Concept

Light field

Publications associées (66)

Fast non-contact surface roughness measurements up to the micrometer range by dual-wavelength digital holographic microscopy

Christian Depeursinge, Eduardo Solanas Vilar, Jonas Kühn, Stéphane Bourquin

We present fast high-roughness and non-contact surface measurements by digital holographic microscopy (DHM). By using single- and dual-wavelength operation modes, coupled with advanced image stitching and non-measured points management methods, the techniq ...

SPIE2010

Several micron-range measurements with sub-nanometric resolution by the use of dual-wavelength digital holography and vertical scanning

Christian Depeursinge, Tristan Colomb, Jonas Kühn

Reflection digital holographic microscopy (DHM) is a very powerful technique allowing measuring topography with a sub-nanometer axial resolution from a single hologram acquisition. But as most of interferometer methods, the vertical range is limited to hal ...

SPIE2009

Method for displaying field of brain of patient during brain surgery involves determining output image from analysis image values and displaying output image

Theo Lasser, Marcel Leutenegger, Antonio Lopez, Erica Martin-Williams

NOVELTY - The display method involves evaluating the sequence of images by: associating a first analysis image value to pixels in the first sequence of images to which pixels of same locations of the field (11) are imaged, respectively; associating a secon ...

2008

Advantages of digital holographic microscopy for real-time full field absolute phase imaging

Christian Depeursinge, Tristan Colomb, Pierre Marquet, Jonas Kühn, Florian Charrière

Different interferometric techniques were developed last decade to obtain full field, quantitative, and absolute phase imaging, such as phase-shifting, Fourier phase microscopy, Hilbert phase microscopy or digital holographic microscopy (DHM). Although, th ...

SPIE2008

Phase sensitive Fourier domain optical coherence tomography

Theo Lasser, Rainer Leitgeb, Adrian Bachmann

Optical Coherence Tomography (OCT) is an imaging technique with high axial resolution in the micro-meter-scale range combined with a high sensitivity allowing for example to probe weakly back-scattering structures beneath the surface of biological t ...

2008

Dual-wavelength digital holographic microscopy with sub-nanometer axial accuracy

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

We present dual-wavelength Digital Holographic Microscopy (DHM) measurements on a certified 8.9 nm high Chromium thin step sample and demonstrate sub-nanometer axial accuracy. We introduce a modified DHM Reference Calibrated Hologram (RCH) reconstruction a ...

SPIE2008

Simultaneous Cell Morphometry and Refractive Index Measurement with Dual-Wavelength Digital Holographic Microscopy

Pierre Magistretti, Christian Depeursinge, Tristan Colomb, Benjamin Rappaz, Pierre Marquet, Florian Charrière

The refractive index and cellular thickness information contained in the phase signal recorded by Digital Holographic Microscopy is measured independently with a dual-wavelength technique exploiting the dispersion of a dye present in the perfusion medium. ...

OSA2008

Real-time dual-wavelength digital holographic microscopy with a single hologram acquisition

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

A technique to perform two-wavelengths digital holographic microscopy (DHM) measurements with a single hologram acquisition is presented. The vertical measurement range without phase ambiguity is extended to the micron-range, thanks to the resulting synthe ...

2007

Real-time dual-wavelength digital holographic microscopy with a single hologram - art. no. 661615

Christian Depeursinge, Tristan Colomb, Frédéric Montfort, Florian Charrière

We report on a method to achieve real-time dual-wavelength digital holographic microscopy with a single hologram acquisition. By recording both interferograms from two laser sources at different wavelengths in only one spatially-multiplexed digital hologra ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2007

Real-time dual-wavelength digital holographic microscopy with a single hologram

Christian Depeursinge, Tristan Colomb, Frédéric Montfort, Jonas Kühn, Florian Charrière

SPIE2007

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