(19)

(11)

EP 1 183 560 A1

(12)

(43) Date of publication: 06.03.2002 Bulletin 2002/10 (21) Application number: 00932178.7 (22) Date of filing: 08.05.2000

(51) International Patent Classification (IPC)7: G02B 6/00 (86) International application number: PCT/US0012/550 (87) International publication number: WO 0068/718 (16.11.2000 Gazette 2000/46)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 07.05.1999 RU 99109637 (71) Applicant: CORNING INCORPORATED Corning, N.Y. 14831 (US)	(72) Inventors: ELLISON, Adam, J. Corning, NY 14831 (US) ROSTISLAV, Khrapko Corning, NY 14831 (US) (74) Representative: Marchant, James Ian et al Elkington and Fife, Prospect House, 8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)