Point spread function reconstruction for single-conjugate adaptive optics on extremely large telescopes

R Wagner, C Hofer, R Ramlau - Journal of Astronomical …, 2018 - spiedigitallibrary.org
Modern ground-based telescopes like the planned extremely large telescope (ELT) depend
heavily on adaptive optics (AO) systems to correct for atmospheric turbulence. Even though …

PhaseNet: A Deep Learning Based Phase Reconstruction Method for Ground-Based Astronomy

D Zheng, S Tang, R Wagner, R Ramlau, C Bao… - SIAM Journal on Imaging …, 2024 - SIAM
Ground-based astronomy utilizes modern telescopes to obtain information on the universe
by analyzing recorded signals. Due to atmospheric turbulence, the reconstruction process …

Generalized variational framework with minimax optimization for parametric blind deconvolution

Q Cao, D Han, X Wang, W Zhang - Inverse Problems, 2024 - iopscience.iop.org
Blind deconvolution (BD), which aims to separate unknown convolved signals, is a
fundamental problem in signal processing. Due to the ill-posedness and underdetermination …

Space-variant point spread function measurement and interpolation at any depth based on single-pixel imaging

H Jiang, Y Wang, X Li, H Zhao, Y Li - Optics Express, 2020 - opg.optica.org
Point spread function (PSF) is important for evaluating an optical system and image
deblurring. In this paper, we proposed a method to measure space-variant PSF at any depth …

Real-time image restoration for space-object imaging

JD Schmidt, K Jackovitz, JT Riley, JA Tellez - Applied Optics, 2019 - opg.optica.org
Military applications such as optical space surveillance and civilian applications such as
astronomical imaging often require adaptive optics to compensate images of distant objects …

A phase model for point spread function estimation in ground-based astronomy

RH Chan, XM Yuan, WX Zhang - Science China Mathematics, 2013 - Springer
In ground-based astronomy, images of objects in outer space are acquired via ground-
based telescopes. However, the imaging system is generally interfered by atmospheric …

High-resolution wavefront reconstruction using multiframe Shack–Hartmann wavefront sensor measurements

Z Ren, J Liu, Z Zhang, Z Chen, Y Liang - Optical Engineering, 2020 - spiedigitallibrary.org
High-resolution imaging with large ground-based telescopes is limited by atmospheric
turbulence. The observed images are usually blurred with unknown point spread functions …

Fast calculation of the line-spread-function by transversal directions decoupling

J Parravicini, L Tartara, E Hasani, A Tomaselli - Journal of Optics, 2016 - iopscience.iop.org
We propose a simplified method to calculate the optical spread function of a paradigmatic
system constituted by a pupil-lens with a line-shaped illumination ('line-spread-function') …

Sequential deconvolution from wave-front sensing using bivariate simplex splines

S Guo, R Zhang, J Li, J Zou, R Xu, C Liu - Optics Communications, 2015 - Elsevier
Deconvolution from wave-front sensing (DWFS) is an imaging compensation technique for
turbulence degraded images based on simultaneous recording of short exposure images …

Reconstruction of the high resolution phase in a closed loop adaptive optics system

R Ke, R Wagner, R Ramlau, R Chan - SIAM Journal on Imaging Sciences, 2020 - SIAM
Adaptive optics is a commonly used technique to correct the phase distortions caused by the
Earth's atmosphere to improve the image quality of the ground-based imaging systems …