Skip to Main content Skip to Navigation
Theses

Principe de tomographie et spectro-tomographie optique de cohérence par intercorrelation sans balayage basée sur un réseau de diffraction

Abstract : This thesis proposes a new method of detection, intermediate between the two existing methods in OCT, which is: OCT in time domain and OCT in frequency domain (FDOCT). The OCT technique that we present is without postprocessing and uses a grating-based correlation. The A-scan signal is directly recorded on the image sensor. Due to the grating-based system, no correlation scan is necessary. One part of the thesis is dedicated to the description of the working principle and to the architecture of the device. By introducing a transverse scanning into the system, images in two dimensions and three dimensions of the sample were realized. We describe thereafter how we extract spectroscopic information from the depth of the sample analyzed, optically, without postprocessing, using the same technique. For this, a system for wavelength demultiplexing is introduced into the OCT device which becomes an instrument for spectroscopic optical coherence tomography. In this way, for each object point analysis, a two-dimensionnal image is displayed in real time on a 2D camera. The horizontal direction corresponds to the depth and the vertical direction corresponds to the spectral decomposition of the correlation trace. We present the principle of the system as well as experimental results.
Document type :
Theses
Complete list of metadatas

Cited literature [104 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00544927
Contributor : Bélinda Lafon <>
Submitted on : Thursday, December 9, 2010 - 11:28:36 AM
Last modification on : Thursday, November 12, 2020 - 9:42:07 AM
Long-term archiving on: : Thursday, March 10, 2011 - 1:32:08 PM

Identifiers

  • HAL Id : tel-00544927, version 1

Citation

Malha Ouadour. Principe de tomographie et spectro-tomographie optique de cohérence par intercorrelation sans balayage basée sur un réseau de diffraction. Sciences de l'ingénieur [physics]. Université de Franche-Comté, 2009. Français. ⟨tel-00544927⟩

Share

Metrics

Record views

459

Files downloads

8335