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Error propagation: a comparison of Shack–Hartmann and curvature sensors
Optical Society of America. Journal A: Optics, Image Science, and Vision
Phase estimates in adaptive-optics systems are computed by use of wavefront sensors such as Shack-Hartmann or curvature sensors. In either case the standard error of the phase estimates is proportional to the standard error of the measurements; but the error-propagation factors are different. We calculate the ratio of these factors for curvature and Shack-Hartmann sensors in dependence on the number of sensors, n, on a circular aperture. If the sensor spacing is kept constant and the pupil isdoi:10.1364/josaa.28.000801 pmid:21532691 fatcat:zyplo26uabh3rlqmslvdlj6iim