Results 81 to 90 of about 82,082 (268)
Wavefront sensor and wavefront corrector matching in adaptive optics
Optics Express, 2007 Matching wavefront correctors and wavefront sensors by minimizing the condition number and mean wavefront variance is proposed. The particular cases of two continuous-sheet deformable mirrors and a Shack-Hartmann wavefront sensor with square packing geometry are studied in the presence of photon noise, background noise and electronics noise.
openaire +3 more sources
DNN-based aberration correction in a wavefront sensorless adaptive optics system.
Optics Express, 2019 Existing wavefront sensorless (WFS-less) adaptive optics (AO) generally require a search algorithm that takes lots of iterations and measurements to get optimal results. So the latency is a serious problem in the current WFS-less AO system, especially in
Qinghua Tian +8 more
semanticscholar +1 more source
The Individual Virtual Eye: a Computer Model for Advanced Intraocular Lens Calculation
Journal of Optometry, 2009 Purpose: To describe the individual virtual eye, a computer model of a human eye with respect to its optical properties. It is based on measurements of an individual person and one of its major application is calculating intraocular lenses (IOLs) for ...
Jens Einighammer +3 more
doaj +1 more source
Filtered Influence Function of Deformable Mirror for Wavefront Correction in Laser Systems
Photonics, 2021 An influence function filtering method (IFFM) is presented to improve the wavefront correction capability in laser systems by curbing the correction performance degradation resulted from the IF measurement noise.
Yamin Zheng +5 more
doaj +1 more source
Generating Artificial Reference Images for Open Loop Correlation Wavefront Sensors [PDF]
, 2018 Shack-Hartmann wavefront sensors for both solar and laser guide star adaptive optics (with elongated spots) need to observe extended objects. Correlation techniques have been successfully employed to measure the wavefront gradient in solar adaptive optics systems and have been proposed for laser guide star systems.
arxiv +1 more source
OftalʹmologiâPurpose: to assess the state of the wavefront in children with myopia, who have various manifestations of digital eye strain and symptoms of ocular surface disorders, and to evaluate the diagnostic significance of wavefront criteria for assessing the ...
I. L. Plisov +2 more
doaj +1 more source
Replay as wavefronts and theta sequences as bump oscillations in a grid cell attractor network
eLife, 2019 Grid cells fire in sequences that represent rapid trajectories in space. During locomotion, theta sequences encode sweeps in position starting slightly behind the animal and ending ahead of it. During quiescence and slow wave sleep, bouts of synchronized
Louis Kang, Michael R DeWeese
doaj +1 more source
Clinical Ophthalmology, 2020 Hesham Mohamed Gharieb,1,2 Hisham Samy Shalaby,3 Ihab Saad Othman4,5 1Faculty of Medicine, Ain Shams University, Cairo, Egypt; 2Research and Development, Eye World Hospital, Giza, Egypt; 3Department of Ophthalmology, Faculty of Medicine, Ain Shams ...
Gharieb HM, Shalaby HS, Othman IS
doaj
Noise-tolerant wavefront shaping in a Hadamard basis [PDF]
arXiv, 2021 Light scattering is the main limitation for optical imaging. However, light can be focused through or inside turbid media by spatially shaping the incident wavefront. Wavefront shaping is ultimately limited by the available photon budget. We developed a new `dual reference' wavefront shaping algorithm that optimally uses the available light. Our method
arxiv
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
doaj +1 more source