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Moment-based wavefront reconstruction via a defocused Shack–Hartmann sensor
2018
Optical Engineering: The Journal of SPIE
An approach for wavefront reconstruction based on a defocused Shark-Hartmann sensor is proposed. In this approach, not only the first-order origin moment (local slope of the input wavefront) but also the second-order central moment (local curvature of the input wavefront) of each spot in the intensity pattern is used to reconstruct the input wavefront. By introducing the second-order moment, an improvement of reconstruction accuracy can be obtained. As the ambiguity of the sense of the local
doi:10.1117/1.oe.57.7.074106
fatcat:dc6lnovgrnaclnmz4o6chpkqh4