公开(公告)号：US06594205B1

公开(公告)日：2003-07-15

申请号：US09498259

申请日：2000-02-03

申请人： Jan W. Aarts ,  Jan P. Baartman ,  Gerard E. Van Rosmalen

发明人： Jan W. Aarts ,  Jan P. Baartman ,  Gerard E. Van Rosmalen

IPC分类号： G11B700

CPC分类号： G11B7/1372 ,  G11B7/0935

摘要： An optical scanning device includes a radiation source; an optical lens system with an optical axis for focusing a radiation beam supplied, in operation, by the radiation source into a scanning spot on an information carrier, the lens system including a housing, a first lens which is secured in the housing in a fixed position, and a second lens which, viewed in a direction parallel to the optical axis, is elastically suspended in the housing; a first actuator for displacing the lens system in a direction parallel to the optical axis; a first control unit for controlling the first actuator by means of a first control signal; a second actuator for displacing the second lens relative to the first lens in a direction parallel to the optical axis; and a second control unit for controlling the second actuator by means of a second control signal, and in which during operation, the first control unit also controls the second actuator by means of a third control signal which is proportional to the first control signal.

摘要翻译： 光学扫描装置包括辐射源; 光学透镜系统，其具有用于将由辐射源在操作中提供的辐射束聚焦到信息载体上的扫描点的光轴，所述透镜系统包括壳体，第一透镜，固定在壳体中的固定 并且从平行于光轴的方向观察的第二透镜弹性地悬挂在壳体中; 用于使所述透镜系统沿与所述光轴平行的方向移位的第一致动器; 第一控制单元，用于通过第一控制信号控制第一致动器; 第二致动器，用于在平行于光轴的方向上相对于第一透镜移位第二透镜; 以及第二控制单元，用于通过第二控制信号控制第二致动器，并且其中在操作期间，第一控制单元还通过与第一控制信号成比例的第三控制信号来控制第二致动器。

公开(公告)号：US06310840B1

公开(公告)日：2001-10-30

申请号：US09294609

申请日：1999-04-19

申请人： Jan P. Baartman ,  Jan W. Aarts

发明人： Jan P. Baartman ,  Jan W. Aarts

IPC分类号： G11B709

CPC分类号： B82Y10/00 ,  G11B7/0932 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/1374 ,  G11B7/1387 ,  G11B7/13925

摘要： An optical player includes an optical scanning device. The scanning device includes an optical lens system for focusing a light beam into a scanning spot on a track of an information carrier. The scanning device includes a first actuator for displacing the lens system parallel to an optical axis for focusing the light beam on the information carrier. The lens system includes a main lens or objective lens and an auxiliary or solid immersion lens, providing the lens system with a large numerical aperture, so that the scanning device is suitable for scanning information carriers with a high information density, such as, for example, high density compact discs. The auxiliary lens is secured in a fixed position to a housing of the lens system, while the main lens is suspended in the housing in a direction parallel to the optical axis by an elastically deformable mounting unit. The lens system includes a second actuator for moving the main lens relative to the auxiliary lens in a direction parallel to the optical axis for compensating for spherical aberration in a transparent protection layer of the information carrier. Thus, the necessary power of the first actuator is limited considerably.

摘要翻译： 光学播放器包括光学扫描装置。 扫描装置包括用于将光束聚焦到信息载体的轨道上的扫描点中的光学透镜系统。 扫描装置包括用于使透镜系统平行于光轴移动以将光束聚焦在信息载体上的第一致动器。 透镜系统包括主透镜或物镜和辅助或固体浸没透镜，为透镜系统提供大的数值孔径，使得扫描装置适合扫描具有高信息密度的信息载体，例如 ，高密度光盘。 辅助透镜固定在透镜系统的壳体的固定位置，而主透镜通过可弹性变形的安装单元沿平行于光轴的方向悬挂在壳体中。 透镜系统包括第二致动器，用于沿着平行于光轴的方向相对于辅助透镜移动主透镜，以补偿信息载体的透明保护层中的球面像差。 因此，第一致动器的必要功率受到相当大的限制。

公开(公告)号：US06256287B1

公开(公告)日：2001-07-03

申请号：US09294608

申请日：1999-04-19

申请人： Jan P. Baartman ,  Jan W. Aarts

发明人： Jan P. Baartman ,  Jan W. Aarts

IPC分类号： G11B700

CPC分类号： B82Y10/00 ,  G11B7/0932 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/1372 ,  G11B7/22 ,  G11B2007/13727

摘要： In an optical recorder and/or player the lens system of the scanning device focuses the light beam into a scanning spot on the information carrier. The lens system includes a main or objective lens and an auxiliary or solid immersion lens to provide the large numerical aperture required for scanning information carriers with a high information density, such as high-density compact discs. At least one lens, in particular the main lens, is suspended in a housing in a direction parallel to the optical axis of the lens system by two elastically deformable mounting elements. When viewed parallel to the optical axis, the mounting elements are distal from each other, and each allow tilting movements of the lens about tilt axes perpendicular to the optical axis, and are substantially undeformable in directions perpendicular to the optical axis. During manufacture of the lens system, the lenses are aligned relative to each other by shifting at least one of the mounting elements in directions perpendicular to the optical axis. The lenses may be positioned parallel to each other by shifting one of the mounting elements in a direction perpendicular to the optical axis, and centered relative to each other by shifting the non-suspended lens in a direction perpendicular to the optical axis. Thus, allowing accurate alignment of the lenses relative to each other using a simple manipulator with limited positioning possibilities.

摘要翻译： 在光学记录器和/或播放器中，扫描装置的透镜系统将光束聚焦到信息载体上的扫描点。 透镜系统包括主或物镜和辅助或固体浸没透镜，以提供用于扫描具有高信息密度的信息载体所需的大数值孔径，例如高密度光盘。 至少一个透镜，特别是主透镜，通过两个可弹性变形的安装元件在平行于透镜系统的光轴的方向上悬挂在壳体中。 当平行于光轴观察时，安装元件彼此远离，并且每个允许透镜围绕垂直于光轴的倾斜轴的倾斜运动，并且在垂直于光轴的方向上基本上不能变形。 在制造透镜系统期间，透镜通过沿垂直于光轴的方向移动至少一个安装元件来相对于彼此对准。 透镜可以通过沿着垂直于光轴的方向移动一个安装元件而彼此平行地定位，并且通过沿垂直于光轴的方向移动非悬挂透镜而相对于彼此定位。 因此，允许透镜相对于彼此的精确对准使用具有有限定位可能性的简单操纵器。

公开(公告)号：US6130789A

公开(公告)日：2000-10-10

申请号：US291430

申请日：1999-04-13

申请人： Jan W. Aarts ,  Jan P. Baartman

发明人： Jan W. Aarts ,  Jan P. Baartman

IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/135 ,  G11B7/1374 ,  G02B7/02

CPC分类号： G11B7/1374 ,  G11B7/0935 ,  G11B2007/13727 ,  G11B7/0927

摘要： An optical scanning device includes an optical lens system for focusing a light beam into a scanning spot on an information carrier. The lens system includes a housing containing a main or objective lens and an auxiliary or solid immersion lens with a ring-shaped holder. The lens combination provides a large numerical aperture, so that the scanning device is suitable for scanning information carriers with a high information density, such as high-density compact discs. The lens system also includes an actuator for displacing the lens system and for displacing the auxiliary lens with respect to the main lens in a direction parallel to an optical axis of the lens system for compensating for spherical aberration in a transparent protection layer of the information carrier. The actuator includes a ring-shaped magnetic closing yoke which is secured to a housing and includes two ring-shaped permanent magnets which, viewed parallel to the optical axis, are secured next to one another to the closing yolk. The magnets are magnetised in mutually opposite radial directions relative to the optical axis. The actuator also includes two ring-shaped electric coils, which are secured to a ring-shaped holder of the auxiliary lens. The coils are arranged, viewed parallel to the optical axis, next to one another and opposite the two magnets, and the coils are wound in mutually opposite directions. In this manner, the actuator of the lens system has a favorable ratio between its dimensions and its electromagnetic force, so that the dimensions and weight of the actuator necessary for obtaining a predetermined electromagnetic force can be limited.

摘要翻译： 光学扫描装置包括用于将光束聚焦到信息载体上的扫描点的光学透镜系统。 透镜系统包括容纳主物镜或物镜的壳体和具有环形保持器的辅助或固体浸没透镜。 镜头组合提供了大的数值孔径，使得扫描装置适合于扫描具有高信息密度的信息载体，例如高密度光盘。 透镜系统还包括用于移动透镜系统并且使辅助透镜相对于主透镜在平行于透镜系统的光轴的方向上移动的致动器，用于补偿信息载体的透明保护层中的球面像差 。 致动器包括环形磁性闭合轭，其固定到壳体并且包括平行于光轴观察的两个环形永磁体彼此相邻固定到闭合蛋黄。 磁体相对于光轴以相对的径向方向磁化。 致动器还包括固定在辅助透镜的环形保持器上的两个环形电线圈。 线圈被平行于光轴设置，彼此相邻并且与两个磁体相对，并且线圈以相互相反的方向缠绕。 以这种方式，透镜系统的致动器在其尺寸和其电磁力之间具有有利的比例，使得可以限制获得预定电磁力所需的致动器的尺寸和重量。