(19)

(11)

EP 1 105 758 A1

(12)

(43) Date of publication: 13.06.2001 Bulletin 2001/24 (21) Application number: 99930506.3 (22) Date of filing: 21.06.1999

(51) International Patent Classification (IPC)7: G02B 6/22 (86) International application number: PCT/US9913/993 (87) International publication number: WO 0004/410 (27.01.2000 Gazette 2000/04)

(84) Designated Contracting States: DE FI FR GB IT NL (30) Priority: 14.07.1998 US 92835 P (71) Applicant: CORNING INCORPORATED Corning, N.Y. 14831 (US)	(72) Inventors: CAIN, Michael, B. Painted Post, NY 14870 (US) CHU, Polly, W. Painted Post, NY 14870 (US) GROCHOCINSKI, James, M. Newfield, NY 14867 (US) LI, Ming-Jun Horseheads, NY 14845 (US) (74) Representative: Boon, Graham Anthony  Elkington and Fife,Prospect House,8 Pembroke Road Sevenoaks,Kent TN13 1XR Sevenoaks,Kent TN13 1XR (GB)