用于通过根据控制信号改变聚焦部分的位置垂直于给定光盘的数据存储层来移动光焦点; 光接收部分,用于在多个区域接收从数据存储层反射的光并产生光量信号; 信号产生部分,用于基于光量信号产生聚焦误差信号; 以及控制部分,用于响应于聚焦误差信号产生控制信号,使得焦点被转移到聚焦可控范围。 控制部生成控制信号,使得焦点以第一加速度然后以第二加速度减速。 第二加速度的绝对值小于第一加速度的绝对值。
    • 43. 发明申请
    • Optical disc controller
    • 光盘控制器
    • US20060209646A1
    • 2006-09-21
    • US10553616
    • 2004-04-16
    • Akira YoshikawaShin-ichi Yamada
    • Akira YoshikawaShin-ichi Yamada
    • G11B7/00
    • G11B7/08511G11B2007/0013
    • The present invention provides an optical disk control device that can perform focus pulling in a short time for a target information surface of an optical disk having a plurality of information surfaces. An objective lens (23) is moved toward an optical disk (1) having a plurality of information surfaces (1A, 1B) by the output signal of a driving signal generating circuit (42B), passage of an initial focused focal position is detected by a focal point passage detecting circuit (44), and when the objective lens moves past that position only a predetermined amount closer to the optical disk, an n-rotation delay circuit (70) outputs a reversal instruction f. After changing directions and moving the objective lens away from the optical disk, a focus pulling-in circuit (32B) switches a signal “a” that is output to an actuator driving circuit (21) from the output signal of the driving signal generating circuit to the output signal of the control circuit, activates a control circuit and performs focus pulling-in.
    • 本发明提供一种光盘控制装置,其可以在具有多个信息表面的光盘的目标信息表面上在短时间内执行聚焦拉动。 物镜(23)通过驱动信号发生电路(42B)的输出信号向具有多个信息表面(1A,1B)的光盘(1)移动,初始聚焦焦点位置 通过焦点通过检测电路(44)检测到,并且当物镜仅靠近光盘的预定量移动超过该位置时,n旋转延迟电路(70)输出反转指令f。 在改变方向并将物镜移动离开光盘之后,聚焦拉入电路(32B)从产生驱动信号的输出信号切换输出到致动器驱动电路(21)的信号“a” 电路连接到控制电路的输出信号,激活控制电路并进行聚焦拉入。
    • 44. 发明授权
    • Optical disk and optical disk apparatus with tracks and grooves
    • 具有轨道和凹槽的光盘和光盘设备
    • US06567372B2
    • 2003-05-20
    • US09435126
    • 1999-07-14
    • Kouichi TakamineShin-ichi YamadaTakashi IshidaAtsushi NakamuraSeiji Nishiwaki
    • Kouichi TakamineShin-ichi YamadaTakashi IshidaAtsushi NakamuraSeiji Nishiwaki
    • G11B724
    • G11B27/19G11B7/007G11B7/00718G11B7/00745G11B7/0901G11B7/0938G11B7/24085G11B27/3027
    • An optical disk includes tracks and grooves, the grooves being formed with a pitch equal to or greater than about &lgr;/NA. A first array of pits is provided at a position which is shifted by a predetermined amount with respect to each track in one of two directions substantially perpendicular to the tracks, the first array of pits being formed with a predetermined pitch, where the predetermined pitch is a function of a pitch of the grooves taking a value within a range from about 0 to about &lgr;/NA. A second array of pits is provided at a position which is shifted by a predetermined amount with respect to the track in the other one of the two directions substantially perpendicular to the tracks, the second array of pits being formed with a predetermined pitch, where the predetermined pitch is a function of the pitch of the grooves taking a value within the range from about 0 to about &lgr;/NA. &lgr; is a wavelength of a light beam which is radiated on the optical disk, and NA to a numerical aperture of a lens.
    • 光盘包括轨迹和凹槽,凹槽以等于或大于约lambd / NA的间距形成。 第一凹坑阵列设置在相对于每个轨道在基本上垂直于轨道的两个方向中的一个方向上偏移预定量的位置处,第一凹坑阵列以预定间距形成,其中预定间距为 其凹槽的间距的函数为从大约0到大约lambd / NA的范围。 第二凹坑阵列设置在相对于基本上垂直于轨道的两个方向中的另一个方向上的轨道相对于轨道偏移预定量的位置,第二凹坑阵列以预定间距形成,其中 预定间距是凹槽的间距的函数,其值在大约0至大约lambd / NA的范围内。 羔羊是辐射在光盘上的光束的波长,NA到透镜的数值孔径。