(19)

(11)

EP 0 515 567 A1

(12)

(43) Date of publication: 02.12.1992 Bulletin 1992/49 (21) Application number: 91905722.0 (22) Date of filing: 11.02.1991

(51) International Patent Classification (IPC):  G02B 5/ 18( . ) (86) International application number: PCT/US1991/000947 (87) International publication number: WO 1991/012543 (22.08.1991 Gazette 1991/19)

(84) Designated Contracting States: CH DE FR GB IT LI (30) Priority: 13.02.1990 US 19900479474 (71) Applicants: HOLO-OR LTD. Rehovot 76100 (IL) Coherent, Inc. Palo Alto California 94304 (US)	(72) Inventors: GROSSINGER, Israel 76 100 Rehovot (IL) KEDMI, Yossi 76 100 Rehovot (IL) (74) Representative: Jackson, David Spence, et al  REDDIE & GROSE 16, Theobalds Road London, WC1X 8PL London, WC1X 8PL (GB)