Detection of Micro-Cracks on Highly Specular Reflectors: Dimensioning a Vision Machine Based on Optical Properties

Abstract : This paper describes the complete dimensioning of a method and apparatus dedicated to the automatic detection of defects on optical mirror-like components called optical solar reflector (OSR), which are used to ensure the thermal control of satellites. First, the requirements of the method are defined according to the properties of the OSR (multilayer and semitransparent) and the defects to be detected. The defect dimensions are then measured and exhibit very dispersed micrometric values. Second, the optical characterization of the OSR and its sublayers is conducted, enabling the dimensioning of the machine with regard to the localization of the defect (surface, interface, or volume). Third, a semi-industrial prototype is developed and evaluated through two kinds of experiments. The first experiment illustrates the production capacity of the prototype and the second the measurement capability. Results showed that the prototype exceeded the initial requirements and could be used to replace the currently used control with confidence.
Type de document :
Article dans une revue
IEEE Sensors Journal, Institute of Electrical and Electronics Engineers, 2017, 17 (23), p.7901 - 7907. 〈http://ieeexplore.ieee.org/document/8066307/〉. 〈10.1109/JSEN.2017.2762359〉
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https://hal.archives-ouvertes.fr/hal-01633655
Contributeur : Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Soumis le : lundi 13 novembre 2017 - 11:40:11
Dernière modification le : mardi 14 novembre 2017 - 01:12:02

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Rémi Gilblas, Thierry Sentenac, Jean-José Orteu, Mickaël Sauvée, Guillaume Sierra, et al.. Detection of Micro-Cracks on Highly Specular Reflectors: Dimensioning a Vision Machine Based on Optical Properties. IEEE Sensors Journal, Institute of Electrical and Electronics Engineers, 2017, 17 (23), p.7901 - 7907. 〈http://ieeexplore.ieee.org/document/8066307/〉. 〈10.1109/JSEN.2017.2762359〉. 〈hal-01633655〉

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