Results 11 to 20 of about 2,674,389 (338)
Compressed wavefront sensing. [PDF]
Opt Lett, 2014 We report on an algorithm for fast wavefront sensing that incorporates sparse representation for the first time in practice. The partial derivatives of optical wavefronts were sampled sparsely with a Shack-Hartman wavefront sensor (SHWFS) by randomly subsampling the original SHWFS data to as little as 5%.
Polans J, McNabb RP, Izatt JA, Farsiu S.
europepmc +7 more sources
Shack–Hartmann Wavefront Sensing Based on Four-Quadrant Binary Phase Modulation [PDF]
Photonics, 2022 Aiming at the problem that it is difficult for the conventional Shack–Hartmann wavefront sensor to achieve high-precision wavefront reconstruction with low spatial sampling, a kind of Shack–Hartmann wavefront sensing technology based on four-quadrant ...
Mengmeng Zhao +7 more
doaj +3 more sources
Deep learning wavefront sensing
Optics Express, 2019 We present a new class of wavefront sensors by extending their design space based on machine learning. This approach simplifies both the optical hardware and image processing in wavefront sensing. We experimentally demonstrated a variety of image-based wavefront sensing architectures that can directly estimate Zernike coefficients of aberrated ...
Yohei Nishizaki +6 more
semanticscholar +5 more sources
Fast High-Resolution Phase Diversity Wavefront Sensing with L-BFGS Algorithm [PDF]
Sensors, 2023 The presence of manufacture error in large mirrors introduces high-order aberrations, which can severely influence the intensity distribution of point spread function.
Haoyuan Zhang +6 more
doaj +2 more sources
Angle-based wavefront sensing enabled by the near fields of flat optics. [PDF]
Nat Commun, 2021 There is a long history of using angle sensors to measure wavefront. The best example is the Shack-Hartmann sensor. Compared to other methods of wavefront sensing, angle-based approach is more broadly used in industrial applications and scientific ...
Yi S +5 more
europepmc +2 more sources
Research on Optical Metrology for Complex Optical Surfaces with Focal Plane Wavefront Sensing [PDF]
Micromachines, 2023 Complex optical elements have the advantages of improving image quality and optical performance and expanding the field of view. Therefore, it is widely used in X-ray scientific devices, adaptive optical elements, high-energy laser systems, and other ...
Xinxue Ma +4 more
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Advancing wavefront sensing: meta Shack-Hartmann sensor enhances phase imaging. [PDF]
Light Sci ApplA meta-lens array-based Shack-Hartmann wavefront sensor has been developed to break the limits imposed by the size and curvature of traditional micro-lenses, which significantly improves both sampling density and angular resolution of phase measurement ...
Liu X, Geng Z, Chen MK.
europepmc +2 more sources
Hyperspectral compressive wavefront sensing
High Power Laser Science and Engineering, 2023 Presented is a novel way to combine snapshot compressive imaging and lateral shearing interferometry in order to capture the spatio-spectral phase of an ultrashort laser pulse in a single shot.
Sunny Howard +4 more
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Direct wavefront sensing enables functional imaging of infragranular axons and spines. [PDF]
Nat Methods, 2019 Liu R, Li Z, Marvin JS, Kleinfeld D.
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Enhanced Neural Architecture for Real-Time Deep Learning Wavefront Sensing [PDF]
SensorsTo achieve real-time deep learning wavefront sensing (DLWFS) of dynamic random wavefront distortions induced by atmospheric turbulence, this study proposes an enhanced wavefront sensing neural network (WFSNet) based on convolutional neural networks (CNN).
Jianyi Li +4 more
doaj +2 more sources