Publications de Yves Delacrétaz

Optical reconstruction of transparent objects with phase-only SLMs

Christian Depeursinge, Yves Delacrétaz, Cristian Arfire

Three approaches for visualization of transparent micro-objects from holographic data using phase-only SLMs are described. The objects are silicon micro-lenses captured in the near infrared by means of digital holographic microscopy and a simulated weakly ...

Optical Soc Amer2013

Monte Carlo simulation of the field back-scattered from rough surfaces

Stéphane Chamot, Christian Depeursinge, Yves Delacrétaz

A novel approach for the simulation of the field back-scattered from a rough surface is presented. It takes into account polarization and multiple scattering events on the surface, as well as diffraction effects. The validity and usefulness of this simulat ...

2012

Method and apparatus for 3d object shape and surface topology measurements by contour depth extraction acquired in a single shot

Christian Depeursinge, Yves Delacrétaz, Daniel Boss

The invention relates to a method and apparatus for topological or shape measurement of objects of any size, by using an interferometric technique comprising an optical source, with selectable coherence, allowing contouring from single shot interferograms ...

2010

Endoscopic low coherence topography measurement for upper airways and hollow samples

Christian Depeursinge, Jonas Kühn, Yves Delacrétaz, Nicolas Pavillon, Etienne Shaffer, Florian Lang

To evaluate the severity of airway pathologies, quantitative dimensioning of airways is of utmost importance. Endoscopic vision gives a projective image and thus no true scaling information can be directly deduced from it. In this article, an approach base ...

SPIE Society of Photo-optical Instrumentation Engineers2010

Endoscopic low coherence interferometry applied to tri-dimensional contouring of upper airways

Yves Delacrétaz

This thesis presents a novel approach for optical tri-dimensional contouring, requiring only one acquisition to extract a contour depth. It is based on an interferometric setup, using a reduced coherence light source, and is fully adaptable to endoscopic p ...

EPFL2009

Off-axis low coherence interferometry contouring

Christian Depeursinge, Yves Delacrétaz, Nicolas Pavillon, Florian Lang

In this article we present a method to achieve tri-dimensional contouring of macroscopic objects. A modified reference wave speckle interferometer is used in conjunction with a source of reduced coherence. The depth signal is given by the envelope of the i ...

2009

Mobilité urbaine et politiques de déplacements : le cas de trois agglomérations suisses

Yves Delacrétaz

EPFL1998