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    • 71. 发明申请
    • INFORMATION RECORDING MEDIUM, AND METHOD AND APPARATUS FOR RECORDING A SIGNAL THEREON
    • 信息记录介质,以及记录信号的方法和装置
    • US20120057442A1
    • 2012-03-08
    • US13294611
    • 2011-11-11
    • Yasuhiro Ueki
    • Yasuhiro Ueki
    • G11B7/126G11B7/085G11B7/24
    • G11B7/1267G11B7/00736G11B2007/0013
    • A disc-shaped information recording medium includes a laminate of recording layers on and from which an information signal can be optically recorded and reproduced from one side of the medium. Data areas are provided in the recording layers, respectively. The information signal can be recorded on and reproduced from the data areas while a laser beam emitted from an optical pickup is applied to the data areas. Optical recording test areas are provided in the recording layers, respectively. A test signal can be recorded on and reproduced from the optical recording test areas to decide optimum power values of the laser beam for signal recording. The test areas are out of overlap as viewed in a direction of propagation of the laser beam.
    • 盘形信息记录介质包括记录层的层叠体,信息信号可以从介质的一侧被光学记录和再现。 分别在记录层中提供数据区。 信息信号可以被记录在数据区上并从数据区再现,而从光拾取器发射的激光束被施加到数据区。 光记录测试区域分别设置在记录层中。 测试信号可以记录在光学记录测试区域上并从光学记录测试区域再现,以确定用于信号记录的激光束的最佳功率值。 在激光束的传播方向观察时,测试区域不重叠。
    • 78. 发明授权
    • Varying a scanning beam as a function of bearing temperature of an
optical lens actuator
    • 根据光学透镜致动器的轴承温度改变扫描光束
    • US5343459A
    • 1994-08-30
    • US39265
    • 1993-04-16
    • Andreas RoesingerGuenter Noetzel
    • Andreas RoesingerGuenter Noetzel
    • G11B7/09G11B7/126G11B7/00
    • G11B7/126G11B7/0946
    • A circuit arrangement for scanning optical recording carriers comprises a scanning device, a first control loop for focusing a light beam of the scanning device directed onto the information plane of the recording carrier and a second control loop for guiding the light beam on an information track. The first control loop exhibits a first control amplifier which is supplied with focus error signals and the second control loop exhibits a second control amplifier which is supplied with track error signals. The control amplifiers drive actuators which mechanically guide the scanning device. To compensate for the temperature response of the control gain, controlling elements connected to temperature sensors via gain controllers are arranged in the first and second control loop, which controlling elements temperature-dependently change the gains.
    • PCT No.PCT / DE91 / 00746 Sec。 371日期:1993年04月16日 102(e)日期1993年4月16日PCT 1991年9月19日PCT公布。 出版物WO92 / 07357 一种用于扫描光学记录载体的电路装置包括扫描装置,用于聚焦被引导到记录载体的信息平面上的扫描装置的光束的第一控制回路和用于引导 光束在信息轨道上。 第一控制环路呈现出被提供有聚焦误差信号的第一控制放大器,而第二控制环路呈现出被提供有磁道误差信号的第二控制放大器。 控制放大器驱动机械地引导扫描装置的致动器。 为了补偿控制增益的温度响应,通过增益控制器连接到温度传感器的控制元件被布置在第一和第二控制回路中,该控制元件温度依赖地改变增益。
    • 79. 发明授权
    • Servo apparatus for compensating for warp and deflection deviations on
optical discs
    • 用于补偿光盘上的翘曲和偏转偏差的伺服装置
    • US4710908A
    • 1987-12-01
    • US652451
    • 1984-09-19
    • Ken OhshimaTadashi Shimizu
    • Ken OhshimaTadashi Shimizu
    • G11B7/00G11B7/004G11B7/007G11B7/09G11B7/095G11B7/12G11B7/125G11B7/126G11B33/10
    • G11B33/10G11B7/126G11B7/0908G11B7/0945G11B7/0956
    • Apparatus for compensating for physical deviations due to warp and surface deflections in optical discs during optical recording and reproducing operations. Focus error signals are developed corresponding to the individual addresses of the physical deviations and the extent of deviation from the in-focus position of the focusing lens by moving a light pickup under control of a microcomputer radially of the disc so that N given radial pitch intervals are defined relative to the record surface of the optical discs and M circumferential address positions of each rotation of the disc. The detector detects the focus error signal values at M.sub.x N.sub.x address locations which are memorized in a memory storing M.times.N values and these are used for developing control signals for moving a focusing lens vertically with an actuator activated by the control signals so that the position of the focusing lens vertically is positioned relative to the record surface so that the focus distance to the record surface is compensated for the physical deviations and an in-focus condition obtained. An arithmetic unit develops light intensity correction values from the memorized data and from this power correction values signals are applied to the source of light beam so that the light beam is applied to the record surface as a spot of proper area dimensions and intensity compensated for the physical deviations.
    • 用于在光学记录和再现操作期间补偿由于光盘中的翘曲和表面偏转引起的物理偏差的装置。 通过在微型计算机在盘的径向控制下移动光拾取器,对应于物理偏差的个别地址以及与聚焦透镜的对焦位置偏离的程度而产生对焦误差信号,使得N个给定的径向间距间隔 相对于光盘的记录表面定义,并且每个盘的旋转的M个圆周地址位置。 检测器检测存储在存储MxN值的存储器中存储的MxNx个地址位置处的聚焦误差信号值,并且它们用于开发用于通过由控制信号激活的致动器垂直移动聚焦透镜的控制信号,使得聚焦位置 透镜垂直地相对于记录表面定位,使得到记录表面的聚焦距离被补偿了物理偏差和获得的对焦条件。 算术单元从存储的数据中产生光强度校正值,并且从该功率校正值将信号施加到光束源,使得光束被施加到记录表面,作为适当面积尺寸和强度补偿的点 身体偏差。