标题： 误差传播： Shack-Hartmann 传感器和曲率传感器的比较 显示英文标题

标题： Error propagation: a comparison of Shack-Hartmann and curvature sensors

摘要： 自适应光学系统中的相位估计是通过使用如夏克-哈特曼传感器或曲率传感器之类的波前传感器来计算的。 在任何情况下，相位估计的标准误差与测量的标准误差成正比；但误差传播因子不同。 我们计算了曲率传感器和夏克-哈特曼传感器的这些因子的比值，该比值取决于圆形孔径上的传感器数量n。 如果保持传感器间距不变而增大孔径，则比值随着n^0.4增加。 当在同一孔径上容纳更多传感元件时，增加得更快，即与n^0.8成比例。 当传感元件数量很大时，这种增加可能会限制曲率传感器的适用性。 显示英文摘要

摘要： Phase estimates in adaptive-optics systems are computed by use of wavefront sensors such as Shack-Hartmann or curvature sensors. In either case the standard error of the phase estimates is proportional to the standard error of the measurements; but the error-propagation factors are different. We calculate the ratio of these factors for curvature and Shack-Hartmann sensors in dependence on the number of sensors, n, on a circular aperture. If the sensor spacing is kept constant and the pupil is enlarged, the ratio increases as n^0.4. When more sensing elements are accommodated on the same aperture, it increases even faster, viz. proportional to n^0.8. With large numbers of sensing elements this increase can limit the applicability of curvature sensors.