Results 101 to 110 of about 25,797 (249)

Holographic Lens Array for Solar Collector with Large Angle and Expanded Spectral Width

Applied Sciences
Holographic optical elements (HOEs) are promising for solar energy collection due to their advantages of lightweight and high efficiency, but the narrow reconstruction of their angular and spectral widths limits their application.
Changyu Wang, Yuan Xu, Hong Xu, Juan Liu
doaj   +1 more source

The Submillimeter Array

, 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., James M. Moran, Kwok Yung Lo, Naylor D. A., Paul T. P. Ho, Tong C.   +5 more
core   +1 more source

Review of millimeter‐wave and terahertz near‐field synthetic aperture radar imaging technology

InfoScience, EarlyView.
Abstract This paper comprehensively reviews the development of millimeter‐wave (MMW) and terahertz (THz) near‐field imaging technologies, with an emphasis on the state of synthetic aperture radar (SAR)‐based imaging technologies. Near‐field imaging technologies are categorized into passive and active imaging modes, among which active imaging is favored
Qi Yang, Hongqiang Wang, Xu Chen, Xin Peng   +3 more
wiley   +1 more source

Indeterminacy of Holographic Quantum Geometry

, 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, G. ’t Hooft, G. ’t Hooft, J. Hough, M. Born   +4 more
core   +1 more source

Bio‐inspired nanophotonics: Structural color, chirality, and resonance metasurfaces

InfoMat, EarlyView.
A butterfly‐wing‐inspired anisotropic plasmonic flatband resonant metasurface. Insets, photo of the butterfly, Sasakia charonda, and the SEM image of its wing scale (above); the SEM image of the metasurface (below). Abstract The dazzling colors of butterfly wings and hummingbird feathers are not painted with pigments, but crafted by nature's invisible ...
Weihan Liu, Yao Liang, Din Ping Tsai
wiley   +1 more source

A new low-cost, compact, auto-phoropter for refractive assessment in developing countries

Scientific Reports, 2017
Using a phoropter to measure the refractive error is one of the most commonly used methods by ophthalmologists and optometrists. Here, we demonstrate design and fabrication of a portable automatic phoropter with no need for patient’s feedback. The system
Babak Amirsolaimani, Gholam Peyman, Jim Schwiegerling, Arkady Bablumyan, N. Peyghambarian   +4 more
doaj   +1 more source

Holographic optical system to copy holographic optical elements

, 1991
A holographic system formed by two holographic lenses that, when working with white light, allow selection of a particular wavelength is presented. If adequate spatial and temporal coherence conditions are obtained, it is possible to copy holographic optical elements (HOEs) with partially coherent light by using optical systems formed by holographic ...
Pascual Villalobos, Inmaculada, Beléndez Vázquez, Augusto, Fimia Gil, Antonio   +2 more
openaire   +1 more source

HOLOGRAPHIC OPTICAL ELEMENTS FOR BEAUTIFICATION

International 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

HoloCam: A subsea holographic camera for recording marine organisms and particles [PDF]

, 2000
The HoloCam system is a major component of a multi-national multi-discipline project known as HoloMar (funded by the European Commission under the MAST III initiative).
Alexander, S, Anderson, S, Craig, G, Hendry, DC, Hobson, PR, Lampitt, RS, Lucas-Leclin, B, Nareid, H, Nebrensky, JJ, Player, MA, Saw, K, Tipping, K, Watson, J   +12 more
core  

A personal 360° view of applications of ‘biomimetic’ molecular recognition

Journal of Chemical Technology &Biotechnology, EarlyView.
Abstract Molecular recognition between biological molecules has formed the basis for innumerable applications in biotechnology for the last seven decades or so. Techniques such as affinity chromatography, solid‐phase and aqueous two‐phase extraction, affinity precipitation, biomimetic catalytic systems, biosensors and molecular imprinting all exploit ...
Christopher R Lowe
wiley   +1 more source