Actuator with reduced lens tilt error
    2.
    发明授权
    Actuator with reduced lens tilt error 失效
    执行器具有减少的镜头倾斜误差

    公开(公告)号:US5659433A

    公开(公告)日:1997-08-19

    申请号:US655579

    申请日:1996-05-30

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

    CPC分类号: G11B7/0956 G11B7/0932

    摘要: An optical actuator is disclosed for positioning a lens to focus a laser light on a surface of a member, such as an optical disk, with minimum lens tilt error. The optical actuator includes a lens mount for supporting the lens, a plurality of flexures fixed to the lens mount, and a based spaced from the lens mount. The optical actuator further includes a motor structure for operating the actuator in energized and de-energized states. In the energized state, a force is applied to the lens mount to cause the lens mount to move in a focus direction. In the de-energized state, the flexures relax, causing the lens mount to move substantially in the focus direction. The optical actuator further includes an actuator travel stop disposed relative to the base and the lens mount for supporting the lens mount in a downward direction when the actuator is in the de-energized state, to thereby prevent the flexures from creeping in such a way so as to result in lens tilt.

    摘要翻译: 公开了一种光学致动器,用于定位透镜,以最小的透镜倾斜误差将激光聚焦在诸如光盘的构件的表面上。 光学致动器包括用于支撑透镜的透镜支架,固定到透镜支架的多个弯曲部以及与透镜支架基准的基准。 光学致动器还包括用于在致动和断电状态下操作致动器的电动机结构。 在通电状态下,将力施加到透镜支架以使透镜支架在聚焦方向上移动。 在断电状态下,挠曲松弛,使得透镜安装件在聚焦方向上基本上移动。 光学致动器还包括相对于基座设置的致动器行进止动件和用于在致动器处于断电状态时向下方向支撑透镜支架的透镜支架,从而防止弯曲部以这样的方式爬行 导致镜头倾斜。

    Multiple degrees of freedom actuator for optical recording
    3.
    发明授权
    Multiple degrees of freedom actuator for optical recording 失效
    用于光学记录的多自由度执行器

    公开(公告)号:US5986983A

    公开(公告)日:1999-11-16

    申请号:US971875

    申请日:1997-11-19

    IPC分类号: G11B7/09 G11B7/095 G11B7/00

    摘要: An optical actuator adapted to control the position of the actuator in at least two degrees of freedom of motion. The actuator includes a base, a moveable lens holder having a lens, a structure for connecting the lens holder to the base to support movement of the lens holder, and first and second pairs of surface-field motors, each pair of surface-field motors having first and second surface-field motors, each first and second surface-field motor including a surface-field coil and a surface-field magnetic assembly for applying forces to the lens holder to move the lens holder in at least two degrees of freedom of motion relative to the base, the surface-field coil being mounted on either the base or the lens holder, and the corresponding surface-field magnetic assembly being oppositely mounted on either the lens holder or the base to interact with the surface-field coil. Each surface-field magnetic assembly includes two pairs of opposing poles with one pair of opposing poles facing the corresponding surface-field coil, the opposing poles of each pair being separated by a pole dividing line so that the pole dividing lines of the opposing poles facing the surface-field coils of the surface-field magnetic assemblies of the first surface-field motor extend and intersect at a point above the surface-field coils, and the pole dividing lines of the opposing poles facing the surface-field coils of the surface-field magnetic assemblies of the second surface-field motor extend and intersect at a point below the surface-field coils. Currents are selectively applied to the surface-field coils so that the surface-field motors apply forces to the lens holder to control at least two degrees of freedom of motion of the lens holder relative to the base.

    摘要翻译: 适于在至少两个运动自由度中控制致动器的位置的光致动器。 致动器包括基座,具有透镜的可移动透镜保持器,用于将透镜保持器连接到基座以支撑透镜保持器的运动的结构,以及第一和第二对表面场马达,每对表面场马达 具有第一和第二表面场电动机,每个第一和第二表面场电动机包括表面场线圈和表面场磁性组件,用于向透镜保持器施加力以使透镜架以至少两个自由度移动 相对于基座的运动,表面场线圈安装在基座或透镜架上,并且相应的表面场磁性组件相对地安装在透镜架或底座上以与表面场线圈相互作用。 每个表面场磁性组件包括两对相对的极,其中一对相对的极面对着相应的表面场线圈,每对的相对的极通过极分割线分开,使得相对极的极分割线面对 第一表面场电动机的表面场磁性组件的表面场线圈在表面场线圈上方的一点上延伸并相交,并且相对极的极分界线面对表面的表面场线圈 第二表面场电动机的场磁组件在表面场线圈下方的点处延伸并相交。 选择性地将电流施加到表面场线圈,使得表面场电机将力施加到透镜架以控制透镜保持器相对于基座的至少两个自由度。

    Robust method for determining an imaging system focus error
    4.
    发明授权
    Robust method for determining an imaging system focus error 失效
    用于确定成像系统聚焦误差的稳健方法

    公开(公告)号:US5396058A

    公开(公告)日:1995-03-07

    申请号:US74900

    申请日:1993-06-10

    IPC分类号: G02B7/36 H04N5/232 G01J1/20

    CPC分类号: H04N5/23212 G02B7/36

    摘要: A robust method for determining a radiation imaging system focus error, that employs a focus sensor and an accompanying curve determined analytically or empirically according to the characteristics of the sensor, is disclosed. In a preferred embodiment, the focus sensor comprises two beamsplitters, a spacer, and three detectors comprising CCD array. The three detectors are constrained to satisfy radiation path length specifications, with respect to the beamsplitters and spacer. In the method, the curve representing variance vs. focus position is empirically determined. The focus sensor may then be aligned in an unused portion of an imaging system radiation field. The detectors simultaneously image the same scene, sampling it at three different focus positions. These sampled points are then fit to the empirically determined curve; a maximum of the fitted curve is a robust measure of the imaging system focus error.

    摘要翻译: 公开了一种用于确定辐射成像系统聚焦误差的鲁棒方法,其采用根据传感器的特性分析或经验确定的聚焦传感器和伴随曲线。 在优选实施例中,聚焦传感器包括两个分束器,间隔器和包括CCD阵列的三个检测器。 相对于分束器和间隔物,三个检测器被约束以满足辐射路径长度规格。 在该方法中,代表方差与焦点位置的曲线是经验确定的。 焦点传感器然后可以对准成像系统辐射场的未使用部分。 检测器同时对同一场景进行成像,在三个不同的焦点位置进行采样。 然后将这些采样点拟合为经验确定的曲线; 拟合曲线的最大值是成像系统聚焦误差的鲁棒测量。

    Measuring and compensating for warp in an optical recording disk
    5.
    发明授权
    Measuring and compensating for warp in an optical recording disk 失效
    测量和补偿光学记录盘中的翘曲

    公开(公告)号:US5910936A

    公开(公告)日:1999-06-08

    申请号:US852987

    申请日:1997-05-08

    申请人: Philip F. Marino

    发明人: Philip F. Marino

    IPC分类号: G11B7/095 G11B7/00

    CPC分类号: G11B7/0956

    摘要: Apparatus for measuring warp of an optical disk is disclosed. The apparatus includes an actuator having a base and a moveable lens holder, the lens holder being moveable in a vertical direction relative to the base. The apparatus further includes a structure for moving the actuator to selected positions relative to the surface of the disk and for measuring the vertical displacement of the disk surface relative to the actuator base at each of the selected positions, a structure for providing displacement signals corresponding to the vertical displacement of the disk surface at each of the selected positions, and a structure responsive to the displacement signals for computing a radial tilt matrix and a tangential tilt matrix of optical disk surface tilt values, the matrices representing the warp of the surface of the disk.

    摘要翻译: 公开了一种用于测量光盘翘曲的装置。 该装置包括具有基座和可移动透镜架的致动器,透镜架可相对于基座在垂直方向上移动。 该装置还包括用于将致动器相对于盘的表面移动到选定位置并且用于在每个选定位置处测量盘表面相对于致动器基座的垂直位移的结构,用于提供对应于 在每个所选择的位置处的盘表面的垂直位移以及响应于用于计算光盘表面倾斜值的径向倾斜矩阵和切向倾斜矩阵的位移信号的结构,所述矩阵表示 磁盘。

    Actuator with single surface-field motor
    6.
    发明授权
    Actuator with single surface-field motor 失效
    带单面电机的执行机构

    公开(公告)号:US5768037A

    公开(公告)日:1998-06-16

    申请号:US656655

    申请日:1996-05-31

    IPC分类号: G11B7/09 G02B7/02

    摘要: A lens actuator for an optical disc storage device including a base; a lens holder assembly movably mounted to said base; said lens holder assembly comprising a lens holder with a single surface-field magnet and a lens mounted thereon; a single surface-field coil set mounted to said base parallel to and proximate said surface-field magnet; whereby a current introduced in a coil of said coil set produces a net magnetic force having a resultant line of action passing through said lens holder assembly.

    摘要翻译: 一种用于包括基座的光盘存储装置的透镜致动器; 可移动地安装到所述基座的透镜保持器组件; 所述透镜保持器组件包括具有单个表面场磁体的透镜架和安装在其上的透镜; 单个表面场线圈组,安装到平行于所述表面场磁体并靠近所述表面场磁体的所述基座; 由此引入到所述线圈组的线圈中的电流产生具有通过所述透镜保持器组件的合成线作用的净磁力。

    A method for determining a surface topology of a workpiece
    7.
    发明授权
    A method for determining a surface topology of a workpiece 失效
    一种用于确定工件的表面拓扑的方法

    公开(公告)号:US5309375A

    公开(公告)日:1994-05-03

    申请号:US937816

    申请日:1992-08-31

    IPC分类号: G01B11/24

    CPC分类号: G01B11/24

    摘要: A method for determining a surface topology of a workpiece preferably comprising a general symmetric asphere. The method includes the steps of coupling a projectile to a surface of a workpiece, and imparting a trajectory to the projectile with respect to the surface; sensing the trajectory of the projectile with respect to the workpiece surface, for assessing a locus of positional points over time of the projectile, the locus being a measure of the surface topology of the workpiece; and computing from the locus of positional points over time, the surface topology of the workpiece.

    摘要翻译: 一种用于确定工件的表面拓扑的方法,优选地包括一般的对称非球面。 该方法包括以下步骤:将射弹耦合到工件的表面,并且相对于表面赋予射弹的轨迹; 感测射弹相对于工件表面的轨迹,用于评估随着射弹的时间点的位置点的轨迹,轨迹是工件的表面拓扑的度量; 并且从位置点的位置随着时间的推移计算工件的表面拓扑。

    Optical actuator with tensioned suspension
    8.
    发明授权
    Optical actuator with tensioned suspension 失效
    具有张紧悬挂的光学执行器

    公开(公告)号:US5986825A

    公开(公告)日:1999-11-16

    申请号:US974662

    申请日:1997-11-19

    IPC分类号: G11B7/09 G02B7/02

    CPC分类号: G11B7/0932 G11B7/093

    摘要: An optical recording actuator includes: a base and a lens holder having a lens. A pair of spaced-apart flexible, inextensible, coplanar connecting members are connected between the base and the lens holder. A force is applied to the lens holder in the plane of the connecting members to generate tension in the connecting members. A motor applies forces and moments to the lens holder so that the lens holder can move the lens in a desired manner. The resulting actuator has four controllable degrees of freedom of motion relative to the base: focus, tracking, pitch and roll.

    摘要翻译: 光学记录致动器包括:基座和具有透镜的透镜保持器。 一对间隔开的柔性,不可伸展的共面连接构件连接在基座和透镜架之间。 在连接构件的平面中对透镜架施加力,以在连接构件中产生张力。 电机将力和力矩施加到透镜保持器,使得透镜保持器可以以期望的方式移动透镜。 所产生的致动器具有相对于基座的四个可控自由度:聚焦,跟踪,俯仰和滚动。

    Magnetically suspended optical recording actuator
    9.
    发明授权
    Magnetically suspended optical recording actuator 失效
    磁悬浮光记录执行器

    公开(公告)号:US5740139A

    公开(公告)日:1998-04-14

    申请号:US694974

    申请日:1996-08-09

    IPC分类号: G11B7/09 G11B7/095

    摘要: An optical actuator is disclosed which includes a base, a moveable lens holder including an objective lens and positioned relative to the base, and at least six planar magnetic coils and a plurality of magnetic assemblies arranged to be associated with the coils, each of the assemblies including magnets having two or more poles fixed to the actuator base, the coils and the magnets being mounted relative to each other on the lens holder and the base. The actuator includes circuitry for applying signals to the coils to induce magnetic fields in the coils for positioning the lens holder and detectors for providing signals representing the four degrees of freedom of positions of the lens holder with respect to the base. A computational circuitry responsive to the detectors determines the coil signals for positioning the moveable lens holder in six degrees of freedom of motion relative to the base.

    摘要翻译: 公开了一种光学致动器,其包括基座,包括物镜并且相对于基座定位的可移动透镜保持器,以及布置成与线圈相关联的至少六个平面磁性线圈和多个磁性组件,每个组件 包括具有固定到致动器基座的两个或多个极的磁体,线圈和磁体相对于彼此安装在透镜架和底座上。 致动器包括用于向线圈施加信号以产生线圈中的磁场以用于定位透镜保持器和检测器的电路,用于提供表示透镜保持器相对于基座的位置的四个自由度的信号。 响应于检测器的计算电路确定线圈信号,用于将可移动透镜保持器相对于基座的六个自由度定位。

    Assembly for static control and dynamic damping of an optical element
    10.
    发明授权
    Assembly for static control and dynamic damping of an optical element 失效
    用于光学元件的静态控制和动态阻尼的组件

    公开(公告)号:US5079641A

    公开(公告)日:1992-01-07

    申请号:US583639

    申请日:1990-09-17

    IPC分类号: G02B7/182

    CPC分类号: G02B7/182

    摘要: An assembly suitable for statically controlling and dynamically damping an optical element, for example, a secondary mirror. The assembly realizes a novel design technique which treats the problems of static control and dynamic damping of the optical element, as subsumed moments of one independent problem. The one interdependent problem may be solved by way of a single structural design, featuring a unique lever arm, which can provide overlapping functions responsive, at one and the same time, to both moments.

    摘要翻译: 适用于静态控制和动态阻尼光学元件的组件,例如辅助镜。 该装置实现了一种新颖的设计技术,其将静态控制和光学元件的动态阻尼问题作为一个独立问题的归宿时刻。 一个相互依赖的问题可以通过单一的结构设计来解决,其特征在于具有独特的杠杆臂,其可以在两个时刻同时提供响应的重叠功能。