Results 31 to 40 of about 2,071,972 (337)
Photonics, 2023 Optical satellite communications (OSC) downlinks can support much higher bandwidths than radio-frequency channels. However, atmospheric turbulence degrades the optical beam wavefront, leading to reduced data transfer rates.
Payam Parvizi +4 more
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Reference-less complex wavefields characterization with a high-resolution wavefront sensor [PDF]
Applied Physics Letters, 2021 Wavefront sensing is a widely-used non-interferometric, single-shot, and quantitative technique providing the spatial-phase of a beam. The phase is obtained by integrating the measured wavefront gradient.
Tengfei Wu, P. Berto, M. Guillon
semanticscholar +1 more source
Detecting momentum weak value: Shack-Hartmann versus a weak measurement wavefront sensor. [PDF]
Optics Letters, 2021 The task of wavefront sensing is to measure the phase of the optical field. Here, we demonstrate that the widely used Shack-Hartmann wavefront sensor detects the weak value of transverse momentum, usually achieved by the method of quantum weak ...
Yi-Zhuang Zheng +5 more
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IEEE Photonics Journal, 2021 Wavefront reconstruction and correction under strong turbulence has become a crucial issue for adaptive optics systems. An approach using a plenoptic sensor has attracted high attention recently.
Jintian Hu +5 more
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COACH-based Shack-Hartmann wavefront sensor with an array of phase coded masks. [PDF]
Optics Express, 2021 Shack-Hartmann wavefront sensors (SHWS) are generally used to measure the wavefront shape of light beams. Measurement accuracy and the sensitivity of these sensors are important factors for better wavefront sensing.
Nitin Dubey, Ravi Kumar, Joseph Rosen
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Applied Sciences, 2023 In adaptive optics systems, the precision wavefront sensor determines the closed-loop correction effect. The accuracy of the wavefront sensor is severely reduced when light energy is weak, while the real-time performance of wavefront sensorless adaptive ...
Bo Chen +4 more
doaj +1 more source
Deep and clear optical imaging of thick inhomogeneous samples. [PDF]
PLoS ONE, 2012 Inhomogeneity in thick biological specimens results in poor imaging by light microscopy, which deteriorates as the focal plane moves deeper into the specimen.
Raphael Jorand +7 more
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CoolMomentum-SPGD Algorithm for Wavefront Sensor-Less Adaptive Optics Systems
Photonics, 2023 Instead of acquiring the previous aberrations of an optical wavefront with a sensor, wavefront sensor-less (WFSless) adaptive optics (AO) systems compensate for wavefront distortion by optimizing the performance metric directly.
Zhiguang Zhang +4 more
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Performance Characterization of Deep-Phase-Retrieval Shack-Hartmann Wavefront Sensors
IEEE Photonics Journal, 2023 Shack-Hartmann wavefront sensor (SHWFS) is the most popular wavefront sensor in adaptive optics systems. The Deep-Phase-Retrieval Wavefront Reconstruction (DPRWR) method, which was proposed by our group previously, is a kind of deep learning-based ...
Manting Zhang, Youming Guo
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Confusion in differential piston measurement with the pyramid wavefront sensor
Astronomy & Astrophysics, 2021 Context. The pyramid was proven to be a highly sensitive and versatile wave-front sensor (WFS) and has been selected to be installed on the single conjugate adaptive optics (AO) systems of the extremely large telescope (ELT).
A. Bertrou-Cantou +6 more
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