Results 41 to 50 of about 2,920,675 (338)
Annual Review of Vision Science, 2020 High-resolution retinal imaging is revolutionizing how scientists and clinicians study the retina on the cellular scale. Its exquisite sensitivity enables time-lapse optical biopsies that capture minute changes in the structure and physiological ...
Donald T. Miller, K. Kurokawa
semanticscholar +1 more source
Centroid-Predicted Deep Neural Network in Shack-Hartmann Sensors
IEEE Photonics Journal, 2022 The Shack-Hartmann wavefront sensor produces incorrect wavefront measurements when some sub-spots are weak and missing. In this paper, a method is proposed to predict the centroids of these sub-spots for the Shack-Hartmann wavefront sensor based on the ...
Mengmeng Zhao +6 more
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Adaptive optics with an infrared pyramid wavefront sensor at Keck
Journal of Astronomical Telescopes Instruments and Systems, 2020 . The study of cold or obscured, red astrophysical sources can significantly benefit from adaptive optics (AO) systems employing infrared (IR) wavefront sensors.
C. Bond +20 more
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Applied Sciences, 2023 Measuring the intensity and distribution of atmospheric optical turbulence at large-aperture astronomical telescope sites is crucial to optimizing turbulence correction for different layers.
Xian Ran +7 more
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Delhi Journal of Ophthalmology, 2015 Physicists and ophthalmologists, since time immemorial have aggressively tried to break new ground in trying to get a good look at the retina and its myriad pathologies. Although fundus photography, optical coherence tomography and fundus fluorescein angiography have largely been very successful in imaging the retina and give a clear understanding of ...
Apoorva Ayachit +6 more
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Optics Express, 2020 We theoretically investigate the effectiveness of adaptive optics correction for Gaussian beams affected by oceanic turbulence. Action of an idealized adaptive optics system is modeled as a perfect removal of a certain number of Zernike modes from the ...
I. Toselli, S. Gladysz
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The Extreme Learning Machine for the Extraction of Mono-Exponential Decay Time
IEEE Photonics Journal, 2023 The mono-exponential decay has been used to describe various physical phenomena such as cavity ring-down signal, fluorescence decay, etc. In this paper, a neural network method of extreme learning machine (ELM) is adopted to efficiently extract decay ...
Xing He +4 more
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Origin of cell contrast in offset aperture adaptive optics ophthalmoscopy.
Optics Letters, 2020 Offset aperture and split detector imaging are variants of adaptive optics scanning ophthalmoscopy recently introduced to improve the image contrast of retinal cells.
Andres Guevara-Torres +2 more
semanticscholar +1 more source
IEEE Photonics JournalStabilization of optical beams has always been a key factor affecting the performance of many optical systems. The Adaptive optics (AO) beam stabilization system requires further development to cope with increasingly complex application scenarios and ...
Sicheng Guo +6 more
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Optics Express, 2019 We present a new Point Diffraction Interferometer (PDI). Binary adaptive optics (BAO) and Quaternary Adaptive Optics (QAO) can be performed with the help of this PDI as a wavefront sensor. The PDI interferogram, once binarized, is used in two consecutive steps to produce a quaternary mask with phase values 0, π/2, π and 3π/2.
Manuel P. Cagigal +5 more
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