Wavefront Reconstruction Methods for Adaptive Optics Systems on Ground-Based Telescopes

摘要: The earth's atmosphere is not a perfect media through which to view objects in outer-space; turbulence the atmospheric temperature distribution results refractive index variations that interfere with propagation of light. As result, wavefronts are nonplanar when they reach ground. deviation from planarity wavefront known as phase error, and it error causes blurring images. Adaptive optics systems seek remove incoming wavefronts. In ground-based astronomy, an estimate typically obtained gradient measurements collected by Shack-Hartmann sensor. then used create counter wavefront, e.g., using deformable mirror (approximately) removes problem reconstructing requires solution large linear system whose form defined configuration We derive this present both regular least squares minimum variance approaches its solution. most effective existing presented alongside new computational methods, comparisons made.