Results 211 to 220 of about 887,904 (256)

Wavefront reconstruction error of Shack-Hartmann wavefront sensors

Publications of the Astronomical Society of the Pacific, 1994
We have evaluated the wavefront reconstruction error for Shack-Hartmann wavefront sensors based on a series of simulations for various numbers of subapertures at various levels of measurement error in determining the Hartmann spot centroids. The optimum number of subapertures is derived for a given magnitude reference star in the cases of photon-noise ...
N. Takato, M. Iye, I. Yamaguchi
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Geometric-optical reconstruction of a wavefront

SPIE Proceedings, 1999
A new method of achromatic wavefront reconstruction by geometric-optical reflection of the reconstructing radiation from surfaces with constant phase difference between the object and reference waves is theoretically described and experimentally realized. Method's distinction from holographic one is discussed.
Sergey V. Chekalin, Dmitry A. Dement'ev, Arkadi I. Ivanov, Yu. A. Matveets, Oleg B. Serov, Anatoly M. Smolovich, Andrei G. Stepanov   +6 more
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A Study of Wavefront Reconstruction Methods

Adaptive Optics, 1995
The accurate estimation of atmospherically distorted wavefronts is vital to both adaptive optics systems, and statistical deconvolution methods for image enhancement, as this places an absolute limit on the achievable resolution. Thus a clear understanding of the factors affecting the accuracy of wavefront estimation is essential.
D.L. Ash, C.J. Solomon
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Wavefront Reconstruction Methods

Journal of Refractive Surgery, 2009
Douglas D, Koch, Li, Wang, Dimitri A, Chernyak   +2 more
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Zonal wavefront reconstruction with multidirectional difference wavefronts for multilateral shearing interferometers

Applied Optics
Wavefront reconstruction is a key step in multilateral shearing interferometers, directly influencing measurement accuracy. Conventional zonal reconstruction methods typically use only two orthogonal difference wavefronts, which limits measurement accuracy.
Hui, Zhong, Yanqiu, Li, Ke, Liu, Xiting, Han, Tao, Wang, Zhe, Zhao   +5 more
openaire   +2 more sources

Shearing Interferometry by Wavefront Reconstruction

Journal of the Optical Society of America, 1968
Lately, practical applications for holographic techniques have been found in interferometry. These techniques are usefully applied to shearing interferometry. Different kinds of shear are treated, and in several cases the optical system is significantly simplified, compared to the corresponding conventional setups.
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Three-Dimensional Wavefront Reconstruction

Applied Optics, 1963
Wavefront reconstruction is a process by which a diffraction pattern can be restored into an image of the primary scatterer This process is being used to visualize the molecular structure of matter. Three-dimensional reconstruction is possible by means of a synthesizer which has two optic axes.
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Iterative wavefront reconstruction for strong turbulence using Shack–Hartmann wavefront sensor measurements

Journal of the Optical Society of America A: Optics and Image Science, and Vision, 2021
Jae Jun Kim, Brij Agrawal
exaly  

Hybrid wavefront reconstruction from multi-directional slope and full curvature measurements using integral equations with higher-order truncation errors for wavefront sensors

Optics and Lasers in Engineering, 2022
Yanqiu Li
exaly  

The Principle of Wavefront Reconstruction, 1948

1972
24 years ago, in 1947, I was very interested in improving the electron microscope. The electrons used in microscopy have wavelengths of the order of 0.05 Angstroms, hence one might have thought that they not only allow us to see atoms, but even explore their details.
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