Some experiments are also done to calibrate incident beam.The incident beam going through the subapertures of Hartmann system projects on the focal plane to form light spots.

• 如果哈特曼-夏克系统相邻子孔径在焦 面的投影中心间距(焦斑点阵间距)比理想平面束中心间距大,入射光束为发散束;