(19)

(11)

EP 2 569 797 A2

(12)

(88) Date of publication A3: 26.04.2012 (43) Date of publication: 20.03.2013 Bulletin 2013/12 (21) Application number: 11720841.3 (22) Date of filing: 10.05.2011

(51) International Patent Classification (IPC):  H01J 5/52(2006.01) (86) International application number: PCT/GB2011/050895 (87) International publication number: WO 2011/141732 (17.11.2011 Gazette 2011/46)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 10.05.2010 GB 201007750 (71) Applicant: Fotolec Technologies Limited Fison Industrial Estate Thetford IP24 1JA (GB)	(72) Inventor: PAYNE, David Norwich Norfolk NR17 1NX (GB) (74) Representative: ip21 Ltd  Central Formalities Department Lakeside 300 Old Chapel Way Broadland Business Park Norwich Norfolk NR7 0WG Broadland Business Park Norwich Norfolk NR7 0WG (GB)