Centroids analysis for circle of confusion in reverse Hartmann test

Zhao Zhu^{1, 2}, Hui Mei^{1, 2, †}, Xia Zheng-Zheng^{1, 2}, Zhao Yue-Jin^{1, 2}

Fringe images for centroid computation in the coaxial RHT experiments. They are formed by (a) flat crystal, (b) spherical mirror, and (c) OAP mirror.