Results 11 to 20 of about 1,461 (175)
Revisiting PSF models: Unifying framework and high-performance implementation. [PDF]
J MicroscAbstract Localisation microscopy often relies on detailed models of point‐spread functions. For applications such as deconvolution or PSF engineering, accurate models for light propagation in imaging systems with a high numerical aperture are required. Different models have been proposed based on 2D Fourier transforms or 1D Bessel integrals.
Liu Y +7 more
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Stable Evaluation of 3D Zernike Moments for Surface Meshes
Algorithms, 2022 The 3D Zernike polynomials form an orthonormal basis of the unit ball. The associated 3D Zernike moments have been successfully applied for 3D shape recognition; they are popular in structural biology for comparing protein structures and properties. Many
Jérôme Houdayer, Patrice Koehl
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Accuracy and reliability of orthogonal polynomials in representing corneal topography
Medicine in Novel Technology and Devices, 2022 Fitting of corneal topography data to analytical surfaces has been necessary in many clinical and experimental applications, yet absolute superiority of fitting methods was still unclear, and their overfitting risks were not well studied.
Junjie Wang +9 more
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Simultaneous quantification of longitudinal and transverse ocular chromatic aberrations with Hartmann–Shack wavefront sensor [PDF]
Journal of Innovative Optical Health Sciences, 2018 A simple method to objectively and simultaneously measure eye’s longitudinal and transverse chromatic aberrations was proposed. A dual-wavelength wavefront measurement system using two Hartmann–Shack wavefront sensors was developed. The wavefronts of the
Yangchun Deng +3 more
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Reconstruction of wavefront distorted by atmospheric turbulence using a Shack-Hartman sensor [PDF]
Компьютерная оптика, 2019 The reconstruction of a wave front containing random phase distortions of the light field is considered. The reconstruction is performed by a Hartmann method based on the approximation of the wave function by Zernike polynomials using estimates of local ...
Vitaly Lavrinov, Lidiya Lavrinova
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Zernike integrated partial phase error reduction algorithm
Results in Optics, 2021 A modification to the error reduction algorithm is reported in this paper for determining the prescription of an imaging system in terms of Zernike polynomials.
Stephen C. Cain
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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
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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
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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
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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
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