Results 171 to 180 of about 3,847 (222)

Jacobi circle and annular polynomials: modal wavefront reconstruction from wavefront gradient

Journal of the Optical Society of America A, 2018
Jacobi circle polynomials, which are orthogonal on the unit circle with orthogonal radial derivatives, have been developed previously. As the classical Zernike mode can be represented as a linear combination of Jacobi modes, Zernike wavefront modes can be reconstructed using Jacobi modes.
Wenhan, Sun, Shuai, Wang, Xing, He, Bing, Xu   +3 more
openaire   +2 more sources

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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Wavefront Reconstruction from incompletely sampled SH Wavefront Sensor Data

Imaging and Applied Optics, 2013
We present the application of a dynamic reconstructor which can be used when SH spots are not detected and investigate the wavefront fidelity for a number of different cases.
Douglas Miller, Torsten Leibold, Chris Biddick, Julian Christou, Andrew Rakich   +4 more
openaire   +1 more source

Wavefront reconstruction for the Shack-Hartmann wavefront sensor

SPIE Proceedings, 2002
The Shack-Hartmann wavefront sensor is a powerful tool for optical analysis. A vital step in the data analysis chain involves reconstructing the wavefront incident upon the lenslet array from hundreds or thousands of slope measurements. We discuss here the basics of reconstruction and the differences in reconstruction for the case of Hartmann and Shack-
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Reconstructed Wavefronts and Communication Theory*

Journal of the Optical Society of America, 1962
A two-step imaging process discovered by Gabor involves photographing the Fresnel diffraction pattern of an object and using this recorded pattern, called a hologram, to construct an image of this object. Here, the process is described from a communication-theory viewpoint.
Emmett N. Leith, Juris Upatnieks
openaire   +1 more source

Incoherent wavefront reconstruction by a retroemission device

Optics Letters, 2015
This Letter addresses wavefront reconstruction by a retroemission device (REM). REM represents a lenslet array mounted on a substrate made of photoluminescent optical material, such as a polymer film impregnated with upconversion nanoparticles. An excitation light wavefront incident on the REM was sampled by the lenslet array piece-wise.
Eugenyi V, Khaydukov, Vladimir A, Semchishen, Andrei V, Zvyagin   +2 more
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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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Wavefront Reconstruction Methods

Journal of Refractive Surgery, 2009
Douglas D, Koch, Li, Wang, Dimitri A, Chernyak   +2 more
openaire   +3 more sources

Film-Grain Noise in Wavefront-Reconstruction Imaging

Journal of the Optical Society of America, 1967
A fundamental limitation to the quality of wavefront reconstruction images is noise generated by the granular structure of the recording medium. Predictions of the signal-to-noise ratios that can be achieved in wavefront-reconstruction imaging are based on the checkerboard and overlapping circular-grain models of the recording medium.
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MULTICOLOR WAVEFRONT RECONSTRUCTION

Applied Physics Letters, 1965
K. S. Pennington, L. H. Lin
openaire   +1 more source