Results 221 to 230 of about 345,237 (255)
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Optics Letters, 2020
A dispersed fringe sensor (DFS) is a promising approach for sensing the large-scale piston error for segmented mirror systems. In this Letter, a novel method, to the best of our knowledge, for piston sensing based on a digital dispersed fringe (DDF ...
Yongfeng Zhang, H. Xian
semanticscholar +1 more source
A dispersed fringe sensor (DFS) is a promising approach for sensing the large-scale piston error for segmented mirror systems. In this Letter, a novel method, to the best of our knowledge, for piston sensing based on a digital dispersed fringe (DDF ...
Yongfeng Zhang, H. Xian
semanticscholar +1 more source
Optics Letters, 2019
In the cophasing of the segmented optical mirrors, the Shack-Hartmann wavefront sensor is not sensitive to the submirror piston error and the large range piston errors beyond the cophasing detection range of phase diversity algorithm.
Dequan Li, Shuyan Xu, Dong Wang, D. Yan
semanticscholar +1 more source
In the cophasing of the segmented optical mirrors, the Shack-Hartmann wavefront sensor is not sensitive to the submirror piston error and the large range piston errors beyond the cophasing detection range of phase diversity algorithm.
Dequan Li, Shuyan Xu, Dong Wang, D. Yan
semanticscholar +1 more source
Optics Express
The Inverse synthetic aperture ladar (ISAL) is an important technique for high resolution imaging at a long range. However, mitigating atmospheric turbulence effects remains a significant challenge in practical applications.
Azezigul Abdukirim +5 more
semanticscholar +1 more source
The Inverse synthetic aperture ladar (ISAL) is an important technique for high resolution imaging at a long range. However, mitigating atmospheric turbulence effects remains a significant challenge in practical applications.
Azezigul Abdukirim +5 more
semanticscholar +1 more source
Piston alignment of segmented optical mirrors via convolutional neural networks.
Optics Letters, 2018Most of the methods used today for the alignment of segmented mirrors are based on Shack-Hartman wavefront sensors. Other proposed methods are based on curvature sensors. These can be used to cross-check the measurements given by the primary method.
Dailos Guerra-Ramos +3 more
semanticscholar +1 more source
Applied Optics, 2020
Piston diagnosing approaches for segmented mirrors via machine-learning have shown great success. However, they are inevitably challenged with 2π ambiguity, and the accuracy is usually influenced by the location and number of submirrors.
Mei Hui +6 more
semanticscholar +1 more source
Piston diagnosing approaches for segmented mirrors via machine-learning have shown great success. However, they are inevitably challenged with 2π ambiguity, and the accuracy is usually influenced by the location and number of submirrors.
Mei Hui +6 more
semanticscholar +1 more source
Adaptive optics correction of scintillation in underwater medium
, 2020Adaptive optics correction of the scintillation index of a Gaussian laser beam in underwater turbulence is studied. To introduce the adaptive optics correction, filter functions providing the piston, tilt and astigmatism effects are adapted to promote ...
Y. Baykal
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Simultaneous piston and tip-tilt measurement of segmented optics with cross-fringe phasing sensor
, 2023 Seichi Sato, Tadahito Mizutani
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High-fill-factor adaptive optics mirrors with independent piston, tip and tilt controls
, 2006 Dennis S. Greywall
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