Adaptive Periodic-Correlation (APC) algorithm was developed for use in extended-scene Shack-Hartmann wavefront sensors. It provides high-accuracy even when the sub-images in a frame captured by a Shack-Hartmann camera are not only shifted but also distorted relative to each other. Recently we found that the shift-estimate error of the APC algorithm has a component that depends on the content of extended-scene. In this paper we assess the amount of that error and propose a method to minimize it.
Extended scene SH wavefront sensor algorithm: Minimization of scene content dependent shift estimation errors
01.03.2012
1051536 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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