A Multifractal-Based Wavefront Phase Estimation Technique for Ground-Based Astronomical Observations

摘要: Turbulence in the Earth's atmosphere interferes with propagation of planar wavefronts from outer space, resulting a phase-distorted nonplanar wavefront. This phase distortion is responsible for refractive blurring images accounting to loss spatial resolution power ground-based telescopes. The technology widely used remove this adaptive optics (AO). In AO, an estimate distorted provided by wavefront sensor (WFS) form low-resolution slope measurements then create corrected that (approximately) removes incoming wavefronts. Phase reconstruction WFS done solving large linear systems, followed interpolating its desired high resolution. paper, we propose alternate technique using concepts derived microcanonical multiscale formalism, which specific approach multifractality. We take into account priori information phase, multifractal exponents. Then, through framework multiresolution analysis and wavelet transform, address problem measurements. Comparison, terms quality, classical techniques AO proves superiority our approach.