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Christian Depeursinge

Cette personne a quitté l’EPFL

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Publications associées (87)

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Beyond the lateral resolution limit by phase imaging

Christian Depeursinge, Muhammed Fatih Toy, Yann Jérôme Michel Pascal Cotte

We present a theory to extend the classical Abbe resolution limit by introducing a spatially varying phase into the illumination beam of a phase imaging system. It allows measuring lateral and axial distance differences between point sources to a higher ac ...

SPIE Society of Photo-optical Instrumentation Engineers2011

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

Christian Depeursinge, 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

Towards an incoherent off-axis digital holographic microscope

Christian Depeursinge, Frédéric Montfort

We propose and experimentally demonstrate a system in which off-axis digital holographic microscopy is realized using a broadband illumination source. Single-shot holographic measurements are enabled, while the coherence noise is removed thanks to the broa ...

Spie-Int Soc Optical Engineering2015

Optical reconstruction of transparent objects with phase-only SLMs

Christian Depeursinge

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

Numerical parametric lens for shifting, magnification and complete aberration compensation in digital holographic microscopy

Pierre Marquet, Christian Depeursinge, Jonas Kühn, Tristan Colomb, Etienne Cuche, Florian Charrière, Nicolas Aspert, Frédéric Montfort, Stéphane Bourquin, Mihaela Marian

The concept of numerical parametric lenses (NPL) is introduced to achieve wavefront reconstruction in digital holography. It is shown that operations usually performed by optical components and described in ray geometrical optics, such as image shifting, m ...

2006

Time-domain optical coherence tomography with digital holographic microscopy

Pierre Marquet, Christian Depeursinge, Etienne Cuche, Florian Charrière, Pia Massatsch

We show that digital holography can be combined easily with optical coherence tomography approach. Varying the reference path length is the means used to acquire a series of holograms at different depths, providing after reconstruction images of slices at ...

2005

Microscopy image resolution improvement by deconvolution of complex fields

Christian Depeursinge, Nicolas Pavillon, Muhammed Fatih Toy, Yann Jérôme Michel Pascal Cotte

Based on truncated inverse filtering, a theory for deconvolution of complex fields is studied. The validity of the theory is verified by comparing with experimental data from digital holographic microscopy (DHM) using a high-NA system (NA=0.95). Comparison ...

Optical Society of America2010

Simultaneous dual-contrast three-dimensional imaging in live cells via optical diffraction tomography and fluorescence

Pierre Marquet, Christian Depeursinge, Chen Liu

We report a dual-contrast method of simultaneously measuring and visualizing the volumetric structural information in live biological samples in three-dimensional (3D) space. By introducing a direct way of deriving the 3D scattering potential of the object ...

2019

Exact Complex-Wave Reconstruction in Digital Holography

Michaël Unser, Christian Depeursinge, Nicolas Pavillon, Chandra Sekhar Seelamantula

We address the problem of exact complex-wave reconstruction in digital holography. We show that, by confining the object-wave modulation to one quadrant of the frequency domain, and by maintaining a reference-wave intensity higher than that of the object, ...

OSA2011

Method and apparatus to measure and compute the amplitude point spread function and associated parameters of a coherent optical imaging system

Pierre Marquet, Christian Depeursinge, Tristan Colomb, Florian Charrière, Mihaela Marian

The invention concerns a method of and an apparatus for the measurement of the Amplitude Point Spread Function (APSF), of an Optical Imaging System (OIS), wherein the APSF is defined as the complex field distribution of the beam delivered by the OIS and or ...

2008

Digital holographic reflectometry

Christian Depeursinge, Jonas Kühn, Tristan Colomb, Nicolas Pavillon, Ahmet Ata Akatay

Digital holographic microscopy (DHM) is an interferometric technique that allows real-time imaging of the entire complex optical wavefront (amplitude and phase) reflected by or transmitted through a sample. To our knowledge, only the quantitative phase is ...

2010

Label-free second harmonic phase imaging of biological specimen by digital holographic microscopy

Pierre Magistretti, Pierre Marquet, Christian Depeursinge, Etienne Shaffer

We have previously developed a new way for nonscanning second-harmonic generation (SHG) microscopy [Opt. Lett. 34, 2450 (2009)]. Based on digital holography, this technique captures, in single-shot hologram acquisition, both the amplitude and the phase of ...

Optical Society of America2010

Digital holographic microscopy: a noninvasive contrast imaging technique allowing quantitative visualization of living cells with subwavelength axial accuracy

Pierre Magistretti, Pierre Marquet, Christian Depeursinge, Tristan Colomb, Benjamin Rappaz, Etienne Cuche

We have developed a digital holographic microscope (DHM), in a transmission mode, especially dedicated to the quantitative visualization of phase objects such as living cells. The method is based on an original numerical algorithm presented in detail elsew ...

2005

Zero-Order-Free Image Reconstruction in Digital Holographic Microscopy

Michaël Unser, Christian Depeursinge, Nicolas Pavillon, Chandra Sekhar Seelamantula

We address the problem of zero-order-free image reconstruction in digital holographic microscopy. We show how the goal can be achieved by confining the object-wave modulation to one quadrant of the frequency domain, and by maintaining a reference-wave inte ...

IEEE2009

Measurement of the integral refractive index and dynamic cell morphometry of living cells with digital holographic microscopy

Pierre Magistretti, Pierre Marquet, Christian Depeursinge, Benjamin Rappaz, Etienne Cuche

We have developed a digital holographic microscope (DHM), in a transmission mode, adapted to the quantitative study of cellular dynamics. Living cells in culture are optically probed by measuring the phase shift they produce on the transmitted wave front. ...

2005

Extended depth-of-focus by digital holographic microscopy

Christian Depeursinge, Jonas Kühn, Tristan Colomb, Nicolas Pavillon, Etienne Cuche

A recurrent problem in microscopy is the finite depth-of-focus linked to the NA of microscope objectives. Digital holographic microscopy (DHM) has the unique feature of being able to numerically change the focus from a single hologram without the need of m ...

Optical Society of America2010

Suppression of the zero-order in off-axis digital holography through nonlinear filtering

Michaël Unser, Christian Depeursinge, Jonas Kühn, Nicolas Pavillon, Chandra Sekhar Seelamantula

We present experimental validation of a new reconstruction method for off-axis digital holographic microscopy (DHM). This method effectively suppresses the object auto-correlation — namely the zero-order term — from holographic data, thereby improving the ...

2009

Digital Holographic Microscopy, a new imaging technology applied to nanotechnology and life

Pierre Magistretti, Pierre Marquet, Christian Depeursinge, Jonas Kühn, Florian Charrière, Tristan Colomb, Etienne Cuche, Nicolas Aspert, Frédéric Montfort, Stéphane Bourquin, Mihaela Marian

2005

Reconstruction in interferometric synthetic aperture microscopy: comparison with optical coherence tomography and digital holographic microscopy

Christian Depeursinge

It is shown that the spatial frequencies recorded in interferometric synthetic aperture microscopy do not correspond to exact backscattering [as they do in unistatic synthetic aperture radar (SAR)] and that the reconstruction process based on SAR is theref ...

2012

Automatic procedure for aberration compensation in digital holographic microscopy and applications to specimen shape compensation

Pierre Marquet, Christian Depeursinge, Jonas Kühn, Tristan Colomb, Etienne Cuche, Florian Charrière, Nicolas Aspert, Frédéric Montfort

We present a procedure that compensates for phase aberrations in digital holographic microscopy by computing a polynomial phase mask directly from the hologram. The phase-mask parameters are computed automatically without knowledge of physical values such ...

2006