(19)

(11)

EP 2 008 083 A1

(12)

(43) Date of publication: 31.12.2008 Bulletin 2009/01 (21) Application number: 07732301.2 (22) Date of filing: 04.04.2007

(51) International Patent Classification (IPC):  G01N 21/53(2006.01) G02B 5/00(2006.01) G01N 15/02(2006.01) (86) International application number: PCT/GB2007/001253 (87) International publication number: WO 2007/113567 (11.10.2007 Gazette 2007/41)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 04.04.2006 GB 0606800 (71) Applicant: PCME LIMITED Cambridgeshire PE27 3GH (GB)	(72) Inventors: ROGERS, John Cambridge CB3 7HD (GB) RIGBY, Michael Cambridgeshire PE26 2PA (GB) (74) Representative: Critten, Matthew Peter  Abel & Imray 20 Red Lion Street London, WC1R 4PQ London, WC1R 4PQ (GB)