Results 341 to 350 of about 152,963 (375)

Wavefronts and reflection groups [PDF]

Russian Mathematical Surveys, 1988
The author surveys in detail a new method of classifying the typical singularities occurring in problems on wave front sets and reflection groups. This method builds on the study of generating families of functions for given systems of rays and makes it possible to classify all generic singularities in three-dimensional problems on envelopes of systems
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Applications of wavefront technology

Journal of Cataract and Refractive Surgery, 2012
This review of wavefront technology looks at 2 major aspects. The first is the basics and principles of the optics of the eye, how to decompose the wavefront in a more adequate way for interpretation, and how these aberrations affect the visual acuity. It also addresses the diversity and complexity of wavefront sensors; how these devices transform the ...
Marcony R. Santhiago, K. M. Rocha, David Smadja, Glauco R. Mello, Ronald R Krueger   +4 more
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Wavefront Aberration and Wavefront Shape

2016
The study of optical systems may be considered from two different perspectives, namely systems analysis and systems design, respectively.
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Deep learning assisted Shack-Hartmann wavefront sensor for direct wavefront detection.

Optics Letters, 2020
The conventional Shack-Hartmann wavefront sensor (SHWS) requires wavefront slope measurements of every micro-lens for wavefront reconstruction. In this Letter, we applied deep learning on the SHWS to directly predict the wavefront distributions without ...
Lejia Hu, Shuwen Hu, W. Gong, Ke Si
semanticscholar   +1 more source

Bilinear wavefront transformation

Journal of the Optical Society of America A, 2009
Truncated expansions such as Zernike polynomials provide a powerful approach for describing wavefront data. However, many simple calculations with data in this form can require significant computational effort. Important examples include recentering, renormalizing, and translating the wavefront data.
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Multilcolor Wavefront Reconstruction

Applied Optics, 1967
Two and three primary colors derived from an He-Ne gas laser and an argon gas laser were employed in recording and reconstructing holograms. For the tricolor case it is possible to reconstruct a three-dimensional multicolor image which possesses almost all the natural hues of the original object.
R. J. Fedorowicz, A. A. Friesem
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Intensity-enhanced deep network wavefront reconstruction in Shack-Hartmann sensors.

Optics Letters, 2020
The Shack-Hartmann wavefront sensor (SH-WFS) is known to produce incorrect measurements of the wavefront gradient in the presence of non-uniform illumination.
Theodore B. Dubose, D. Gardner, A. Watnik   +2 more
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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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The wavefront and delta -wavefront algorithms: a comparative study

[1991 Proceedings] Tenth Annual International Phoenix Conference on Computers and Communications, 2002
The author studies and compares, using rigorous analytical models, the performances of two algorithms, wavefront and delta -wavefront, suitable for processing an important class of recursive queries, the partially-instantiated transitive closure ones. Such a study reveals, among other findings, that the performance of these algorithms individually as ...
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Wavefront sensing with an axicon

Optics Letters, 2011
The use of a large apex-angle axicon for common-path interferometric wavefront sensing is proposed. The approach is a variant of point-diffraction interferometry bearing similarities to pyramidal wavefront sensing. A theoretical basis for wavefront sensing with an axicon is developed, and the outcomes of numerical simulations are compared to ...
Diego Rativa, Brian Vohnsen, Sara Castillo   +2 more
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