Results 31 to 40 of about 2,024,523 (345)
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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Pyramid wavefront sensor optical gains compensation using a convolutional model [PDF]
Astronomy & Astrophysics, 2020 Context. Extremely large telescopes are overwhelmingly equipped with pyramid wavefront sensors (PyWFS) over the more widely used Shack–Hartmann wavefront sensor to perform their single-conjugate adaptive optics (SCAO) mode.
V. Chambouleyron +7 more
semanticscholar +1 more source
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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Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT We report on a tapered three-core optical fibre that can be used as a tip–tilt wavefront sensor. In this device, a coupled region of a few millimetres at the sensing tip of the fibre converts fragile phase information from an incoming wavefront into robust intensity information within each of the cores. The intensity information
Wright, Thomas A. +4 more
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Breaking of Wavelength-Dependence in Holographic Wavefront Sensors Using Spatial-Spectral Filtering
Sensors, 2023 Nowadays, wavefront sensors are widely used to control the shape of the wavefront and detect aberrations of the complex field amplitude in various fields of physics. However, almost all of the existing wavefront sensors work only with quasi-monochromatic
Nikita Stsepuro +3 more
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Applied Optics, 2021 The modal holographic wavefront sensor enables fast measurement of individual aberration modes without the need for time-consuming calculations. However, the measurement accuracy suffers greatly from intermodal crosstalk, caused when the wavefront ...
A. Zepp, S. Gladysz, K. Stein, W. Osten
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Surface Measurement Using Compressed Wavefront Sensing
Photonic Sensors, 2018 Compressed sensing leverages the sparsity of signals to reduce the amount of measurements required for its reconstruction. The Shack-Hartmann wavefront sensor meanwhile is a flexible sensor where its sensitivity and dynamic range can be adjusted based on
Eddy Mun Tik Chow +3 more
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Polarized Shack-Hartmann wavefront sensor
Frontiers in Physics, 2023 Shack-Hartmann wavefront sensor (SHWFS) has been widely used in adaptive optics (AO) systems to detect phase distortion characteristics. In laser communication, target detection, vision optics and other application fields, the performance of SHWFS is ...
Yanrong Yang +8 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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Wavefront sensor for millimeter/submillimeter-wave adaptive optics based on aperture-plane interferometry [PDF]
Astronomical Telescopes + Instrumentation, 2020 We present a concept of a millimeter wavefront sensor that allows real-time sensing of the surface of a groundbased millimeter/submillimeter telescope. It is becoming important for ground-based millimeter/submillimeter astronomy to make telescopes larger
Y. Tamura +22 more
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