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(11)

EP 1 719 008 A1

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(43) Date of publication: 08.11.2006 Bulletin 2006/45 (21) Application number: 05719017.5 (22) Date of filing: 25.02.2005

(51) International Patent Classification (IPC):  G02B 21/00(2006.01) G02B 21/14(2006.01) (86) International application number: PCT/IT2005/000107 (87) International publication number: WO 2005/083489 (09.09.2005 Gazette 2005/36)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR (30) Priority: 27.02.2004 IT RM20040102 (71) Applicant: Universita' Degli Studi di Siena I-53100 Siena (IT)	(72) Inventor: BACCETTI, Baccio, Universita' Degli studi di Siena I-53100 Siena (IT) (74) Representative: Iannone, Carlo Luigi et al Barzanò & Zanardo Roma S.p.A. Via Piemonte 26 00187 Roma 00187 Roma (IT)