ORBi: Tock Jean-Philippe - Figuring sequences on a super-smooth sample

Reference : Figuring sequences on a super-smooth sample


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Multidisciplinary, general & others
	To cite this reference:	http://hdl.handle.net/2268/93457

Title :	Figuring sequences on a super-smooth sample
Language :	English
Author, co-author :	Tock, Jean-Philippe [ > > ]
	Collette, Jean-Paul [ > > ]
	Gailly, Patrick [Université de Liège - ULg > > CSL (Centre Spatial de Liège) >]
	Kampf, Dirk [ > > ]
Publication date :	6-Sep-1999
Main document title :	Optical Fabrication and Testing, Proc. SPIE Volume: 3739
Editor :	Geyl, Roland
	Maxwell, Jonathan
Publisher :	SPIE
Collection and collection volume :	Proceedings of SPIE Volume: 3739
Pages :	132-141
Audience :	International
ISBN :	9780819432131
Event name :	EUROPTO Conference on Optical Fabrication and Testing 1999
Event date :	May 1999
Event organizer :	SPIE
Event place (city) :	Berlin
Event country :	Germany
Keywords :	[en] ion beam figuring ; IBF ; optical fabrication ; aluminium ; nickel ; polishing
Abstract :	[en] An ion beam figuring facility is operational at the Centre Spatial de Liège since 1997. Its present capabilities are described. An extensive characterisation programme is running in order to determine the optimised parameters for various materials and operating conditions. In this frame, tests have been performed on a spherical gold-coated aluminium mirror plated in between with nickel. The nickel plating was used to be super-polished to a BRDF of 1 10-4 at 1 deg at 10 µm wavelength. Micro-roughness and etching rate measurements were realised and influence of ion bombardment on the coating has been established after removal of the gold coating. The gold coating removing was performed by using the ion beam flux. Finally, the mirror has been figured from the original sphere to a parabola. Surface characteristics evolution is also described in terms of micro-roughness and surface error. An overview of the research and development programmes related to this facility is given. Results of this technique and potential impact on optics fabrication are then briefly exposed.
Funders :	Région wallonne : Direction générale des Technologies, de la Recherche et de l'Energie - DGTRE
Name of the research project :	Etude du polissage ionique (II)
Permalink :	http://hdl.handle.net/2268/93457

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