Reference : Phase retarders in liquid crystals polymers

	Document type :	Scientific conferences in universities or research centers : Scientific conference in universities or research centers
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/2268/123326

Title :	Phase retarders in liquid crystals polymers
Language :	English
Author, co-author :	Piron, Pierre [Université de Liège - ULg > Département de physique > Optique - Hololab >]
Publication date :	12-Mar-2012
Audience :	National
Event name :	Actions de Recherche Concertées (FOURTH MEETING) Space and Ground-Based Imaging in Astrophysics
Event date :	22 mai 2012
Keywords :	[fr] biréfringence ; coronographie ; holographie de polarisation
Abstract :	[en] Liquid crystals polymers posses birefringent properties and they are locally orientable, they allow the realization of space variant optical retarders which creates non uniformly polarized beam. To realize a retarder, liquid crystals are exposed to a UV linearly polarized beam, the optical axis of the retarder will be parallel to the incident polarization. We shall present an innovative way to produce space-variant retarders without mechanical interaction polarization holography . Superposing several beams differently polarized, results in a non-uniformly polarized recording beam used to realize space variant retarders. We shall also present our research retarders for two applications based on this method polarization analysis and coronagraphy.
Research units :	Hololab
Funders :	Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/123326

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