Showing 861 - 880 results of 918 for search '"adaptive optics"', query time: 0.23s Refine Results
  1. 861

    Near-infrared Flux Distribution of Sgr A* from 2005–2022: Evidence for an Enhanced Accretion Episode in 2019 by Grant C. Weldon, Tuan Do, Gunther Witzel, Andrea M. Ghez, Abhimat K. Gautam, Eric E. Becklin, Mark R. Morris, Gregory D. Martinez, Shoko Sakai, Jessica R. Lu, Keith Matthews, Matthew W. Hosek Jr., Zoë Haggard

    Published 2023-01-01
    “…We present light curves from 69 observation epochs using the NIRC2 imager at 2.12 μ m with laser-guide star adaptive optics. These observations reveal that the mean luminosity of Sgr A* increased by a factor of ∼3 in 2019, and the 2019 light curves had higher variance than in all time periods we examined. …”
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    Article
  2. 862

    The Giant Accreting Protoplanet Survey (GAPlanetS): Optimization Techniques for Robust Detections of Protoplanets by Jéa I. Adams Redai, Katherine B. Follette, Jason Wang, Clare Leonard, William Balmer, Laird M. Close, Beck Dacus, Jared R. Males, Katie M. Morzinski, Joseph Palmo, Laurent Pueyo, Elijah Spiro, Helena Treiber, Kimberly Ward-Duong, Alex Watson

    Published 2023-01-01
    “…In this work, we present a new, systematic approach to optimization vetted using data of the high-contrast stellar companion HD 142527 B from the Magellan Adaptive Optics Giant Accreting Protoplanet Survey (GAPlanetS). …”
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    Article
  3. 863

    Microvascular Structural Alterations in Cancer Patients Treated With Antiangiogenic Drugs by Maria Antonietta Coschignano, Carolina De Ciuceis, Carolina De Ciuceis, Claudia Agabiti-Rosei, Claudia Agabiti-Rosei, Valeria Brami, Claudia Rossini, Giulia Chiarini, Paolo Malerba, Francesca Famà, Deborah Cosentini, Maria Lorenza Muiesan, Maria Lorenza Muiesan, Massimo Salvetti, Massimo Salvetti, Alina Petelca, Sara Capellini, Chiara Arnoldi, Matteo Nardin, Salvatore Grisanti, Damiano Rizzoni, Damiano Rizzoni, Alfredo Berruti, Anna Paini

    Published 2021-03-01
    “…Basal and total capillary density were assessed by capillaroscopy whereas, retinal arteriole morphology was measured by Adaptive Optics. Patients were evaluated before starting the antiangiogenic therapy (T0) and re-evaluated after 3 (T3) and 6 (T6) months after treatment. …”
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    Article
  4. 864

    Graphene Channel Electron-Multiplying Charge-Coupled Pixel by Munir Ali, Afshan Khaliq, Muhammad Abid Anwar, Jianhang Lv, Muhammad Malik, Tian Feng, Srikrishna Chanakya Bodepudi, Hongwei Guo, Khurram Shehzad, Zongwen Li, Yunfan Dong, Wei Liu, Huan Hu, Yuda Zhao, Bin Yu, Yang Xu

    Published 2023-01-01
    “…The presented technique paves the way for futuristic sinusoidally-driven graphene-silicon-based electron-multiplying CCDs with low-power surveillance and adaptive optics applications.…”
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    Article
  5. 865

    The retinal mosaic, eye movements and colour vision by Regan, SE

    Published 2020
    “…</p> <p>Until recently, information about the human cone mosaic could only come from histology, but the introduction of adaptive optics (AO) technology to retinal imaging has revolutionised our ability to investigate living, seeing human retinae at high resolution. …”
    Thesis
  6. 866

    JWST Observations of the Enigmatic Y-Dwarf WISE 1828+2650. I. Limits to a Binary Companion by Matthew De Furio, Ben Lew, Charles Beichman, Thomas Roellig, Geoffrey Bryden, David Ciardi, Michael Meyer, Marcia Rieke, Alexandra Greenbaum, Jarron Leisenring, Jorge Llop-Sayson, Marie Ygouf, Loic Albert, Martha Boyer, Daniel Eisenstein, Klaus Hodapp, Scott Horner, Doug Johnstone, Doug Kelly, Karl Misselt, George Rieke, John Stansberry, Erick Young

    Published 2023-01-01
    “…This article describes JWST/NIRCam observations of WISE 1828+2650 in six filters to address the binarity question and to provide new photometry to be used in model fitting. We also report adaptive optics imaging with the Keck I0 m telescope. …”
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    Article
  7. 867

    The Giant Accreting Protoplanet Survey (GAPlanetS)—Results from a 6 yr Campaign to Image Accreting Protoplanets by Katherine B. Follette, Laird M. Close, Jared R. Males, Kimberly Ward-Duong, William O. Balmer, Jéa Adams Redai, Julio Morales, Catherine Sarosi, Beck Dacus, Robert J. De Rosa, Fernando Garcia Toro, Clare Leonard, Bruce Macintosh, Katie M. Morzinski, Wyatt Mullen, Joseph Palmo, Raymond Nzaba Saitoti, Elijah Spiro, Helena Treiber, Kevin Wagner, Jason Wang, David Wang, Alex Watson, Alycia J. Weinberger

    Published 2023-01-01
    “…We report results from the Giant Accreting Protoplanet Survey (GAPlanetS), which collected H α differential imagery of 14 transitional disk host stars with the Magellan Adaptive Optics System. To address the twin challenges of morphological complexity and point-spread function instability, GAPlanetS required novel approaches for frame selection and optimization of the Karhounen–Loéve Image Processing algorithm pyKLIP . …”
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    Article
  8. 868

    Extending depth range of optical coherence tomography by Li, Jinhan

    Published 2020
    “…For hardware approaches, such as wavefront modification and adaptive optics, the rise in system complexity is always a problem. …”
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    Thesis-Doctor of Philosophy
  9. 869

    Structural and Functional Changes in Non-Paraneoplastic Autoimmune Retinopathy by Amir Akhavanrezayat, Anadi Khatri, Neil Gregory L. Onghanseng, Muhammad Sohail Halim, Christopher Or, Nripun Sredar, Moataz Razeen, Murat Hasanreisoglu, Jonathan Regenold, Zheng Xian Thng, S. Saeed Mohammadi, Tanya Jain, Negin Yavari, Vahid Bazojoo, Ankur Sudhir Gupta, Azadeh Mobasserian, Cigdem Yasar, Ngoc Trong Tuong Than, Gunay Uludag Kirimli, Irmak Karaca, Yong-Un Shin, Woong-Sun Yoo, Hashem Ghoraba, Diana V. Do, Alfredo Dubra, Quan Dong Nguyen

    Published 2023-11-01
    “…Multiple diagnostic modalities such as wide-angle fundus photography (WAFP), WA fundus autofluorescence (WAFAF), spectral-domain optical coherence tomography (SD-OCT), Goldmann visual field (GVF) perimetry, microperimetry (MP), electrophysiologic testing, and adaptive optics scanning laser ophthalmoscopy (AOSLO) were reviewed and analyzed. …”
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    Article
  10. 870

    Separated Twins or Just Siblings? A Multiplanet System around an M Dwarf Including a Cool Sub-Neptune by Mallory Harris, Diana Dragomir, Ismael Mireles, Karen A. Collins, Solène Ulmer-Moll, Steve B. Howell, Keivan G. Stassun, George Zhou, Carl Ziegler, François Bouchy, César Briceño, David Charbonneau, Kevin I. Collins, Gábor Fűűrész, Natalia M. Guerrero, Jon M. Jenkins, Eric L. N. Jensen, Martti H. K. Kristiansen, Nicholas Law, Monika Lendl, Andrew W. Mann, Hugh P. Osborn, Samuel N. Quinn, George R. Ricker, Richard P. Schwarz, Sara Seager, Eric B. Ting, Roland Vanderspek, David Watanabe, Joshua N. Winn

    Published 2023-01-01
    “…Reconnaissance radial velocity measurements (taken with EULER/CORALIE and SMARTS/CHIRON) and high-resolution speckle imaging with adaptive optics (obtained from SOAR/HRCAM and Gemini South/ZORRO) show no evidence of an eclipsing binary or a nearby companion, which, together with the low false-positive probabilities calculated with the statistical validation software TRICERATOPS, establishes the planetary nature of these candidates. …”
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    Article
  11. 871
  12. 872
  13. 873

    Adaptive harmonic generation microscopy of mammalian embryos. by Jesacher, A, Thayil, A, Grieve, K, Débarre, D, Watanabe, T, Wilson, T, Srinivas, S, Booth, M

    Published 2009
    “…Adaptive optics is implemented in a harmonic generation microscope using a wavefront sensorless correction scheme. …”
    Journal article
  14. 874

    Smart lighting system with tunable radiation pattern by Cerpentier Jeroen, Rondelez Nick, Slembrouck Nathan, Meuret Youri

    Published 2023-01-01
    “…Such functionality can be achieved with adaptive optical systems, which consist of one or multiple adjustable components, enabling illumination with a variable radiation pattern. …”
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    Article
  15. 875

    Impact of Pupil Aberrations on Wavefront Manipulation by Nobis Thomas

    Published 2021-01-01
    “…A systematic and quantitative analysis is given of the impact of pupil aberrations on the imaging performance in wavefront manipulation applications using adaptive optical elements. For the practical case of rotationally-symmetric types of wavefront corrections, such as defocus or spherical aberration, analytical expressions of the induced aberrations are derived including their pupil and field dependence. …”
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    Article
  16. 876

    Rapid Detection of Benzo[a]pyrene in Extra Virgin Olive Oil Using Fluorescence Spectroscopy by Emmanouil Orfanakis, Aggeliki Koumentaki, Aikaterini Zoumi, Aggelos Philippidis, Peter C. Samartzis, Michalis Velegrakis

    Published 2023-05-01
    “…This work aims to detect benzo[a]pyrene residues in EVOO using an easily adaptive optical methodology. This approach, which is based on fluorescence spectroscopy, does not require any sample pretreatment or prior extraction of PAH content from the sample, and is reported for the first time herein. …”
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    Article
  17. 877

    UV Durable LCOS for Laser Processing by Yasuki Sakurai, Masashi Nishitateno, Masahiro Ito, Kohki Takatoh

    Published 2021-08-01
    “…Liquid-Crystal-On-Silicon (LCOS) Spatial Light Modulator (SLM) is widely used as a programmable adaptive optical element in many laser processing applications with various wavelength light sources. …”
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    Article
  18. 878

    Component-wise testing of laser written integrated coupled mode beam splitters by Guan, J, Menssen, A, Liu, X, Wang, J, Booth, M

    Published 2019
    “…The method is based on the imaging of an individual IBS with a custom-built multifunctional adaptive optical microscope, combined with the calculation of its beam-splitting ratio through numerical modelling.…”
    Journal article
  19. 879

    A Novel Optical Vector Spectral Analysis Technique Employing a Limited-Bandwidth Detector by Madsen CK

    Published 2005-01-01
    “…This technique has application to optical monitoring of intersymbol interference distortions, including chromatic and polarization-mode dispersion effects, and thus can provide vector information for input to the control of adaptive optical filters. A method for generating a test signal spanning the spectrum of a modulated data signal without introducing intersymbol interference is discussed. …”
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    Article
  20. 880

    Wavefront control in adaptive microscopy using Shack-Hartmann sensors with arbitrarily shaped pupils by Dong, B, Booth, M

    Published 2018
    “…In adaptive optical microscopy of thick biological tissue, strong scattering and aberrations can change the effective pupil shape by rendering some Shack-Hartmann spots unusable. …”
    Journal article