Publications related to High-contrast self-imaging with ordered optical elements

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 ...

2011

A method and apparatus for enhanced spatial bandwidth wavefronts reconstructed from digital interferograms or holograms

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

The present invention discloses a method and an apparatus to compute a complex wavefield, referred to as the object wave o, by means of measuring the intensity signal resulting from the interference of the said object wave with a second wave termed the ref ...

2010

MEASUREMENTS OF LIGHT FIELDS EMERGING FROM FINE AMPLITUDE GRATINGS

Hans Peter Herzig, Toralf Scharf, Myun Sik Kim

High resolution amplitude and phase of light fields emerging from a 2-μm-period amplitude grating are measured for different wavelengths. The amplitude gratings lead to highly periodic patterns caused by the Talbot effect. Such patterns reach periodicities ...

2010

Digital holographic microscopy at fundamental and second harmonic wavelengths

Christian Depeursinge, Etienne Shaffer

Optical second harmonic generation, thanks to its coherent nature, is a suitable signal for interferometric measurements, such as digital holography: a well-established imaging technique that allows recovering of the complex diffraction wavefields from whi ...

SPIE2009

Digital holographic microscopy investigation of second harmonic generated at a glass/air interface

Christian Depeursinge, Nicolas Pavillon, Jonas Kühn, Etienne Shaffer

Optical second harmonic generation, thanks to its coherent nature, is a suitable signal for interferometric measurements, such as digital holography: a well-established imaging technique that allows recovering complex diffraction wavefields from which it i ...

2009

Hard-X-ray dark-field imaging using a grating interferometer

Christian David

Imaging with visible light today uses numerous contrast mechanisms, including bright- and dark-field contrast, phase-contrast schemes and confocal and fluorescence-based methods. X-ray imaging, on the other hand, has only recently seen the development of a ...

2008

Cellular dynamics explored with digital holographic microscopy

Benjamin Rappaz

Obtaining high resolution 3D quantitative images is critical for elucidating the relationship between cell dynamics and physiological or pathological processes. However the feasibility of such cellular dynamic studies is limited by the resolution of the 3D ...

EPFL2008

Gd(III)-EPTPAC16, a new self-assembling potential liver MRI contrast agent: in vitro characterization and in vivo animal imaging studies

Lothar Helm

The recently reported amphiphilic chelate,

[Gd(EPTPAC_{16})(H_2O)]^{2-}

, forms supramolecular aggregates in aqueous solution by self-assembly of the monomers with a relaxometrically determined critical micellar concentration (CMC) of 0.34 mM. The effect ...

2008

Fabrication of diffraction gratings for hard X-ray phase contrast imaging

Christian David

We have developed a method for X-ray phase contrast imaging, which is based on a grating interferometer. The technique is capable of recording the phase shift of hard X-rays travelling through a sample, which greatly enhances the contrast of low absorbing ...

2007

Shot noise, refractive index tomography and aberrations estimation in digital holographic microscopy

Florian Charrière

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 ...

EPFL2007

High-contrast self-imaging with ordered optical elements

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Beyond the lateral resolution limit by phase imaging

A method and apparatus for enhanced spatial bandwidth wavefronts reconstructed from digital interferograms or holograms

MEASUREMENTS OF LIGHT FIELDS EMERGING FROM FINE AMPLITUDE GRATINGS

Digital holographic microscopy at fundamental and second harmonic wavelengths

Digital holographic microscopy investigation of second harmonic generated at a glass/air interface

Hard-X-ray dark-field imaging using a grating interferometer

Cellular dynamics explored with digital holographic microscopy

Gd(III)-EPTPAC16, a new self-assembling potential liver MRI contrast agent: in vitro characterization and in vivo animal imaging studies

Fabrication of diffraction gratings for hard X-ray phase contrast imaging

Shot noise, refractive index tomography and aberrations estimation in digital holographic microscopy

Shot noise, refractive index tomography and aberrations estimation in digital holographic microscopy

Digital holographic microscopy at fundamental and second harmonic wavelengths

Gd(III)-EPTPAC16, a new self-assembling potential liver MRI contrast agent: in vitro characterization and in vivo animal imaging studies

Digital holographic microscopy investigation of second harmonic generated at a glass/air interface

Beyond the lateral resolution limit by phase imaging

A method and apparatus for enhanced spatial bandwidth wavefronts reconstructed from digital interferograms or holograms

Hard-X-ray dark-field imaging using a grating interferometer

Fabrication of diffraction gratings for hard X-ray phase contrast imaging

MEASUREMENTS OF LIGHT FIELDS EMERGING FROM FINE AMPLITUDE GRATINGS

Cellular dynamics explored with digital holographic microscopy