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Publications associées (56)

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

Curved Transflective Holographic Screens for Head-Mounted Display

Jürgen Brugger, Christophe Moser, Eric Tremblay, Victor Javier Cadarso Busto, Jonas Grossenbacher, Arnaud Mader, Seyedpayam Vahdati

A volume hologram recorded with a lens array is proposed as a transflective screen for Head Worn Display (HWD) systems. Design, fabrication as well as proof of concept are reported. Light from a projection system, with similar properties to one mounted on ...

Spie-Int Soc Optical Engineering2013

Design of a miniature laser scanning head for high-bandwidth, low-amplitude beam steering

Yves Bellouard, Reymond Clavel

In laser micro-manufacturing, one of the challenges is to achieve fast scanning speed for fast fabrication of complex 3D microstructures. For microstructures with nanoscale features, it is often desirable to steer laser beams from a few microns to a few te ...

2012

Inkjet printing of SU-8 for high-aspect ratio spherical polymeric microstructures

Jürgen Brugger, Victor Javier Cadarso Busto, Rosario Maurizio Gullo, Loïc Jacot-Descombes

SU-8 exhibits interesting mechanical and optical properties for various MEMS applications, such as the development of micro lens and ball-like lens arrays. One of the most common method to fabricate such structures, is thermal reflow. However, a promising ...

2011

Spatio-temporally focused femtosecond laser pulses for nonreciprocal writing in optically transparent materials

Yves Bellouard, Erica Kathleen Block

Simultaneous spatial and temporal focusing (SSTF) provides precise control of the pulse front tilt (PFT) necessary to achieve nonreciprocal writing in glass wherein the material modification depends on the sample scanning direction with respect to the PFT. ...

Optical Society of America2010

Electrically Tunable PDMS Lenses Using Integrated mm-Scale Dielectric Elastomer Actuators

Herbert Shea, Muhamed Niklaus

We report on the modelling, fabrication and testing of small arrays of mm-diameter PDMS lenses whose focal length can be electrically tuned. The lenses consist of an array of 1 to 3 mm diameter electroactive polymer actuators bonded to a socket that provid ...

Messe Bremen-Hvg Hanseatische Veranstaltungs-Gmbh, Findorffstrasse 101, Bremen, 28215, Germany2010

Versatile optical access to the tunnel gap in a low-temperature scanning tunneling microscope

Klaus Kern, Alexander Kabakchiev

We developed a setup that provides three independent optical access paths to the tunnel junction of an ultrahigh vacuum low temperature (4.2 K) scanning tunneling microscope (STM). Each path can be individually chosen to couple light in or out, or to image ...

2010

Array of lenses with individually tunable focal-length based on transparent ion-implanted EAPs

Herbert Shea, Samuel Rosset, Muhamed Niklaus

We report on the fabrication and characterization of 2x2 arrays of mm-diameter PDMS lenses whose focal length can be electrically tuned. Dielectric elastomer actuators generally rely on carbon powder or carbon grease electrodes, which are not transparent, ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2010

Mechanically tuneable microoptical structure based on PDMS

Jürgen Brugger, Luis Guillermo Villanueva Torrijo, Victor Javier Cadarso Busto

A system of two solid microlenses with uncoupled optical properties is presented. This structure has been designed in order to have one lens as a reference, while the other one can be mechanically tuneable. The reference lens presents a diameter of 2 mu m ...

Elsevier2010

Weak signals as a flexible framing space for enhanced management and decision-making

Pierre Rossel

This paper revisits theories of weak signal analysis using the concepts of 'framing' and 'meta-framing' to provide an enriched methodological environment for management and decision-making in turbulent contexts. This attempt takes place within the effort t ...

2009

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