Publications related to Vergence (optics)

Extension of ultrasound Fourier slice Imaging theory to sectorial acquisition

Jean-Philippe Thiran, Rafael Eduardo Carrillo Rangel, Adrien Georges Jean Besson, Olivier Bernard

Ultrasound image reconstruction from the echoes received by an ultrasound probe after the transmission of diverging waves is an active area of research because of its capacity to insonify at ultra-high frame rate with large regions of interest using small ...

2015

Grazing angle X-ray fluorescence from periodic structures on silicon and silica surfaces

Andreea Veronica Savu, Wei Cao

Various 3-dimensional nano-scaled periodic structures with different configurations and periods deposited on the surface of silicon and silica substrates were investigated by means of the grazing incidence and grazing emission X-ray fluorescence techniques ...

Pergamon-Elsevier Science Ltd2014

Generation of 0.9-mJ THz pulses in DSTMS pumped by a Cr:Mg2SiO4 laser

Christoph Peter Hauri

We report on high-field terahertz transients with 0.9-mJ pulse energy produced in a 400 mm(2) partitioned organic crystal by optical rectification of a 30-mJ laser pulse centered at 1.25 mu m wavelength. The phase-locked single-cycle terahertz pulses cover ...

Optical Society of America2014

A microfluidic flow-cell for the study of the ultrafast dynamics of biological systems

Majed Chergui, Adrien Alexis Paul Chauvet

The study of biochemical dynamics by ultrafast spectroscopic methods is often restricted by the limited amount of liquid sample available, while the high repetition rate of light sources can induce photodamage. In order to overcome these limitations, we de ...

American Institute of Physics2014

Stationary solar concentrator delivering beyond the étendue law with homogeneous illumination

Marilyne Andersen, Boris Clément Karamata

We describe a concept for a novel stationary solar concentrator that relies on a new self-adaptive optical valve, non-imaging optics and the integrating sphere principle. Our analytical model reveals that this unique combination theoretically allows reachi ...

2014

On Micro Optical Elements for Efficient Light Diffusion

Roland Andreas Bitterli

Efficient light management is one of the key issues in modern energy conversion systems, be it to collect optical power or to redistribute light generated by high power light emitters. This thesis touches mainly on the subject of efficient light redistribu ...

EPFL2013

Development of a ToF setup with an ion - guide for characterization of electrospray microthrusters

Herbert Shea, Caglar Ataman, Simon Dandavino, Daniel George Courtney, Subha Chakraborty

Electrospray microthrusters are a very promising micro-propulsion system which can potentially provide very high specific impulse (Isp ~ 3000s). In this paper, we report on the development of a time-of-flight (ToF) measurement setup for characterization of ...

2013

Design and scaling of monocentric multiscale imagers

Monocentric multi-scale (MMS) lenses are a new approach to high-resolution wide-angle imaging, where a monocentric objective lens is shared by an array of identical rotationally-symmetric secondary imagers which each acquire one overlapping segment of a mo ...

Optical Society of America2012

Reflow Of Non-Circular Nano-Pillars To Fabricate Nano-Scale Solid Immersion Lenses

Hans Peter Herzig, Toralf Scharf, Myun Sik Kim

We investigate the reflow of non-circular, i.e., triangular and square, shaped pillars to fabricate nano-scale solid immersion lenses (SILs). Electron beam lithography (EBL) and thermal reflow are the core of the fabrication process. For the optical charac ...

Ieee2012

Reflow Of Non-Circular Nano-Pillars To Fabricate Nano-Scale Solid Immersion Lenses

Hans Peter Herzig, Gaël David Osowiecki, Toralf Scharf, Myun Sik Kim

We investigate the reflow of non-circular, i.e., triangular and square, shaped pillars to fabricate nano-scale solid immersion lenses (SILs). Electron beam lithography (EBL) and thermal reflow are the core of the fabrication process. For the optical charac ...

Ieee2012

Vergence (optics)

Extension of ultrasound Fourier slice Imaging theory to sectorial acquisition

Grazing angle X-ray fluorescence from periodic structures on silicon and silica surfaces

Generation of 0.9-mJ THz pulses in DSTMS pumped by a Cr:Mg2SiO4 laser

A microfluidic flow-cell for the study of the ultrafast dynamics of biological systems

Stationary solar concentrator delivering beyond the étendue law with homogeneous illumination

On Micro Optical Elements for Efficient Light Diffusion

Development of a ToF setup with an ion - guide for characterization of electrospray microthrusters

Design and scaling of monocentric multiscale imagers

Reflow Of Non-Circular Nano-Pillars To Fabricate Nano-Scale Solid Immersion Lenses

Reflow Of Non-Circular Nano-Pillars To Fabricate Nano-Scale Solid Immersion Lenses

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Extension of ultrasound Fourier slice Imaging theory to sectorial acquisition

Grazing angle X-ray fluorescence from periodic structures on silicon and silica surfaces

On Micro Optical Elements for Efficient Light Diffusion

A microfluidic flow-cell for the study of the ultrafast dynamics of biological systems

Generation of 0.9-mJ THz pulses in DSTMS pumped by a Cr:Mg2SiO4 laser

Design and scaling of monocentric multiscale imagers

Stationary solar concentrator delivering beyond the étendue law with homogeneous illumination

Reflow Of Non-Circular Nano-Pillars To Fabricate Nano-Scale Solid Immersion Lenses

Development of a ToF setup with an ion - guide for characterization of electrospray microthrusters

Reflow Of Non-Circular Nano-Pillars To Fabricate Nano-Scale Solid Immersion Lenses