(19)

(11)

EP 0 489 060 A1

(12)

(43) Date of publication: 10.06.1992 Bulletin 1992/24 (21) Application number: 90912526.0 (22) Date of filing: 10.08.1990

(51) International Patent Classification (IPC):  A61B 6/ 06( . ) H05G 1/ 26( . ) G21K 1/ 04( . ) (86) International application number: PCT/EP1990/001329 (87) International publication number: WO 1991/003056 (07.03.1991 Gazette 1991/06)

(84) Designated Contracting States: DE FR GB IT NL (30) Priority: 22.08.1989 NL 19890002117 (71) Applicant: B.V. Optische Industrie "De Oude Delft" NL-2612 XE Delft (NL)	(72) Inventor: GELUK, Ronald, Jan NL-2631 PL Nootdorp (NL) (74) Representative: van der Burg, Louis  b.v. Optische Industrie De Oude Delft Van Miereveltlaan 9 NL-2612 XE Delft NL-2612 XE Delft (NL)