Publications associées à Ouverture numérique

Fourier Domain Optical Coherence Microscopy with Extended Depth of Field

Theo Lasser, Cathrin Brisken, Yann Barrandon, Marcel Leutenegger, Rainer Leitgeb, Martin Villiger, Adrian Bachmann, Joan Goulley, Lukas Steinmann

Fourier Domain Optical Coherence Tomography (FDOCT) is a high speed biomedical imaging modality which extracts the sample structure in depth. The axial resolution is given by the coherence length of the employed light source. The lateral resolution on the ...

2008

Enhancement of extended depth of field by digital focusing

Theo Lasser, Rainer Leitgeb, Martin Villiger, Cédric Blatter

With the use of a Bessel-like illumination beam produced by an axicon lens an extended depth of field can be achieved. The resulting illumination pattern exhibits a strong central lobe extending over 300um along the optical axis without diffraction. Here w ...

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

Advanced passive micro-optical elements

Micro-optical elements are optical elements having size or details in the range of the micrometer scale. The emergency of such elements is strongly linked to the development made in the fabrication techniques during the nineties to follow the still actual ...

Institut de Microtechnique, Université de Neuchâtel2008

Lattice-matched GaN-InAlN waveguides at lambda=1.55 mu m grown by metal-organic vapor phase epitaxy

Nicolas Grandjean, Jean-François Carlin, Eric Feltin, Sylvain Nicolay, Mauro Mosca

We report on the demonstration of low-loss, single-mode GaN-InAlN ridge waveguides (WGs) at fiber-optics telecommunication wavelengths. The structure grown by metal-organic vapor phase epitaxy contains AlInN cladding layers lattice-matched to GaN. For slab ...

2008

Reusability of nanostencils for the patterning of Aluminum nanostructures by selective wet etching

Jürgen Brugger, Luis Guillermo Villanueva Torrijo, Andreea Veronica Savu, Marc Antonius Friedrich van den Boogaart, Oscar Vazquez Mena

One of the major advantages of stencil lithography is the possibility to use stencils many times. However, when stencils contain nanoapertures, the clogging of the membranes limits the useful life time of the stencils. The clogging is due to the accumulati ...

Elsevier2008

Fluorescence correlation spectroscopy with sub-diffraction-limited resolution using near-field optical probes

Dusan Vobornik

We report fluorescence correlation spectroscopy (FCS) measurements using near-field scanning optical microscopy (NSOM) probes to produce a sub-diffraction-limited observation area. An order of magnitude reduction in the area compared to confocal FCS has be ...

American Institute of Physics2008

Numerical Optics in Digital Holography

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

As digital holography achieves numerical reconstruction of the complex wavefront diffracted by specimen, a numerical optics formalism has been developed: numerical filters replace pinholes in Fourier planes, numerical lenses allow aberrations compensation ...

OSA2007

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Ouverture numérique

Fourier Domain Optical Coherence Microscopy with Extended Depth of Field

Enhancement of extended depth of field by digital focusing

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

Advanced passive micro-optical elements

Inkjet printing and high aspect ratio structuring for polymer-based micro and nano systems

Lattice-matched GaN-InAlN waveguides at lambda=1.55 mu m grown by metal-organic vapor phase epitaxy

Experimental observation using particle image velocimetry of inertial waves in a rotating fluid

Reusability of nanostencils for the patterning of Aluminum nanostructures by selective wet etching

Fluorescence correlation spectroscopy with sub-diffraction-limited resolution using near-field optical probes

Numerical Optics in Digital Holography

Graph Chatbot

Chattez avec Graph Search

Experimental observation using particle image velocimetry of inertial waves in a rotating fluid

Advanced passive micro-optical elements

Enhancement of extended depth of field by digital focusing

Lattice-matched GaN-InAlN waveguides at lambda=1.55 mu m grown by metal-organic vapor phase epitaxy

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

Inkjet printing and high aspect ratio structuring for polymer-based micro and nano systems

Reusability of nanostencils for the patterning of Aluminum nanostructures by selective wet etching

Fluorescence correlation spectroscopy with sub-diffraction-limited resolution using near-field optical probes

Fourier Domain Optical Coherence Microscopy with Extended Depth of Field

Numerical Optics in Digital Holography