Results 111 to 120 of about 27,387 (213)

On the morphology of the scattering medium as seen by MST/ST radars [PDF]

, 1983
Much is learned about the morphology of the small scale structures of the atmosphere from analysis of echoes observed by MST radars. The use of physical models enables a synthesis of diverse observations.
Gage, K. S.
core   +1 more source

Very High Resolution Solar X-ray Imaging Using Diffractive Optics

, 2012
This paper describes the development of X-ray diffractive optics for imaging solar flares with better than 0.1 arcsec angular resolution. X-ray images with this resolution of the \geq10 MK plasma in solar active regions and solar flares would allow the ...
A. Y. Shih, A.H. Gabriel, B. R. Dennis, E. Fabrizio di, G. K. Skinner, G.K. Skinner, G.K. Skinner, G.K. Skinner, J. Krizmanic, J. Krizmanic, J.M. Davila, K.J.H. Phillips, K.J.H. Phillips, K.P. Dere, K.P. Dere, L. Golub, M. J. Li, M. Weber, M. Young, M.J. Aschwanden, P. Lamy, R.P. Lin, S. Vives, S.L. Keil, T.G. Farr   +24 more
core   +1 more source

Generation of a Focused THz Vortex Beam from a Spintronic THz Emitter with a Helical Fresnel Zone Plate. [PDF]

Nanomaterials (Basel), 2023
Zhang X, Xu Y, Hong B, Zhang F, Wang A, Zhao W.   +5 more
europepmc   +1 more source

Broadband Achromatic Metalens in the Visible Light Spectrum Based on Fresnel Zone Spatial Multiplexing. [PDF]

Nanomaterials (Basel), 2022
Shi R, Hu S, Sun C, Wang B, Cai Q.
europepmc   +1 more source

Study of the Off-Axis Fresnel Zone Plate of a Microscopic Tomographic Aberration. [PDF]

Sensors (Basel), 2022
Yang L, Ma Z, Liu S, Jiao Q, Zhang J, Zhang W, Pei J, Li H, Li Y, Zou Y, Xu Y, Tan X.   +11 more
europepmc   +1 more source

Analysis of Predistortion Techniques on Fresnel Zone Plates in Ultrasound Applications. [PDF]

Sensors (Basel), 2021
Fuster JM, Pérez-López S, Belmar F, Candelas P.   +3 more
europepmc   +1 more source

Experimental investigation of a near-field focusing performance of the IP-Dip polymer based 2D and 3D Fresnel zone plate geometries fabricated using 3D laser lithography coated with hyperbolic dispersion surface layered metamaterial. [PDF]

Nanophotonics, 2023
Micek P, Belosludtsev A, Gric T, Pudis D, Gaso P, Goraus M.   +5 more
europepmc   +1 more source

Scintillations during occultations by planets. 1. An approximate theory [PDF]

Scintillations observed during occultations of both stars and spacecraft by planetary atmospheres are discussed theoretically. The effects of severe flattening of the Fresnel zone or source image by defocusing on occultations are presented, along with ...
Young, A. T.
core   +1 more source

Fade Depth Prediction Using Human Presence for Real Life WSN Deployment [PDF]

, 2013
Current problem in real life WSN deployment is determining fade depth in indoor propagation scenario for link power budget analysis using (fade margin parameter).
Horvat, G., Rimac-Drlje, S., Zagar, D.
core   +1 more source

Double-Illumination All-Optical Nanoalignment for Stacking X-Ray Fresnel Zone Plates

Advanced Devices & Instrumentation
Fresnel zone plate (FZP) stacking is an approach to enhance diffraction efficiency in x-ray focusing and imaging by physically aligning 2 or more FZPs to increase the effective thickness and optical efficiency.
Siqi Wang, Cheng Jiang, Robert Peters, Mirwais Aktary, Jinyang Liang   +4 more
doaj   +1 more source