Skip to Main content Skip to Navigation
Theses

Interférométrie spectrale pour la mesure de dispersion et la géométrie de surface

Abstract : The aim of this PhD work is to build an optical system measurement for characterization of large fields graded index and aspherical lenses. To achieve a complete structure characterization (spatial variation of index and surface profile) we have developed a spectral interferometer. This set-up allows to observe white light channelled spectrum carrying spectral phase information.
One of the originality of this work comes from the use of a white light supercontinuum source generated in a single-mode microstructured fiber. This source offers exceptional performances as a broadband continuous spectrum, a high power density and a high spatial coherence which authorizes the study of rarely tested components.
The spectral interferograms need to be numerically treated in order to perform phase calculation. Profile measurements lead to periodic interferograms and are treated by a seven points algorithm phase calculation, while dispersion measurement leads to aperiodic interferograms and are treated by a simultaneous time-frequency analysis (wavelets transform) combined with a least square fitting method applied on the intensity curve.
The experimental results shows the various abilities of spectral interferometry as : nanometric resolution of profile determination, high resolution of group refractive index measurements (10-3), and simultaneous characterization of chromatic and geometrical aberrations of optical imaging systems.
Document type :
Theses
Complete list of metadatas

Cited literature [68 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00102813
Contributor : Isabelle Verrier <>
Submitted on : Monday, October 2, 2006 - 4:35:10 PM
Last modification on : Monday, October 19, 2020 - 11:03:51 AM
Long-term archiving on: : Tuesday, April 6, 2010 - 1:19:54 AM

Identifiers

  • HAL Id : tel-00102813, version 1

Citation

David Reolon. Interférométrie spectrale pour la mesure de dispersion et la géométrie de surface. Physique [physics]. Université Jean Monnet - Saint-Etienne, 2006. Français. ⟨tel-00102813⟩

Share

Metrics

Record views

601

Files downloads

2715