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    • 1. 发明授权
    • Focusing bias adjusting apparatus and method in optical recording medium playing apparatus
    • 聚焦偏差调节装置和方法在光记录介质播放装置中
    • US06295256B1
    • 2001-09-25
    • US09577626
    • 2000-05-25
    • Yuichi KimikawaMotoi KimuraHitoshi YamazakiAlex BradshawMorio Nozaki
    • Yuichi KimikawaMotoi KimuraHitoshi YamazakiAlex BradshawMorio Nozaki
    • G11B700
    • G11B7/094G11B7/0908G11B7/0956
    • A focusing bias adjusting apparatus in an optical recording medium playing apparatus, in which a focusing bias adjustment is executed to remove an offset component in a focusing error signal based on each output signal of a split type photodetector in an optical pickup and, thereafter, a tilt adjustment is executed to an optical system so as to maximize a read signal serving as a sum signal of the output signals of the photodetector in order to compensate a tilt angle which is defined by a normal at the irradiating position of a laser beam from the optical pickup on the recording surface of an optical recording medium and the optical axial direction of the laser beam. When the tilt adjusting operation of the optical system of the optical pickup is performed after completion of the focusing bias adjustment, the focusing bias adjustment is executed again.
    • 一种光记录介质播放装置中的聚焦偏移调节装置,其中执行聚焦偏置调整以基于光学拾取器中的分离型光电检测器的每个输出信号去除聚焦误差信号中的偏移分量,之后, 对光学系统执行倾斜调整,以使作为光电检测器的输出信号的和信号的读取信号最大化,以补偿由来自该光电检测器的激光束的照射位置处的法线限定的倾斜角 光学记录介质的记录表面上的光学拾取器和激光束的光轴方向。 当在聚焦偏差调整完成之后执行光学拾取器的光学系统的倾斜调节操作时,再次执行聚焦偏置调整。