(19)

(11)

EP 1 131 666 A1

(12)

(43) Date of publication: 12.09.2001 Bulletin 2001/37 (21) Application number: 98949565.0 (22) Date of filing: 28.09.1998

(51) International Patent Classification (IPC)7: G02B 27/10 (86) International application number: PCT/US9820/249 (87) International publication number: WO 0019/264 (06.04.2000 Gazette 2000/14)

(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 (71) Applicant: T Squared G Incorporated Denver, CO 80224 (US)	(72) Inventors: ROPE, Ronald, E. Denver, CO 80224 (US) PULLAM, Martin, L. Littleton, CO 80123 (US) (74) Representative: Moir, Michael Christopher et al Mathys & Squire100 Gray's Inn Road London WC1X 8AL London WC1X 8AL (GB)