Results 131 to 140 of about 239,453 (286)
Wavefront Correction of Ionospherically Propagated HF Radio Waves Using Covariance Matching Techniques [PDF]
Radioengineering, 2017 High Frequency (HF) radio waves propagating in the ionospheric random inhomogeneous media exhibit a spatial nonlinearity wavefront which may limit the performance of conventional high-resolution methods for HF sky wave radar systems.
Y. Zhu, Y Wei, P. Tong
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The Correction of Eye Wavefront Using Contact Lenses and Their Impact on the Accommodative Response
Российский офтальмологический журнал, 2018 Eye wavefront aberrations have a strong impact on the formation of an image on the retina and vision quality. A relationship has also been found between the aberrations and accommodation, which plays a significant role in visual performance and ...
E. P. Tarutta +2 more
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High-Resolution Imaging in the Visible on Large Ground-Based Telescopes
, 2014 Lucky Imaging combined with a low order adaptive optics system has given the highest resolution images ever taken in the visible or near infrared of faint astronomical objects.
Crass, Jonathan +13 more
core +1 more source
Fast single pixel modal wavefront sensing using neural networks [PDF]
arXivDynamic wavefront aberrations negatively impact a wide range of optical applications including astronomy, optical free-space telecommunications and bio-imaging. Wavefront errors can be compensated by an adaptive optics system comprised of a deformable mirror and wavefront sensor connected by a control loop. For satellite optical communications (SatCom),
arxiv
SOWAT: Speckle Observations With Alleviated Turbulence
, 2019 Adaptive optics (AO) systems and image reconstruction algorithms are indispensable tools when it comes to high-precision astrometry. In this paper, we analyze the potential of combining both techniques, i.e.
Bosco, Felix +2 more
core +1 more source
Geophysical Prospecting, EarlyView.Abstract The knowledge of the local slope field of prestack seismic data is essential in several seismic signal processing tasks. Building on our previous slope‐assisted, physics‐informed seismic interpolation framework, dubbed PINNslope, we introduce a series of enhancements that elevate the framework's versatility.
Francesco Brandolin +2 more
wiley +1 more source
A new low-cost, compact, auto-phoropter for refractive assessment in developing countries
Scientific Reports, 2017 Using a phoropter to measure the refractive error is one of the most commonly used methods by ophthalmologists and optometrists. Here, we demonstrate design and fabrication of a portable automatic phoropter with no need for patient’s feedback. The system
Babak Amirsolaimani +4 more
doaj +1 more source
Journal of Optometry, 2017 Purpose: To evaluate the efficacy and safety of Corneal-Wavefront guided transepithelial photorefractive keratectomy (TransPRK) after corneal collagen cross linking (CXL) in keratoconic patients.
Massimo Camellin +2 more
doaj +1 more source
, 2009 One important frontier for astronomical adaptive optics (AO) involves methods such as Multi-Object AO and Multi-Conjugate AO that have the potential to give a significantly larger field of view than conventional AO techniques.
Ammons, S. Mark +6 more
core +1 more source
Clinical Ophthalmology, 2015 Steven C Schallhorn,1,2 Jan A Venter,2 Stephen J Hannan,2 Keith A Hettinger2 1University of California, San Francisco, CA, USA; 2Optical Express, Glasgow, UK Purpose: The purpose of this study was to evaluate the refractive and visual outcomes of ...
Schallhorn SC +3 more
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