(19)

(11)

EP 0 188 541 A1

(12)

(43) Date of publication: 30.07.1986 Bulletin 1986/31 (21) Application number: 85903587.0 (22) Date of filing: 01.07.1985

(51) International Patent Classification (IPC):  G02B 5/ 10( . ) G02F 1/ 1335( . ) G09B 9/ 30( . ) F21V 7/ 08( . ) G02F 1/ 13357( . ) H01J 61/ 88( . ) (86) International application number: PCT/US1985/001254 (87) International publication number: WO 1986/000685 (30.01.1986 Gazette 1986/03)

(84) Designated Contracting States: CH DE FR GB IT LI NL SE (30) Priority: 16.07.1984 US 19840631281 (71) Applicant: Hughes Aircraft Company Los Angeles, California 90045-0066 (US)	(72) Inventor: GAGNON, Ralph, J. Chico, CA 95926 (US) (74) Representative: Colgan, Stephen James, et al  CARPMAELS & RANSFORD 43 Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)