Pannetier Cyril, Hénault François
Opt Lett. 2020 Apr 1;45(7):1746-1749. doi: 10.1364/OL.382718.
With respect to the classical Shack-Hartmann (SH) wavefront sensor (WFS), the recently proposed reverse Hartmann (RH) sensor inverts the locations of the filtering and observation planes and forms a direct image of the pupil on a detector array. The slopes of the wavefront error (WFE) are then reconstructed by using a double Fourier transform algorithm. It turns out that the same algorithm can also be applied to the raw data acquired by SH sensors. This Letter presents the first, to the best of our knowledge, experimental results obtained with a simplified RH WFS and their comparison to those provided by a reference SH sensor, in both classical and double Fourier transform modes. They demonstrate that similar WFE measurement accuracy is achievable when using the three techniques, at least within the limit of our test bench that is estimated around $\lambda/10$λ/10 RMS.
对于经典的夏克-哈特曼（SH）波前传感器（WFS），最近提出的反向哈特曼（RH）传感器颠倒了滤波平面和观测平面的位置，并在探测器阵列上形成瞳孔的直接图像。然后使用双傅里叶变换算法重建波前误差（WFE）的斜率。事实证明，相同的算法也可以应用于SH传感器采集的原始数据。据我们所知，本文首次展示了使用简化的RH WFS获得的实验结果，以及在经典模式和双傅里叶变换模式下与参考SH传感器提供的结果的比较。结果表明，使用这三种技术至少在我们测试台的限制范围内（估计约为λ/10 RMS）可以实现相似的WFE测量精度。
