Results 21 to 30 of about 12,678 (263)

Computer-generated holograms [PDF]

open access: yesPhotoniques, 2017
Diffractive optical elements (DOEs) have many advantages over conventional ones. For a start, they are generally lighter, take up less room, and have a wider variety of properties. They can also be used to fabricate hybrid elements that modify polarization, compensate for dispersion, and so on.
openaire   +1 more source

Broadband Holography via Structured Black Silicon Nano-Antennas

open access: yesApplied Sciences, 2019
Computer-generated holograms have wide applications in different fields of optics, ranging from imaging, data storage, to security.Herein, we report a new method for the fabrication of large-scale computer-generated holograms from an inexpensive material,
Mohammed Sait   +2 more
doaj   +1 more source

3D computer generated medical holograms using spatial light modulators

open access: yesJournal of Electrical Systems and Information Technology, 2014
The aim of this work is to electronically generate the diffraction patterns of medical images and then trying to optically reconstruct the corresponding holographs to be displayed in space.
Ahmed Sheet   +6 more
doaj   +1 more source

Holography with high-power CW coherent terahertz source: optical components, imaging, and applications

open access: yesLight: Advanced Manufacturing, 2022
This paper presents the results of 15 years of studies in the field of terahertz holography at the Novosibirsk free electron laser. They cover two areas: research on obtaining holographic images in the terahertz range and the use of diffractive optical ...
Yulia Choporova   +2 more
doaj   +1 more source

High-space bandwidth product computer-generated holography using volume holography [PDF]

open access: yes, 1993
We suggest a method for coding high resolution computer-generated volume holograms. It involves splitting the computer-generated hologram into multiple holograms, each individually recorded as a volume hologram utilizing the maximal resolution available ...
Barhen, Jacob   +3 more
core   +1 more source

Nondiffracting images under coherent illumination [PDF]

open access: yes, 1995
The focal depth of an arbitrary image is extended by optimization of the amplitude and phase distributions over the entire image. We propose a general method that takes advantage of a detector’s (possibly nonlinear) response to incident intensity.
Rosen, Joseph, Salik, Boaz, Yariv, Amnon
core   +2 more sources

Tunable Axicons Generated by Spatial Light Modulator with High-Level Phase Computer-Generated Holograms

open access: yesApplied Sciences, 2020
Axicon is an interesting optical element for its optical properties. This paper presents an approach to dynamically generated tunable axicons with a spatial light modulator (SLM).
Zhongsheng Zhai   +3 more
doaj   +1 more source

Approximated Wavefront Composition for Computer-Generated Holograms Based on Tiny Logic Operations

open access: yesIEEE Access, 2023
Accelerating the calculation of computer-generated holograms (CGHs) is an urgent requirement for realizing practical electro-holography for three-dimensional (3D) displays.
Takashi Nishitsuji   +3 more
doaj   +1 more source

Computer-Generated Hologram Based on Reference Light Multiplexing for Holographic Display

open access: yesApplied Sciences, 2021
In this article, we propose a reference light wave multiplexing scheme to increase the information capacity of computer-generated holograms. The holograms were generated by different reference light waves and superimposed together as a multiplexed ...
Dapu Pi, Juan Liu
doaj   +1 more source

Photolithographic fabrication method of computer-generated holographic interferograms [PDF]

open access: yes, 1989
We consider the fabrication of high-quality interferogram-type diffractive optical elements with conventional photolithographic techniques and compare the results with those achievable with electron-beam lithography. The fringes associated with the phase
Byckling, Eero   +6 more
core   +1 more source

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