AN-X2-AB-DHRIO

AN-X2-AB-DHRIO

AN-X2-AB-DHRIO

AN-X2-AB-DHRIO

AN-X2-AB-DHRIO

AN-X2-AB-DHRIO

自适应光学（AO）是实时测量波阵面误差和畸变，并实时校正的一门技术。典型的AO系统包含三个要部件 : 

《联系人；欧先生》
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1、波前传感器（WFS）测量误差和畸变；

2、控制系统，计算出需要纠正的量，并驱动校正设备；

3、波前校正设备，用于补偿波阵面畸变量。

常用的WFS称为经典夏克哈特曼波前传感器（SH-WFS），这套设备在1971年被 用于NASA和美国军事项目。

这套系统基于基本的光学原理: 光波在均匀介质中沿直线传播，波前是垂直于传播方向的面。WFS通过微透镜阵列把光束分为许多束光（子孔径），这些光束聚焦在一个二维图像器件上或相机上。假如波阵面有畸变，聚焦的点位就会发生移动，这样移动的位置与波阵面就会形成一一对应的关系。 

这里的控制系统，其实是一个典型的带有控制算法软件的计算机。目的是确定各个聚焦点位，从而推算出波前倾斜和波前重构的信息， 终把这些信息传给波前校正器。

常用的波前校正器是变形镜（DM），受各种不同应用的驱动，市场上出现了各种不同类型的变形镜。在极端情况下的天文自适应系统，有 少不足20个， 多超过4000个驱动单元控制MEMS变形镜。

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