Results 71 to 80 of about 26,334 (245)

The Submillimeter Array

open access: yes, 2004
The Submillimeter Array (SMA), a collaborative project of the Smithsonian Astrophysical Observatory (SAO) and the Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), has begun operation on Mauna Kea in Hawaii. A total of eight 6-m telescopes
Blundell R.   +5 more
core   +1 more source

Photopolymer-based stratified volume holographic optical elements

open access: yesOptics Letters, 1992
We report the implementation of stratified volume holographic optical elements (SVHOE's) using DuPont's Omnidex holographic photopolymer material and an in situ exposure technique for simultaneous multilayer grating recording. Experimental measurement of the +1-order angular sensitivity of a seven-layer SVHOE structure shows remarkable agreement with ...
G P, Nordinand, A R, Tanguay
openaire   +3 more sources

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

High speed optical tomography for flow visualization [PDF]

open access: yes
A novel optical architecture (based on holographic optical elements) for making high speed tomographic measurements is presented. The system is designed for making density or species concentration measurements in a nonsteady fluid or combustion flow ...
Hesselink, Lambertus, Snyder, Ray
core   +1 more source

Orbital Angular Momentum Waves: Generation, Detection and Emerging Applications

open access: yes, 2019
Orbital angular momentum (OAM) has aroused a widespread interest in many fields, especially in telecommunications due to its potential for unleashing new capacity in the severely congested spectrum of commercial communication systems.
Chen, Rui   +4 more
core   +1 more source

Holographic measurement of drop-on-demand drops in flight [PDF]

open access: yes, 2011
The analysis of images of ink drops in flight can provide information about jet straightness, drop velocity and volume. However trade-offs between field of view, optical and digital resolution and other factors such as depth of field and optical ...
Castrejón-Pita, JR   +2 more
core  

Indeterminacy of Holographic Quantum Geometry

open access: yes, 2008
An effective theory based on wave optics is used to describe indeterminacy of position in holographic spacetime with a UV cutoff at the Planck scale. Wavefunctions describing spacetime positions are modeled as complex disturbances of quasi-monochromatic ...
Craig J. Hogan   +4 more
core   +1 more source

Compositional Changes for Reduction of Polymerisation-Induced Shrinkage in Holographic Photopolymers

open access: yesAdvances in Materials Science and Engineering, 2016
Polymerisation-induced shrinkage is one of the main reasons why many photopolymer materials are not used for certain applications including holographic optical elements and holographic data storage.
D. Cody   +5 more
doaj   +1 more source

Home - About - Disclaimer - Privacy