Fast imaging by photon counting application to long-baseline optical stellar interferometry
Description
Image acquisition by photon counting in the visible spectrum with a high precision on photo-events dating is especially useful for ground-based observations. In the first part of this thesis, and after a review of several techniques for photon acquisition and processing, I introduce a new type of photon counting camera, noticeable for its high temporal resolution and its high maximum counting rate: the DELTA (Detector Enhancement by Linear-projections on Three Axes) camera. I describe the concept of this camera, and the engineering solutions (optics, electronics, computing) that could be used for its construction. The second part of my work regards fringe detection and tracking in ground-based and long- baseline optical stellar interferometry. After a statistical approach of the issue, I describe methods introducing a priori information in the data, in order to have a better detection efficiency. One of the proposed methods, using a priori information on the atmospheric piston, requires a precise photo-event dating, and therefore uses methods described in the first part. (author)
Abstract (French)
L'acquisition d'images en comptage de photons du spectre visible, avec une grande precision sur la date de chaque photoevenement, est particulierement profitable pour les techniques d'observation au sol. Dans la premiere partie de cette these, apres une revue des differentes techniques d'acquisition et de traitements des photoevenements, je presente un nouveau type de camera a comptage, remarquable pour sa haute resolution temporelle, et son haut flux maximum, la camera DELTA (Detection d'Evenements Lumineux par Trois Axes). Je decris le principe de cette camera, ainsi que differentes solutions techniques (optique, electronique, informatique) qui pourraient etre employees. J'expose egalement des nouvelles techniques de mesure et d'exploitation de l'information temporelle liee aux photoevenements. La seconde partie de mon travail concerne la detection et le suivi des franges en interferometrie stellaire optique a longue base au sol. Apres une etude statistique du probleme, je decris les differentes facons d'introduire dans les donnees de l'information a priori pour une meilleure efficacite de la detection. Une des methodes proposees, utilisant l'information a priori sur le piston atmospherique fait appel a une datation precise des photons, et par consequent aux techniques decrites dans la premiere partie. (auteur)Files
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Additional details
Additional titles
- Original title (French)
- Imagerie rapide en comptage de photons. Application a l'interferometrie stellaire optique a longue base
Identifiers
Publishing Information
- Imprint Pagination
- 243 p.
- Report number
- FRNC-TH--9881
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 48078425
- Subject category
- S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- CHARGE-COUPLED DEVICES; COMPUTERIZED SIMULATION; FOURIER ANALYSIS; GAMMA CAMERAS; HUYGENS PRINCIPLE; IMAGE PROCESSING; INTERFEROMETRY; MAXIMUM-LIKELIHOOD FIT; MICHELSON INTERFEROMETER; POLARIZATION; TIME RESOLUTION
- Descriptors DEC
- CAMERAS; INTERFEROMETERS; MATHEMATICAL SOLUTIONS; MEASURING INSTRUMENTS; NUMERICAL SOLUTION; PROCESSING; RESOLUTION; SEMICONDUCTOR DEVICES; SIMULATION; TIMING PROPERTIES
Optional Information
- Notes
- 125 refs.; Available from the INIS Liaison Officer for France, see the 'INIS contacts' section of the INIS website for current contact and E-mail addresses: http://www.iaea.org/inis/Contacts/