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Publications associées (131)

Trackfree Planar Solar Concentrator System

Solar concentrator systems rely on focusing a large collecting aperture onto a small one where a high efficiency solar cell is placed. The main drawback of concentrator systems is the need to track the direction of the sun. We report on the development of ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2012

Modelling of the quench behaviour of HTS-CCs for RFCLs

Daniele Colangelo, Bertrand Dutoit

Study of the quench phenomenon is crucial for the design of Resistive Fault Current Limiters (RFCLs) based on high temperature superconducting coated conductors (HTS-CCs). An optimal stabilization of the tape is required to achieve both an economic device ...

2012

Microlenses with defined contour shapes

Jürgen Brugger, Victor Javier Cadarso Busto, Loïc Jacot-Descombes

Ink-jet printing of optical ink over SU-8 pillars is here proposed as a technology for obtaining microlenses with shape control. To demonstrate the flexibility of this method, microlenses with five different contour shapes (ranging from circular and ellipt ...

Optical Society of America2011

Subwavelength-size solid immersion lens

Hans Peter Herzig, Toralf Scharf, Myun Sik Kim

We report on the fabrication and characterization of nanoscale solid immersion lenses (nano-SILs) with sizes down to a subwavelength range. Submicrometer-scale cylinders fabricated by electron-beam lithography are thermally reflowed to form a spherical sha ...

2011

Hybrid polymer microlens arrays with high numerical apertures fabricated using simple ink-jet printing technique

Jürgen Brugger, Edoardo Charbon, Vahid Fakhfouri, Dmitri Boiko, Joo Yeon Kim, Nils Benedict Brauer

Microlens arrays fabricated by a direct ink-jet printing of UV-curable hybrid polymer are reported. A periodic pattern of polymer drops was ink-jet printed on the surface-treated glass substrate and cured in the UV-light. Using this simple technique, we de ...

2011

Measuring amplitude and phase of light emerging from microstructures with HRIM

Hans Peter Herzig, Toralf Scharf, Myun Sik Kim

Ultra high-resolution measurements of amplitude and phase fields emerging from fine period amplitude gratings are presented and discussed. In the axial direction periodically repeated features are found, whose origins are the Talbot effect within the Fresn ...

SPIE Digital Library2011

A 99 Dollar Head-Mounted Eye Tracker

Pierre Dillenbourg, Frédéric Kaplan, Andrea Mazzei, Youri Marko

Head-mounted eye-trackers are powerful research tools to study attention processes in various contexts. Most existing commercial solutions are still very expensive, limiting the current use of this technology. We present a hardware design to build, at low ...

2011

Grouping trumps pooling and centroids in crowding

Michael Herzog, Bilge Sayim, Mauro Manassi

In the periphery, discrimination of a target is usually impaired by flanking elements. This crowding effect is often explained in terms of pooling, ie target and flanker signals are averaged. The pooling hypothesis predicts stronger crowding when more flan ...

2011

Novel Concepts for Functional High Resolution Microscopy

Matthias Geissbühler

Functional imaging of biological cells and organs is one of the key techniques that drives new discoveries in life science research and medicine. In this thesis novel concepts for functional imaging at high spatial and temporal resolution are presented. In ...

EPFL2011

Experimental study of velocity fields in rectangular shallow reservoirs

Anton Schleiss, Erica Camnasio

Velocity fields in rectangular shallow reservoirs with different length-to-width and expansion ratios were investigated in an experimental study, to evaluate the effect of geometry on the flow field. A wide range of combinations of these two non-dimensiona ...

2011

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