(19)
(11)
EP 0 981 777 A1
(12)
(43)
Date of publication:
01.03.2000
Bulletin 2000/09
(21)
Application number:
98921612.2
(22)
Date of filing:
14.05.1998
(51)
International Patent Classification (IPC)
7
:
G02B
27/14
,
G02B
17/00
,
A01J
7/00
,
G01N
21/88
(86)
International application number:
PCT/GB9801/383
(87)
International publication number:
WO 9852/087
(
19.11.1998
Gazette 1998/46)
(84)
Designated Contracting States:
BE DE DK ES FR GB IE IT NL PT
(30)
Priority:
14.05.1997
GB 9709738
(71)
Applicant:
BTG INTERNATIONAL LIMITED
London EC4M 7SB (GB)
(72)
Inventors:
ROSS, David, William
Edinburgh EH10 7DZ (GB)
STIRLING, Hugh, Gerald
London SE3 7HU (GB)
(74)
Representative:
Bingham, Ian Mark
British Technology Group Ltd.,10 Fleet Place
London EC4M 7SB
London EC4M 7SB (GB)
(54)
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