(19)

(11)

EP 0 866 942 A1

(12)

(43) Date of publication: 30.09.1998 Bulletin 1998/40 (21) Application number: 97936827.0 (22) Date of filing: 08.09.1997

(51) International Patent Classification (IPC):  G01B 7/ 00( . ) G01B 7/ 312( . ) G01D 5/ 241( . ) G01B 7/ 004( . ) G01D 5/ 24( . ) (86) International application number: PCT/IB1997/001066 (87) International publication number: WO 1998/017966 (30.04.1998 Gazette 1998/17)

(84) Designated Contracting States: DE FR GB NL (30) Priority: 17.10.1996 EP 19960202888 (71) Applicant: Koninklijke Philips Electronics N.V. 5621 BA Eindhoven (NL)	(72) Inventor: DE SAMBER, Mark, André NL-5656 AA Eindhoven (NL) (74) Representative: Koppen, Jan, et al  INTERNATIONAAL OCTROOIBUREAU B.V., Prof. Holstlaan 6 5656 AA Eindhoven 5656 AA Eindhoven (NL)