Publications associées à Focale

Demonstration and future potential of a self-tracking phase change actuator

State-of-the-art concentrators use free-space optics to concentrate sunlight onto photovoltaic cells. To achieve high concentration factors it is necessary to track the sun's position. In current systems, mechanical actuators keep the focal spot in the sol ...

Spie-Int Soc Optical Engineering2014

Self-tracking phase change concentrator device demonstrator

Eric Tremblay, Volker Günter Zagolla

Concentration photovoltaic systems uses free-space optics to concentrate sunlight onto photovoltaic cells, using mechanical trackers to accurately track the sun's position and keep the focal spot on the PV cell. We recently proposed and demonstrated a proo ...

Spie-Int Soc Optical Engineering2014

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

Longitudinal-differential phase distribution near the focus of a high numerical aperture lens: Study of wavefront spacing and Gouy phase

Hans Peter Herzig, Toralf Scharf, Myun Sik Kim

We present a longitudinal-differential (LD) phase distribution near the focus of a high numerical aperture (NA=0.9) aplanatic lens illuminated with a linearly polarized monochromatic plane wave. The Richards and Wolf method is used to compute field distrib ...

Taylor & Francis2013

Phase anomalies in Talbot light carpets of selfimages

Hans Peter Herzig, Toralf Scharf, Myun Sik Kim

An interesting feature of light fields is a phase anomaly, which occurs on the optical axis when light is converging as in a focal spot. Since in Talbot images the light is periodically confined in both transverse and axial directions, it remains an open q ...

Optical Society of America2013

The two-dimensional array of 2048 tilting micromirrors for astronomical spectroscopy

Nico de Rooij, Michael David Canonica, Wilfried Noell

In multi-object spectrometers, field selectors, which are located in the focal plane of the telescopes, are required for the selection of astronomical objects, such as stars or faint galaxies. We present a two-dimensional micromirror array as a field selec ...

Institute of Physics2013

Leakage radiation interference microscopy

Hans Peter Herzig, Elsie Barakat

We present a proof of principle for a new imaging technique combining leakage radiation microscopy with high-resolution interference microscopy. By using oil immersion optics it is demonstrated that amplitude and phase can be retrieved from optical fields, ...

Optical Society of America2013

Microtextured Substrates and Microparticles Used as in Situ Lenses for On-Chip Immunofluorescence Amplification

Martinus Gijs, Hui Yang

We propose a concept for enhancing the fluorescent detection signal of on-chip immunoassays by using three-dimensional 3 and 8 mu m size microtextured structures as substrates for the assay, which allows exploitation of a large number of fluorophores withi ...

Amer Chemical Soc2013

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Focale

Demonstration and future potential of a self-tracking phase change actuator

Self-tracking phase change concentrator device demonstrator

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

Longitudinal-differential phase distribution near the focus of a high numerical aperture lens: Study of wavefront spacing and Gouy phase

Phase anomalies in Talbot light carpets of selfimages

Angular Resolved low loss EELS for Materials Characterization

On Micro Optical Elements for Efficient Light Diffusion

The two-dimensional array of 2048 tilting micromirrors for astronomical spectroscopy

Leakage radiation interference microscopy

Microtextured Substrates and Microparticles Used as in Situ Lenses for On-Chip Immunofluorescence Amplification

Graph Chatbot

Chattez avec Graph Search

Phase anomalies in Talbot light carpets of selfimages

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

The two-dimensional array of 2048 tilting micromirrors for astronomical spectroscopy

Leakage radiation interference microscopy

Microtextured Substrates and Microparticles Used as in Situ Lenses for On-Chip Immunofluorescence Amplification

On Micro Optical Elements for Efficient Light Diffusion

Self-tracking phase change concentrator device demonstrator

Demonstration and future potential of a self-tracking phase change actuator

Longitudinal-differential phase distribution near the focus of a high numerical aperture lens: Study of wavefront spacing and Gouy phase

Angular Resolved low loss EELS for Materials Characterization