Results 81 to 90 of about 4,697 (265)

Infrared Optical Vortices Generation with Holographic Optical Elements Recorded in Bayfol HX200 Photopolymer

open access: yesPhotonics
Infrared optical vortices are used in the field of optical communications at wavelengths around 1550 nm. A versatile method to generate them is with a Spatial Light Modulator (SLM); however, they are expensive devices and cannot be easily integrated into
Álvaro Paredes-Amorín   +3 more
doaj   +1 more source

Profiling Co‐Occurrent Morphological Phenotypes and Their Degree of Expression Severity in Vacuolated Cells by Holo‐Tomographic Flow Cytometry and Fractal Analysis

open access: yesAdvanced Intelligent Systems, EarlyView.
HTFC gets 3D refractive index tomograms of flowing cells. Label‐free monocytes are engineered to express patterns of cytoplasmic vacuoles. From the tomogram, an efficient dimensionality reduction is operated. Interpretable features are extracted to classify the expression severity of phenotypes coexisting in each cell, visually represented by a seven ...
Marika Valentino   +9 more
wiley   +1 more source

DESIGN AND FABRICATION OF HOLOGRAPHIC OPTICAL ELEMENTS AND KINOFORMS

open access: yes, 1997
"The thesis gives an account of the most important papers found in the literature. They describe the methods employed to generate and to improve the quality of computer generated holograms, different techniques used to code them, and a number of ...
JESUS RAFAEL MOYA CESSA
core  

Scene‐Customized Learning for Multi‐Depth 3D Phase‐Only Hologram Generation

open access: yesAdvanced Intelligent Systems, EarlyView.
 Scene‐customized geometric modeling constructs GM‐4K, a controllable 4K RGB‐D dataset for learning‐based multi‐depth hologram generation. By tuning intensity spectra and depth‐region sampling, the dataset reveals how training‐data statistics affect phase‐only hologram encoding and supports a spectral test framework for evaluating model generalization ...
Yanan Zhang   +5 more
wiley   +1 more source

Three-dimensional holographic optical elements based on new microsystems

open access: yes, 2023
The technology of creation of three-dimensional holographic optical elements with controlled characteristics on the basis of heterophase microsystem "CaF2 core – AgBr shell", alkaline halide crystals (AHC) and chalcogenide glassy semiconductors (CGS) is ...
Жуков, Сергій Олександрович   +5 more
core   +1 more source

Curved holographic optical elements and applications for curved see-through displays

open access: yesJournal of Information Display, 2019
Holographic optical elements (HOEs) have been used as important tools for implementing augmented reality (AR) and see-through displays because they are transparent and thin.
Kiseung Bang   +2 more
doaj   +1 more source

Holographic Optical Elements Based on Edge-lit Holograms

open access: yes, 2014
[[abstract]]A holographic optical element (HOE) simultaneously accompanied with light guiding and beam shaping function is implemented with edge-lit holograms in this study.
Su, Wei-Chia; Tsai, Ming-Hsun; Lin, Hiu-Tzu
core  

Aberration-free lithography setup for fabrication of holographic diffractive optical elements.

open access: yes, 2009
A holographic optical lithography setup with extremely small longitudinal spherical aberration is described. The setup is used for the fabrication of holographic diffractive optical elements intended to collect light emitted from a fluorescence spot ...
MACKO Peter, WHELAN Maurice
core   +1 more source

Guiding and Manipulating Light Fields in Microstructured Liquid Crystals

open access: yesAdvanced Physics Research, EarlyView.
This review summarizes recent advances in guided‐wave optics enabled by microstructured liquid crystal (LC) devices, covering their fundamental material properties, key degree of freedom for dynamic light field manipulations. The advances of linear guided‐wave optics, nonlinear‐optics with spatial optical solitons, and microlasers in LC‐based devices ...
Shan‐shan Chang   +2 more
wiley   +1 more source

HOLOGRAPHIC OPTICAL ELEMENTS FOR BEAUTIFICATION

open access: yesInternational Journal of Research in Engineering and Technology, 2013
In this research, holographic optical element appli ed for beautification recorded in holographic surfa ce relief photoresist. Various symmetric periodic structure with high diff raction efficiency in photosensitive material depen ds on various recording geometry parameters are explained.
openaire   +1 more source

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