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1．引言光学头是一个安装在光学记录／再现设备(驱动器或者播放机)上的关键部件,它以非接触方式沿径向从放置在转台上的CD/DVD光盘上读取或者再现信息。光学头是通过力矩器来驱动物镜沿着盘片的道跟踪和聚焦方向进行调整,以便能够使激光束在指定的光盘轨道位置处聚焦形成满足要求的激光斑点。近来,随着高密度存储光盘和高数据传输率系统的兴起,高性能光
1. Introduction An optical pickup is a key component mounted on an optical recording / reproducing device (drive or player) that reads or reproduces information in a radial direction from a CD / DVD disc placed on a turntable in a non-contact manner. The optical head drives the objective lens through the torque converter to adjust along the track and focus direction of the disc so that the laser beam can be focused at the designated disc track position to form the desired laser spot. Recently, with the rise of high-density storage discs and high data transfer rate systems, high-performance light