Results 21 to 30 of about 6,949 (194)
Photonics, 2023 An integrated optomechanical analysis (IOA) can predict the response of an optomechanical system to temperature, gravity, vibrations, and other local loadings; thus, the normal operation of instruments under special conditions is guaranteed.
Motong Hu +3 more
doaj +1 more source
Wavefront Aberration Sensor Based on a Multichannel Diffractive Optical Element
Sensors, 2020 We propose a new type of a wavefront aberration sensor, that is, a Zernike matched multichannel diffractive optical filter, which performs consistent filtering of phase distributions corresponding to Zernike polynomials. The sensitivity of the new sensor
Svetlana N. Khonina +2 more
doaj +1 more source
Post-coronagraphic tip-tilt sensing for vortex phase masks: the QACITS technique [PDF]
, 2015 Small inner working angle coronagraphs, like the vortex phase mask, are essential to exploit the full potential of ground-based telescopes in the context of exoplanet detection and characterization.
Absil, Olivier +3 more
core +4 more sources
Fringe Pattern Denoising using U-Net based neural network [PDF]
EPJ Web of Conferences, 2020 Fringe visibility and noise removal, are key success factors in interferometric techniques, where novel deep learning techniques can be applied. We test the use U-Net deep convolutional network applied to the obtained interference images, trained with an
Crespo J. M. +4 more
doaj +1 more source
Modeling low order aberrations in laser guide star adaptive optics systems [PDF]
, 2007 When using a laser guide star (LGS) adaptive optics (AO) system, quasi-static aberrations are observed between the measured wavefronts from the LGS wavefront sensor (WFS) and the natural guide star (NGS) WFS.
Bouchez, Antonin H. +2 more
core +1 more source
EFFECTS OF FUEL TEMPERATURE-SHAPING FUNCTIONS ON XENON OSCILLATIONS [PDF]
EPJ Web of Conferences, 2021 In coupled multiphysics simulations, single pin-averaged values are typically used to describe the temperature, power, and burnup within a given fuel pin.
Walker Erik +3 more
doaj +1 more source
Zernike by ONE Pascal triangle [PDF]
EPJ Web of ConferencesThis work discovers two hidden cases of blockwise recurrence in Zernike computations. Based on these findings, a new computation scheme for Zernike polynomials is proposed.
Chen Wei–Jun
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Modal Reconstruction Based on Arbitrary High-Order Zernike Polynomials for Deflectometry
Mathematics, 2023 Deflectometry is a non-destructive, full-field phase measuring method, which is usually used for inspecting optical specimens with special characteristics, such as highly reflective or specular surfaces, as well as free-form surfaces.
Duy-Thai Nguyen +5 more
doaj +1 more source
Comparative analysis of some modeal reconstruction methods of the cornea from corneal elevation data [PDF]
, 2009 Purpose. A comparative study of the ability of some modal schemes to reproduce corneal shapes of varying complexity is performed, using both standard radial polynomials and the radial basis functions (RBF).
Alió, Jorge L. +4 more
core +2 more sources
Using Generalized Basis for Functional Expansion
Journal of Nuclear Engineering, 2021 Functional expansion has been rigorously studied as a promising method in stochastic neutron transport and multi-physics coupling. It is a method to represent data specified on a desired domain as an expansion of basis set in a continuous manner.
Zhuoran Han, Benoit Forget, Kord Smith
doaj +1 more source