公开(公告)号：US5724197A

公开(公告)日：1998-03-03

申请号：US696763

申请日：1996-08-14

申请人： Lawrence A. Barnes ,  Philip Frank Marino ,  Gary R. Bisson

发明人： Lawrence A. Barnes ,  Philip Frank Marino ,  Gary R. Bisson

IPC分类号： G11B7/09 ,  G11B7/095 ,  G02B7/02

CPC分类号： G11B7/0956 ,  G11B7/0932

摘要： An optical actuator for positioning a lens to focus a laser light beam on a surface of a compact disk, and to compensate for tilt errors in the surface of the compact disk, including a lens mount for supporting the lens; a base; at least two pairs of spaced-apart flexures, each pair of flexures being fixed to the lens mount and to a base, the flexures of one pair being arranged so that they are non-parallel when viewed from the side and the distance between flexures at the base is less than the distance at the position where they are mounted to the lens mount and the other pair of flexures being arranged so that they are non-parallel when viewed from the side and the distance between flexures at the base is greater than the distance at the position where they are mounted to the lens mount; and applying a force to the lens mount along a line and between the flexures so that when viewed from the parallel flexure side the line bisects each flexure to cause the flexures to deflect such that as the lens moves in a vertical direction to focus the light beam, it also rotates to maintain a nearly perpendicular alignment of the optical axis to the compact disk surface, minimizing the residual tilt error.

摘要翻译： 一种光学致动器，用于定位透镜以将激光束聚焦在光盘的表面上，并补偿光盘的表面中的倾斜误差，包括用于支撑透镜的透镜座; 一个基地 至少两对间隔开的弯曲部，每对挠曲件固定到透镜安装件和底座上，一对的弯曲部被布置成使得它们在从侧面观察时是不平行的， 基座小于其安装在透镜座上的位置处的距离，另一对弯曲部被布置成使得它们在从侧面观察时不平行，并且基座处的弯曲之间的距离大于 在它们被安装到镜头座的位置处的距离; 并且沿着线路和弯曲部之间向镜片支架施加力，使得当从平行弯曲侧观察时，线将每个弯曲部分平分，以使得弯曲部偏转，使得当透镜沿垂直方向移动以聚焦光束 ，它也旋转以保持光轴与光盘表面几乎垂直对准，从而最小化残余倾斜误差。