Concept

Huygens–Fresnel principle

Related publications (58)

Shot 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 ...

EPFL2007

On the chromatic aberration of microlenses

Hans Peter Herzig, Toralf Scharf

The optical properties of plano-convex refractive microlenses with low Fresnel Number (typically FN < 10) are investigated. It turns out that diffraction effects at the lens aperture limit the range of the effective focal length. The upper limit of the foc ...

2006

Submicrometer optical tomography by multiple-wavelength digital holographic microscopy

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

We present a method for submicrometer tomographic imaging using multiple wavelengths in digital holographic microscopy. This method is based on the recording, at different wavelengths equally separated in the k domain, in off- axis geometry, of the interfe ...

2006

Analyzing the phonon-polariton response of silicon Carbide microparticles and nanoparticles by use of the Bondary Element Method

Hans Peter Herzig

We present our investigation of the torque exerted on dielectric elliptical cylinders by highly focused laser beams. The calculations are performed with rigorous diffraction theory, and the size-dependent torque is analyzed as a function of the axis ratio. ...

2005

Theoretical and experimental investigation of phase singularities generated by optical micro- and nano-structures

Hans Peter Herzig

Phase singularities appear in the diffracted far-field of an optical micro-structure if the object is of a sufficient lateral size to induce an appropriate phase delay. We present results that determine the critical dimension of a single phase bar for the ...

2004

Point spread function model for microscopic image deconvolution in digital holographic microscopy

Christian Depeursinge, Etienne Cuche, Mihaela Marian

A simple model is proposed in order to evaluate the complex amplitude point spread function (intensity and phase) of a microscope objective. The model is based on the Fresnel diffraction theory and takes also into account the possible optical aberrations. ...

SPIE2003

Towards A More Rigorous Boresight Determination: Theory, Technology and Realities of Inertial/GPS Sensor Orientation

Jan Skaloud

This work focuses on the stochastic properties of boresight determination between a strapdown IMU and a frame-based imaging sensor. The core of the stochastic model is a rigorous error propagation of the estimated input accuracies and their correlations. ...

2003

Low-data simulation of diffractive optical elements based on the zones geometry

Hans Peter Herzig

Design and simulation of two-dimensional diffractive optical elements are often limited by the amount of data required to represent the element in the computer's memory. We present a technique based on a geometrical description of the element, which requir ...

2002

Applications of density functional theory-based methods in medicinal chemistry

Ursula Röthlisberger

A review. With the advances in genomics, proteomics and functional genomics new therapeutic targets to be tackled by medicinal chem. are expected. This article reviews applications of first principle methods to address medicinal chem. issue related to drug ...

2002

Spatial filtering for zero-order and twin-image elimination in digital off-axis holography

Christian Depeursinge, Etienne Cuche, Pierre Marquet

Off-axis holograms recorded with a CCD camera are numerically reconstructed with a calculation of scalar diffraction in the Fresnel approximation. We show that the zero order of diffraction and the twin image can be digitally eliminated by means of filteri ...

2000

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