(19)

(11)

EP 1 149 286 A1

(12)

(43) Date of publication: 31.10.2001 Bulletin 2001/44 (21) Application number: 00900760.0 (22) Date of filing: 24.01.2000

(51) International Patent Classification (IPC)7: G01N 31/10, H01J 49/42 (86) International application number: PCT/IB0000/062 (87) International publication number: WO 0043/771 (27.07.2000 Gazette 2000/30)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 22.01.1999 CH 12599 25.01.1999 US 117205 P 28.05.1999 US 136416 P 21.06.1999 CH 114799 (71) Applicant: Thales Technologies, AG 8005 Zürich (CH)	(72) Inventors: CHEN, Peter CH-8044 Zürich (CH) HINDERLING, Christian CH-8057 Zürich (CH) (74) Representative: Troesch Scheidegger Werner AG  Schwäntenmos 14 8126 Zumikon 8126 Zumikon (CH)