Centroids analysis for circle of confusion in reverse Hartmann test
Zhao Zhu1, 2, Hui Mei1, 2, †, Xia Zheng-Zheng1, 2, Zhao Yue-Jin1, 2
       

(color online) Gray compensation with 2D Gaussian fitting for the fringes in the (a) horizontal and (b) vertical directions. The reflector surface is flat.