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Concept

Luneburg lens

Publications associées (29)

Synthetic diagnostic for the beam emission spectroscopy diagnostic using a full optical integration

Loïc Hausammann

The beam emission spectroscopy (BES) diagnostic is used to measure fluctuations of electron density in the edge and core of fusion plasmas, and is a key in understanding turbulence in a plasma reactor. A synthetic BES diagnostic for the turbulence simulati ...

Iop Publishing Ltd2017

Antennas for low-cost Ka-band ground terminal devices

Joana Rita Alves dos Santos Silva

The ever-growing demand for high-speed data links together with the increasing congestion in the traditional microwave spectrum are pushing for the exploitation of higher microwave and millimeter-wave (mm-wave) frequencies, including the so-called Ka band. ...

EPFL2017

HOLiCOW - IV. Lens mass model of HE 0435-1223 and blind measurement of its time-delay distance for cosmology

Frédéric Courbin, Vivien François Bonvin

Strong gravitational lenses with measured time delays between the multiple images allow a direct measurement of the time-delay distance to the lens, and thus a measure of cosmological parameters, particularly the Hubble constant, H-0. We present a blind le ...

Oxford Univ Press2017

Refraction limit of miniaturized optical systems: a ball-lens example

Hans Peter Herzig, Toralf Scharf, Wilfried Noell, Myun Sik Kim, Roland Andreas Bitterli

We study experimentally and theoretically the electromagnetic field in amplitude and phase behind ball-lenses across a wide range of diameters, ranging from a millimeter scale down to a micrometer. Based on the observation, we study the transition between ...

Optical Society of America2016

Adamts18 deletion results in distinct developmental defects and provides a model for congenital disorders of lens, lung, and female reproductive tract development

Cathrin Brisken, Alessandra Piersigilli, Marian Caikovski, Dalya Ataca, Yakir Guri

The ADAMTS family comprises 19 secreted metalloproteinases that cleave extracellular matrix components and have diverse functions in numerous disease and physiological contexts. A number of them remain 'orphan' proteases, among them ADAMTS18, which has bee ...

Company Of Biologists Ltd2016

Transition of optical regime in miniaturized optical systems: light interactions beyond the refraction limit

Hans Peter Herzig, Toralf Scharf, Myun Sik Kim

We investigate the transition of optical regimes of miniaturized optical systems using two canonical examples, where the refraction of light limits the system performance. A ball-lens and a solid immersion lens (SIL) are considered, whose refractive respon ...

Spie-Int Soc Optical Engineering2016

Interferometric study on Gouy phase anomaly of microlens array

Hans Peter Herzig, Toralf Scharf, Wilfried Noell, Myun Sik Kim

We investigate the Gouy phase anomaly of light in the focus of refractive plano-convex microlens arrays by using longitudinal-differential (LD) interferometry and a finite-difference time-domain (FDTD) simulation. We put emphasis on determining the amount ...

Spie-Int Soc Optical Engineering2015

Lens-based Ka-band antenna system using planar feed

Juan Ramon Mosig, Marc Esquius Morote, Maria Garcia Vigueras, Joana Rita Alves dos Santos Silva

This paper presents a simple, low-cost and compact mobile ground terminal antenna for Ka-band satellite communications that operates in the downlink band (19.7-20.2 GHz). The antenna is composed of a shaped dielectric lens which tilts in front of a planar ...

2015

A Planar Feed for SOTM Ka-band Lens Antennas

Juan Ramon Mosig, Marc Esquius Morote, Maria Garcia Vigueras, Joana Rita Alves dos Santos Silva

Ka-band satellite technology has been drawing growing interest from public transportation industry to military applications, due to its advantages of higher speed links, smaller terminals and reduced costs. These well-recognized characteristics have also b ...

2015