Results 171 to 180 of about 145,574 (223)

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.
A A, Friesem, R J, Fedorowicz
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Wavefront scatter and wavefront healing

The Journal of the Acoustical Society of America, 2001
While acoustic scattering is essentially a time domain phenomenon, studies of scattering from objects in water, and from boundaries, have often concentrated on time-independent/cw descriptions. There are, however, critical aspects of the scattering problem which become evident only in the time domain.
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Wavefront reconstruction using smartphone based wavefront sensors

SPIE Proceedings, 2015
Smartphone camera system has the capability of being integrated into powerful field-sensing tools, capturing data and sharing these data with computing servers or cloud experts. The purpose of this work is to implement a wavefront sensor based on the smartphone platform, which has many potential applications in thin-films and bio-related sensing areas.
Zhenyu Yang, Qiwen Zhan
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Wavefront processing of radio-frequency wavefront data

Proceedings of the IEEE, 1984
A class of special-purpose processors is described. These processors are for use in holographic imaging systems that utilize electromagnetic waves with radio frequencies. The systems, which operate in very nearly real time, consist of arrays of receiving antennas with a receiver at each antenna.
G.P. Tricoles, E.E. Brundege, E.L. Rope
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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

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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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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Multi-bit graphene-based bias-encoded metasurfaces for real-time terahertz wavefront shaping: From controllable orbital angular momentum generation toward arbitrary beam tailoring

Carbon, 2019
In this paper, for the first time, a new generation of multi-bit graphene-based bias-encoded metasurfaces (MGBMs) is proposed for real-time reflected wavefront manipulation at terahertz (THz) frequencies. The architecture of the designed MGBM is composed
Kasra Rouhi, Hamid Rajabalipanah, A. Abdolali   +2 more
semanticscholar   +1 more source

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

A reference wavefront for wavefront sensing instruments

Workshop on Optical Fabrication and Testing, 1986
A reference light source (RLS) was designed to allow the measurement and removal of system wavefront errors in wavefront sensing instruments. The wavefront of the RLS is produced by collimating and re-focussing the output of a laser diode onto a 1 micron pinhole aperture.
Lars A. Selberg, Bruce E. Truax
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