Results 21 to 30 of about 2,243,893 (300)
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
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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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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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Denoising wavefront sensor image with deep neural networks [PDF]
, 2020 A classical closed-loop adaptive optics system with a Shack-Hartmann wavefront sensor (WFS) relies on a center of gravity approach to process the WFS information and an integrator with gain to produce the commands to a Deformable Mirror (DM) to ...
Damien Gratadour +7 more
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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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Journal of Astronomical Telescopes Instruments and Systems, 2021 . The Giant Segmented Mirror Telescopes (GSMTs) including the Giant Magellan Telescope (GMT), the Thirty Meter Telescope (TMT), and the European Extremely Large Telescope (E-ELT), all have extreme adaptive optics (ExAO) instruments planned that will use ...
L. Schatz +13 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. Gładysz, K. Stein, W. Osten
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Depth-Resolved Wavefront Aberrations using a Coherence-Gated Shack-Hartmann Wavefront Sensor [PDF]
, 2010 In the present paper we investigate the possibility of narrowing the depth range of a physical Shack - Hartmann (SH) wavefront sensor (WFS) by using coherence gating.
Tuohy, Simon, Podoleanu, Adrian G.H.
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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
Modeling classical wavefront sensors
Optics Express, 2020 We present an image formation model for deterministic phase retrieval in propagation-based wavefront sensing, unifying analysis for classical wavefront sensors such as Shack-Hartmann (slopes tracking) and curvature sensors (based on Transport-of-Intensity Equation).
Congli Wang +3 more
openaire +3 more sources