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Publications associées (80)

Diffractionless Fourier Domain Microscopy

Theo Lasser, Rainer Leitgeb, Cédric Blatter, Tilman Schmoll

Several methods have been proposed and realized to increase the lateral resolution in microscopy and ultimately to beat the actual diffraction limit as stated by Abbe. Structured illumination for example enhances the lateral resolution by virtually extendi ...

2011

High Spatial and Spectral Resolution Long-Range Sensing Using Brillouin Echoes

Luc Thévenaz, Sang Hoon Chin, Nikolay Primerov, Kwang-Yong Song, Stella Foaleng Mafang

While classical configurations have a practical spatial resolution of 1 meter, novel approaches have been demonstrated that can overcome this limit to offer spatial resolutions in the centimetre range, while preserving full measurand accuracy. ...

Optical Society of America2011

A speckle-based CMOS sensor array for arbitrary surface movement detection

Pierre-André Farine, Chao Wang, Steve Tanner

The paper presents a CMOS sensor array for the detection of speckle movements, for applications requiring accurate movement tracking of arbitrary surfaces. The array is made of eight sensors incorporating each a spatial comb filter with a pitch of 2.8μm so ...

SPIE Society2011

Enhancing Single Molecule Imaging in Optofluidics and Microfluidics

Andreas Vasdekis, Grégoire Pierre Jean Laporte

Microfluidics and optofluidics have revolutionized high-throughput analysis and chemical synthesis over the past decade. Single molecule imaging has witnessed similar growth, due to its capacity to reveal heterogeneities at high spatial and temporal resolu ...

2011

Resource and Performance Comparisons for Different Acquisition Methods that can be Applied to a VHDL-based GPS Receiver in Standalone and Assisted Cases

Pierre-André Farine, Cyril Botteron, Jérôme Leclère

There are mainly three well-known techniques to acquire a GNSS signal. The first, called Serial Search Acquisition, consist in correlating the Pseudo-Random Noise (PRN) codes for all the codes phases and all the frequency bins. The two others make use of t ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

High spatial and spectral resolution long-range sensing using Brillouin echoes

Luc Thévenaz, Stella Foaleng Mafang

High spatial (~cm) and spectral (~MHz) resolution Brillouin sensing is realized with enhanced signal to noise ratio using a pre-activated acoustic field and an optical phase control over the interrogating pulse. Pre-activation of the acoustic field preserv ...

2010

Submicrometer tomography of cells by multiple-wavelength digital holographic microscopy in reflection

Christian Depeursinge, Tristan Colomb, Frédéric Montfort, Nicolas Pavillon, Benjamin Rappaz, Pierre Marquet, Jonas Kühn, Corinne Moratal

We present first results on a method enabling mechanical scanning-free tomography with submicrometer axial resolution by multiple-wavelength digital holographic microscopy. By sequentially acquiring reflection holograms and summing 20 wavefronts equally sp ...

2009

Global stimulus configuration modulates crowding

Michael Herzog, Bilge Sayim, Toni Saarela

In crowding, neighboring elements impair the perception of a peripherally presented target. Crowding is often regarded to be a consequence of spatial pooling of information that leads to the perception of textural wholes. We studied the effects of stimulus ...

Association for Research in Vision and Ophthalmology2009

Probability density optical tomography of confined quasiparticles in a semiconductor microcavity

Benoît Marie Joseph Deveaud, Gaël Nardin, François Morier-Genoud, Barbara Pietka, Taofiq Paraïso, Ounsi El Daïf, Roland Cerna

We present the optical tomography of the probability density of quasiparticles, the microcavity polaritons, confined in three dimensions by cylindrical traps. Collecting the photoluminescence emitted by the quasimodes under continuous nonresonant laser exc ...

2009

Crowding is modulated by global stimulus configuration

Michael Herzog, Bilge Sayim, Toni Saarela

In crowding, neighbouring elements impair the perception of a target. Crowding is often considered a consequence of spatial pooling of visual information. We investigated the role of configural effects in crowding by manipulating the global stimulus config ...

2008

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