Results 321 to 330 of about 82,170 (356)

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

Wavefront guided and custom wavefront refractive surgery

Acta Ophthalmologica, 2010
AbstractAbstract not ...
openaire   +2 more sources

The optics of wavefront sensing [PDF]

Ophthalmology Clinics of North America, 2004
This article reviews the fundamental principles by which wavefront aberrometers measure ocular aberrations. Three different ways of interpreting aberration measurements are described in terms of wavefront phase, slope, and curvature. Although curvature is the more familiar concept from geometrical optics, the wave optics concept of wavefront phase is ...
openaire   +2 more sources

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
semanticscholar   +1 more source

Wavefront shaping in complex media with a 350 kHz modulator via a 1D-to-2D transform

Nature Photonics, 2018
Controlling the propagation and interaction of light in complex media has sparked major interest in the past few years. Unfortunately, spatial light modulation devices suffer from limited speed, which precludes real-time applications such as imaging in ...
O. Tzang, E. Niv, Sakshi Singh, S. Labouesse, G. Myatt, R. Piestun   +5 more
semanticscholar   +1 more source

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.
openaire   +2 more sources

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
openaire   +3 more sources

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.
openaire   +3 more sources

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-
openaire   +2 more sources

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
openaire   +3 more sources