Results 21 to 30 of about 2,467 (209)

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
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, Sergey V. Karpeev, Alexey P. Porfirev   +2 more
doaj   +1 more source

A Review on Zernike Coefficient-Solving Algorithms (CSAs) Used for Integrated Optomechanical Analysis (IOA)

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, Yue Pan, Ning Zhang, Xiping Xu   +3 more
doaj   +1 more source

Zernike by ONE Pascal triangle [PDF]

EPJ Web of Conferences
This 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
doaj   +1 more source

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., Moreno V., Rabuñal Juan Ramón, Pazos Alejandro, Canabal Carbia Monica   +4 more
doaj   +1 more source

Zernike expansions of derivatives and Laplacians of the Zernike circle polynomials [PDF]

, 2014
The partial derivatives and Laplacians of the Zernike circle polynomials occur in various places in the literature on computational optics. In a number of cases, the expansion of these derivatives and Laplacians in the circle polynomials are required. For the first-order partial derivatives, analytic results are scattered in the literature, starting as
Janssen, A.J.E.M., Janssen, AJEM Guido
core   +3 more sources

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, Kim Cuc Thi Nguyen, Binh X. Cao, Van-Thuc Tran, Tiendung Vu, Ngoc-Tam Bui   +5 more
doaj   +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, Godfrey Andrew, Stimpson Shane, Collins Benjamin   +3 more
doaj   +1 more source

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

Zernike polynomials for photometric characterization of LEDs [PDF]

Journal of Optics, 2016
Kuala Lumpur, Malaysia, 23-26 April ...
Velázquez, J.L., Ferrero, Alejandro, Pons Aglio, Alicia, Campos Acosta, Joaquín, Hernanz, María Luisa   +4 more
openaire   +3 more sources