Titlebook: Optics in Astrophysics; Proceedings of the N Renaud Foy,Fran?oise Claude Foy Conference proceedings 2005 Springer Science+Business Media B.

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LASER TECHNOLOGIES FOR LASER GUIDED ADAPTIVE OPTICS,ystem design issues are addressed, such as laser spot elongation and brightness. The two main families of LGS, based either on Rayleigh or sodium resonant scattering are discussed in terms of performances and of laser technologies required to match requirements. LGS aided AO systems built for astron

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COATINGS PRINCIPLES,eposition and ion beam sputtering techniques are addressed. Performances of these techniquesand their limitations are illustrated with the characteristics of the VIRGO mirrors coated at LMA. The importance of metrology is emphasized.

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OPTICAL AND INFRARED DETECTORS FOR ASTRONOMY,ect, the telescope-instrument act as “spectacles”. The detectors, meanwhile, have the critical role of sensing the light – the detectors are the “eyes” of an observatory. The performance of an astronomical observatory is directly dependent upon the performance of its detector systems.

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COATINGS PRINCIPLES,eposition and ion beam sputtering techniques are addressed. Performances of these techniquesand their limitations are illustrated with the characteristics of the VIRGO mirrors coated at LMA. The importance of metrology is emphasized.