Results 11 to 20 of about 5,505 (209)
Shack–Hartmann Wavefront Sensing Based on Four-Quadrant Binary Phase Modulation
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
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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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Testing and characterization of challenging optics and optical systems with Shack Hartmann wavefront sensors [PDF]
EPJ Web of Conferences, 2019 The Shack-Hartman wavefront sensor is a common metrology tool in the field of laser, adaptive optics and astronomy. However, this technique is still scarcely used in optics and optical system metrology.
Siv Julie +5 more
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Shack-Hartmann Wavefront Sensing of Ultrashort Optical Vortices
Sensors, 2021 Light beams carrying Orbital Angular Momentum (OAM), also known as optical vortices (OV), have led to fascinating new developments in fields ranging from quantum communication to novel light–matter interaction aspects. Even though several techniques have
Alok Kumar Pandey +4 more
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Angle-based wavefront sensing enabled by the near fields of flat optics
Nature Communications, 2021 Generally, wavefronts are measured using angle-based sensors like the Shack-Hartmann sensor. Here, the authors present an angle-sensitive device that uses flat optics integrated on a focal plane array for compact wavefront sensing with improved ...
Soongyu Yi +5 more
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One-Dimensional High-Resolution Wavefront Sensor Enabled by Subwavelength Compound Gratings
Photonics, 2023 Angle sensors are widely used for wavefront measurements, which is attributed to their integration and robustness. Currently, commercial sensors are available with pixel sizes in the order of wavelengths.
Yunlong Meng +6 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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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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Wavefront Derived Refraction and Full Eye Biometry in Pseudophakic Eyes. [PDF]
PLoS ONE, 2016 To assess wavefront derived refraction and full eye biometry including ciliary muscle dimension and full eye axial geometry in pseudophakic eyes using spectral domain OCT equipped with a Shack-Hartmann wavefront sensor.Twenty-eight adult subjects (32 ...
Xinjie Mao +6 more
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IEEE Photonics Journal, 2022 Correction performance of an adaptive optics (AO) system is severely limited by its system latency under high temporal frequency distortions. Wavefront prediction methods has been proven to be an effective way to compensate system delay.
Ning Wang +8 more
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