Measurement system and lithographic apparatus for measuring a position dependent signal of a movable object
    45.
    发明授权
    Measurement system and lithographic apparatus for measuring a position dependent signal of a movable object 有权
    用于测量可移动物体的位置相关信号的测量系统和光刻设备

    公开(公告)号:US08457385B2

    公开(公告)日:2013-06-04

    申请号:US13019587

    申请日:2011-02-02

    IPC分类号: G06K9/00

    摘要: An encoder-type measurement system is configured to measure a position dependent signal of a movable object, the measurement system including at least one sensor mountable on the movable object a sensor target object mountable on a substantially stationary frame, and a mounting device configured to mount the sensor target object on the substantially stationary frame. The measurement system further includes a compensation device configured to compensate movements and/or deformations of the sensor target object with respect to the substantially stationary frame. The compensation device may include a passive or an active damping device and/or a feedback position control system. In an alternative embodiment, the compensation device includes a gripping device which fixes the position of the sensor target object during a high accuracy movement of the movable object.

    摘要翻译: 编码器型测量系统被配置为测量可移动物体的位置相关信号,所述测量系统包括可安装在可移动物体上的至少一个传感器,可安装在基本上固定的框架上的传感器目标物体,以及安装装置, 传感器目标物体在基本上固定的框架上。 测量系统还包括补偿装置,其被配置为补偿传感器目标物体相对于基本上静止的框架的运动和/或变形。 补偿装置可以包括无源或主动阻尼装置和/或反馈位置控制系统。 在替代实施例中,补偿装置包括夹持装置,其在可移动物体的高精度运动期间固定传感器目标物体的位置。