Showing 761 - 780 results of 918 for search '"adaptive optics"', query time: 2.36s Refine Results
  1. 761

    Mercury intoxication and ophthalmic involvement: An update review by Cristian de los Santos, J. Carlos Pastor, J. Carlos Pastor, Margarita Calonge, Margarita Calonge, Margarita Calonge

    Published 2023-03-01
    “…Despite the use of some imaging techniques such as in vivo confocal microscopy of the cornea, optical coherence tomography (OCT) of the retina and optic nerve, and functional tests such as electroretinography has helped to solve in part this debate, further studies incorporating other imaging modalities such as autofluorescence, OCT angiography or adaptive optics retinal imaging are needed. This review aims to summarize the published structural and functional alterations found in the visual system of patients suffering from mercury intoxication.…”
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    Article
  2. 762
  3. 763

    The Mass of the Black Hole in NGC 5273 from Stellar Dynamical Modeling by Katie A. Merrell, Eugene Vasiliev, Misty C. Bentz, Monica Valluri, Christopher A. Onken

    Published 2023-01-01
    “…Due to the proximity of the galaxy at 16.6 ± 2.1 Mpc, we were able to resolve and extract the bulk motions of stars near the central black hole using adaptive-optics-assisted observations with the Gemini Near-infrared Integral Field Spectrograph, as well as constrain the large-scale kinematics using archival Spectroscopic Areal Unit for Research and Optical Nebulae spectroscopy. …”
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    Article
  4. 764

    Active Damping, Vibration Isolation, and Shape Control of Space Structures: A Tutorial by André Preumont

    Published 2023-03-01
    “…The third part of the lecture summarizes more recent work done on the control of flexible mirrors: (i) flat mirrors for adaptive optics (AO) controlled by an array of piezoelectric ceramic (PZT) actuators and (ii) spherical thin shell polymer reflectors controlled by an array of piezoelectric polymer actuators (PVDF-TrFE) aimed at being deployed in space.…”
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    Article
  5. 765

    Data on the involvement of endothelin-1 (ET-1) in the dysregulation of retinal veins by Teruyo Kida, Josef Flammer, Hidehiro Oku, Katarzyna Konieczka, Seita Morishita, Taeko Horie, Tsunehiko Ikeda

    Published 2018-12-01
    “…Paques et al. [1] found venous nicking without arteriovenous contact using adaptive optics imaging. Thus, we investigated the potential role of a dysregulation of the retinal vein.While the pathogenesis of retinal vein occlusion (RVO) is still unclear, systemic hypertension and increased level of endothelin-1 (ET-1) are known risk factors (Flammer and Konieczka, 2015) [2]. …”
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    Article
  6. 766

    Orbital angular momentum and beyond in free-space optical communications by Wang Jian, Liu Jun, Li Shuhui, Zhao Yifan, Du Jing, Zhu Long

    Published 2021-12-01
    “…The fundamentals of OAM, concept of optical communications using OAM, OAM modulation (OAM modulation based on spatial light modulator, high-speed OAM modulation, spatial array modulation), OAM multiplexing (spectrally efficient, high capacity, long distance), OAM multicasting (adaptive multicasting, N-dimensional multicasting), OAM communications in turbulence (adaptive optics, digital signal processing, auto-alignment system), structured light communications beyond OAM (Bessel beams, Airy beams, vector beams), diverse and robust communications using OAM and beyond (multiple scenes, turbulence-resilient communications, intelligent communications) are comprehensively reviewed. …”
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    Article
  7. 767

    Live video rate volumetric OCT imaging of the retina with multi-MHz A-scan rates. by Jan Philip Kolb, Wolfgang Draxinger, Julian Klee, Tom Pfeiffer, Matthias Eibl, Thomas Klein, Wolfgang Wieser, Robert Huber

    Published 2019-01-01
    “…Applying advanced post processing concepts for numerical refocusing or computational adaptive optics should be possible in future with such a system.…”
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    Article
  8. 768

    In Vivo Changes in Lamina Cribrosa Microarchitecture and Optic Nerve Head Structure in Early Experimental Glaucoma. by Kevin M Ivers, Nripun Sredar, Nimesh B Patel, Lakshmi Rajagopalan, Hope M Queener, Michael D Twa, Ronald S Harwerth, Jason Porter

    Published 2015-01-01
    “…Mean ALCS pore area, elongation and nearest neighbor distance (NND) were quantified globally, in sectors and regionally from adaptive optics scanning laser ophthalmoscope images. …”
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    Article
  9. 769

    The Relationship Between Perifoveal L-Cone Isolating Visual Acuity and Cone Photoreceptor Spacing—Understanding the Transition Between Healthy Aging and Early AMD by Rigmor C. Baraas, Åshild Horjen, Stuart J. Gilson, Hilde R. Pedersen

    Published 2021-09-01
    “…Multimodal high-resolution retinal images were obtained with adaptive-optics scanning-light ophthalmoscopy (AOSLO), optical-coherence tomography (OCT), and color fundus photographs. …”
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    Article
  10. 770

    Design of high-speed phase-only spatial light modulators with two-dimensional tunable microcavity arrays by Peng, Cheng, Hamerly, Ryan M, Englund, Dirk R.

    Published 2021
    “…Spatial light modulators (SLMs) are central to numerous applications ranging from high-speed displays to adaptive optics, structured illumination microscopy, and holography. …”
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    Article
  11. 771

    On-Orbit Pointing Risk Mitigation for the Agile MicroSat (AMS) CubeSat Laser Guidestar Payload by Thieu, Albert

    Published 2022
    “…The AMS Beacon will be the first to provide an active lasing low Earth orbit reference for high-angle rate adaptive optics (AO). During the science phase of the mission, it will establish a space-to-ground link with an AO-equipped ground station. …”
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    Thesis
  12. 772

    Quantifying speckle noise in wavefront sensors for beam projection in weak turbulence by Allan, Gregory W, Allured, Ryan, Ashcom, Jonathan, Liu, Lulu, Cahoy, Kerri

    Published 2023
    “…<jats:p>Adaptive optics (AO) compensation for imaging or coherent illumination of a remote object relies on accurate sensing of atmospheric aberrations. …”
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    Article
  13. 773

    TOI-1749: an M dwarf with a Trio of Planets including a Near-resonant Pair by Seager, Sara

    Published 2023
    “…We have followed up this system from the ground by means of multiband transit photometry, adaptive optics imaging, and low-resolution spectroscopy, from which we have validated the planetary nature of the candidates. …”
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    Article
  14. 774

    Sensorless Wavefront Correction Algorithms for Free-Space Optical Communications by Čierny, Ondrej

    Published 2023
    “…Even in clear conditions, the effects of air turbulence along such links usually necessitate active wavefront correction via adaptive optics (AO). Conventional AO algorithms rely on direct wavefront sensing, an approach that is high in cost and SWaP and usually degrades in strong atmospheric scintillation. …”
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    Thesis
  15. 775

    Subtle Signatures of Multiplicity in Late-type Dwarf Spectra: The Unresolved M8.5 + T5 Binary 2MASS J03202839–0446358 by Burgasser, Adam J., Liu, Michael C., Ireland, Michael J., Cruz, Kelle L., Dupuy, Trent J.

    Published 2011
    “…Laser guide star adaptive optics (LGS AO) imaging observations, including the first application of LGS AO aperture mask interferometry, fail to resolve a faint companion, restricting the projected separation of the system to less than 8.3 AU at the time of observation. 2MASS J0320–0446 is the second very low mass binary to be identified from unresolved, low-resolution, near-infrared spectroscopy, a technique that complements traditional high-resolution imaging and spectroscopic methods.…”
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    Article
  16. 776

    A PRECISE PHYSICAL ORBIT FOR THE M-DWARF BINARY GLIESE 268 by Barry, Richard K., Forveille, Thierry, Danchi, W. C., Di Folco, E., Queloz, D., Spooner, H. R., Torres, G., Traub, W. A., Delfosse, Xavier, Mayor, Michel, Perrier, C., Udry, S., Demory, Brice-Olivier, Segransan, D.

    Published 2015
    “…These results are among the most precise masses measured for visual binaries and compete with the best adaptive optics and eclipsing binary results.…”
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    Article
  17. 777

    Bio inspired Magnet-polymer (Magpol) actuators by Ahmed, Anansa S., Ramanujan, R. V.

    Published 2014
    “…Applications of Magpol can include artificial muscles, drug delivery, adaptive optics and self healing structures. Advantages of Magpol include remote contactless actuation, high actuation strain and strain rate and quick response.…”
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    Conference Paper
  18. 778

    Smart lenses with electrically tuneable astigmatism by Ghilardi, Michele, Boys, Hugh, Török, Peter, Busfield, James J. C., Carpi, Federico

    Published 2020
    “…Results suggest that the possibility of electrically controlling aberrations inherent to these smart lenses holds promise to develop highly versatile new components for adaptive optics.…”
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    Journal Article
  19. 779

    Reconfigurable ultraviolet and high-energy visible dielectric metamaterials by Gholipour, Behrad, Piccinotti, Davide, Karvounis, Artemios, MacDonald, Kevin F., Zheludev, Nikolay I.

    Published 2020
    “…Photonic materials with tunable and switchable ultraviolet (UV) to high-energy visible (HEV) optical properties may benefit applications such as sensing, high-density optical memory, beam-steering, adaptive optics, and light modulation. Here, for the first time we demonstrate a nonvolatile switchable dielectric metamaterial operating in the UV-HEV spectral range. …”
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    Journal Article
  20. 780

    Latitudinal variation of methane mole fraction above clouds in Neptune's atmosphere from VLT/MUSE-NFM: limb-darkening reanalysis by Irwin, PGJ, Dobinson, J, James, A, Toledo, D, Teanby, NA, Fletcher, LN, Orton, GS, Pérez-Hoyos, S

    Published 2020
    “…We present a reanalysis of visible/near-infrared (480–930 nm) observations of Neptune, made in 2018 with the Multi Unit Spectroscopic Explorer (MUSE) instrument at the Very Large Telescope (VLT) in Narrow Field Adaptive Optics mode, reported by Irwin et al., Icarus, 311, 2019. …”
    Journal article