Publication
Imaging samples larger than the field of view: the SLS experience
Publications associées (36)
Super-resolution from unregistered aliased images with unknown scalings and shifts
We consider the problem of super-resolution from unregistered aliased images with unknown spatial scaling factors and shifts. Due to the limitation of pixel size in the image sensor, the sampling rate for each image is lower than the Nyquist rate of the sc ...
2012Optical Modulators Based on Microfabricated Tilting Flaps Operating at low Actuation Voltages
In this thesis the concept, modelling, design, fabrication process and characterization of novel optical modulators are presented. The devices consist of flaps exhibiting a large tilt with electrostatic actuation at low voltages. The applications comprise, ...
EPFL2012An X-ray computed tomography-based index to characterize the quality of cataclastic carbonate rock samples
Aurèle Parriaux, Pascal Turberg, Reto Meuli, Vincent Labiouse, Pierre Guillaume Christe
X-ray computed tomography (XRCT) can reconstruct, in a nondestructive way and in three-dimension, the distribution of densities within opaque materials. Consequently, it provides an effective possibility to characterize the inner content of rock core sampl ...
2011Extended Focus Optical Coherence Microscopy
Optical coherence tomography (OCT) is an interferometric imaging technique that can provide depth resolved cross-sectional views of biological tissue. OCT employs light with low temporal and yet high spatial coherence. The sample is illuminated point by po ...
EPFL2010SOI digital pixel sensor based on charge pumping
Maher Kayal, Jean-Michel Sallese, Louis Harik
In this paper, a digital pixel sensor in silicon on insulator (SOI) is presented. The active part is a partially depleted SOI phototransistor. The technique elaborated in Harik et al. (2008) [1] was designed and implemented. Moreover, we took advantage of ...
Elsevier2010Advanced phase-contrast imaging using a grating interferometer
Christian David, Marco Stampanoni
Phase-sensitive X-ray imaging methods can provide substantially increased contrast over conventional absorption-based imaging, and therefore new and otherwise inaccessible information. Differential phase-contrast (DPC) imaging, which uses a grating interfe ...
2009SOI digital pixel sensor based on charge pumping
Maher Kayal, Jean-Michel Sallese, Louis Harik
Abstract-In this paper, a digital pixel sensor in SOl is presented. The active part is a partially depleted Sol phototransistor. The technique elaborated in [I] was designed and implemented. Moreover, we took advantage of some of the characteristics of the ...
IEEE Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009A method for radiographic and tomographic imaging based on the absorption, phase shift, and scattering of x-rays
The present invention relates to an interferometer for x-rays, in particular hard x-rays, for obtaining quantitative x-ray images from an object, comprising: a) an x-ray source, preferably a standard polychromatic x-ray source, b) a diffractive beam splitt ...
2007Shot noise, refractive index tomography and aberrations estimation in digital holographic microscopy
The present thesis develops some specific aspects of digital holographic microscopy (DHM), namely the effect of shot noise on the phase image accuracy, the use of DHM in micro-tomography and in aberrations evaluation of a microscope objective (MO). DHM is ...
EPFL2007Tomography using multiple wavelengths in digital holographic microscopy
This thesis presents a new tomographic imaging method using multiple wavelengths in digital holographic microscopy. It is based on the addition of several reconstructed wavefronts measured at different wavelengths. The resulting diffraction tomographic vis ...
EPFL2006