公开(公告)号：EP0737963A3

公开(公告)日：1998-07-08

申请号：EP96301864

申请日：1996-03-19

申请人： DISCOVISION ASS

发明人： GRASSENS LEONARDUS JOHANNES ,  GETREUER KURT WALTER

IPC分类号： G11B5/55 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/007 ,  G11B7/085 ,  G11B7/09 ,  G11B7/135 ,  G11B11/105 ,  G11B17/04 ,  G11B20/10 ,  G11B20/12 ,  G11B21/10 ,  H02K41/035

CPC分类号： G11B7/0037 ,  G11B7/004 ,  G11B7/00745 ,  G11B7/08529 ,  G11B7/08582 ,  G11B7/09 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/093 ,  G11B7/0932 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/0943 ,  G11B7/0945 ,  G11B7/1356 ,  G11B11/10563 ,  G11B11/10576 ,  G11B11/10595 ,  G11B17/043 ,  G11B17/0438 ,  G11B20/10009 ,  G11B20/1258 ,  G11B21/10 ,  G11B21/106 ,  G11B2007/0919 ,  G11B2020/10916 ,  H02K41/0354 ,  H02K41/0356

摘要： An assembly for controlling the position of a lens in an optical data storage and retrieval drive includes a carriage that suspends a lens holder using a plurality of flexures. A lens is mounted in the lens holder such that the center of mass of the suspended lens holder lies on the optical axis of the lens, and also coincides with the center of mass of the lens. The lens holder is capable of relative motion with respect to the carriage with at least one degree of freedom. The center of mass of the carriage lies within 0.1 mm of the optical axis, proximate the center of mass of the lens holder. Suspensory forces acting on the lens holder are symmetric about the optical axis. A coarse magnetic drive moves the carriage in a tracking direction, and exerts forces on the carriage that are balanced and symmetric about the optical axis, so that moments about the center of mass of the carriage are effectively absent. Inertial forces acting on the carriage, and forces reactive to the magnetic drive forces are also balanced and symmetric with respect to the optical axis, and produce insubstantial moments about the center of mass of the carriage. There is a fine tracking and a focusing drive for the lens holder. Both of these drives produce balanced and symmetric forces about the optical axis, such that moments about the optical axis are absent. Inertial forces and reactive forces acting on the suspended lens holder are also symmetric about the optical axis. As a result the objective lens moves along its optical axis, and in its tracking direction without change in attitude, and its focal point can be precisely controlled with respect to the surface of a storage medium being read or written.

摘要翻译： 一种用于控制光学数据存储和取回驱动器中的透镜的位置的组件包括托架，该托架使用多个挠曲来悬挂透镜保持器。 透镜安装在透镜架中，使得透镜架的质心位于透镜的光轴上，并且也与透镜的质心一致。 透镜架能够以至少一个自由度相对于滑架进行相对运动。 滑架的质心位于光轴的0.1毫米范围内，靠近镜头支架的质心。 作用在透镜架上的悬置力是关于光轴对称的。 粗磁驱动器使滑架沿跟踪方向移动，并且在滑架上施加力，使其平衡并且关于光轴对称，从而实际上不存在围绕滑架质心的力矩。 作用在托架上的惯性力以及与磁力驱动力反应的力也是平衡的并且相对于光轴对称，并且围绕托架质量中心产生非实质性的力矩。 镜头架有一个精确的跟踪和聚焦驱动。 这两种驱动器均产生关于光轴的平衡且对称的力，使得围绕光轴的力矩不存在。 作用在悬浮式透镜架上的惯性力和反作用力也关于光轴对称。 结果，物镜沿着其光轴移动，并且在其跟踪方向上移动而不改变姿态，并且其焦点可以相对于被读取或写入的存储介质的表面精确地控制。