Centroiding and extraction of tip/tilt information from nonlinear curvature wavefront sensor measurements
Caleb G. Abbott,
Justin Crepp,
Stanimir Letchev
et al.
Abstract:The nonlinear curvature wavefront sensor (nlCWFS) uses multiple (typically four) out-of-focus images to reconstruct the phase and amplitude of a propagating light beam. Because these images are located between the pupil and focal planes, they contain tip/tilt information. Rather than using a separate sensor to measure image locations, it would be beneficial to extract tip/tilt information directly and routinely as part of the reconstruction process. In the presence of atmospheric turbulence, recovering precise… Show more
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