Results 11 to 20 of about 26,046 (295)
Adaptive Optics for Astronomy [PDF]
Annual Review of Astronomy and Astrophysics, 2012 Adaptive optics is a prime example of how progress in observational astronomy can be driven by technological developments. At many observatories it is now considered to be part of a standard instrumentation suite, enabling ground-based telescopes to reach the diffraction limit and, thus, providing spatial resolution superior to that achievable from ...
Markus Kasper, R. I. Davies
openaire +4 more sources
, 2020 This tutorial describes the principles and practical implementation of sensorless adaptive optics.
Hampson, Karen Mary +3 more
openaire +2 more sources
IEEE Photonics Journal, 2023 Atmospheric dispersion is a wavelength-dependent effect that affects astronomical observations performed using ground-based telescopes. The effect of atmospheric dispersion for a 4-meter telescope is analyzed and an atmospheric dispersion corrector (ADC)
Guoqing Gao +5 more
doaj +1 more source
No-Reference Quality Assessment of Extended Target Adaptive Optics Images Using Deep Neural Network
Sensors, 2023 This paper proposes a supervised deep neural network model for accomplishing highly efficient image quality assessment (IQA) for adaptive optics (AO) images.
Guoqing Gao +7 more
doaj +1 more source
Automated Adaptive Optics [PDF]
, 2021 Preprint of an article submitted for consideration in The WSPC Handbook of Astronomical Instrumentation http://www.worldscientific.com/worldscibooks/10.1142 ...
Baranec, Christoph +2 more
openaire +2 more sources
Adaptive optics in microscopy [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2007 The imaging properties of optical microscopes are often compromised by aberrations that reduce image resolution and contrast. Adaptive optics technology has been employed in various systems to correct these aberrations and restore performance. This has required various departures from the traditional adaptive optics schemes that are used in astronomy ...
openaire +4 more sources
IEEE Photonics Journal, 2021 Coherent beam combination of fiber laser phased array is a promising technique to achieve high-brightness laser output. In this paper, we focus on central-lobe energy enhancement of the combined beam in the far-field by theoretically and experimentally ...
Jing Zuo +11 more
doaj +1 more source
Adaptive optics for optical microscopy [Invited]
Biomedical Optics Express, 2023 Optical microscopy is widely used to visualize fine structures. When applied to bioimaging, its performance is often degraded by sample-induced aberrations. In recent years, adaptive optics (AO), originally developed to correct for atmosphere-associated aberrations, has been applied to a wide range of microscopy modalities, enabling high- or super ...
Zhang, Q +6 more
openaire +2 more sources
Precision astrometry with adaptive optics [PDF]
SPIE Proceedings, 2008 We investigate the limits of ground-based astrometry with adaptive optics using the core of the Galactic globular cluster M5. Adaptive optics systems provide near diffraction-limit imaging with the world's largest telescopes. The substantial improvement in both resolution and signal-to-noise ratio enables high-precision astrometry from the ground.
Cameron, P. B. +2 more
openaire +9 more sources
An Image-Based Alignment Errors Correction Method for Segmented Fresnel Primary Mirror
IEEE Photonics Journal, 2020 The alignment errors correction of segmented Fresnel primary mirror in multiple imaging scenes is simulated. Based on the linear relationship between five kinds of alignment errors and modulation transfer function metric or image frequency domain metric,
Licheng Zhu +5 more
doaj +1 more source