(19)

(11)

EP 0 865 624 A1

(12)

(43) Date of publication: 23.09.1998 Bulletin 1998/39 (21) Application number: 97939833.0 (22) Date of filing: 05.09.1997

(51) International Patent Classification (IPC):  G02B 6/ 35( . ) G02B 26/ 02( . ) (86) International application number: PCT/US1997/015725 (87) International publication number: WO 1998/010321 (12.03.1998 Gazette 1998/10)

(84) Designated Contracting States: AT CH DE ES FR GB IE IT LI SE (30) Priority: 06.09.1996 US 19960709090 (71) Applicant: Laughlin, Richard, H. Richardson, TX 75081 (US)	(72) Inventor: Laughlin, Richard, H. Richardson, TX 75081 (US) (74) Representative: Harris, Ian Richard  D. Young & Co., 21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)