Large dynamic range Shack-Hartmann wavefront sensing based on a graph-theoretic computational model
Lintong Du·Jiamiao Yang·Shuxin Liu·Rongjun Shao·Lin Li·Yuhang Zhang·Ziqiang Li·Yuan Qu·Dapeng Tian·Rui Xu
Abstract The Shack-Hartmann wavefront sensor (SHWS) is a widely used non-interferometric wavefront measurement technique. However, for high-slope wavefronts, spot crosstalk and asymmetric distortion cause severe matching ambiguity and centroiding errors. This creates an inherent conflict between dynamic range and reconstruction accuracy. To address this, a graph-theoretic computational model named G-SHWS is proposed. By minimizing the global pairing cost of a bipartite graph constructed between