(19)

(11)

EP 2 912 512 A1

(12)

(43) Date of publication: 02.09.2015 Bulletin 2015/36 (21) Application number: 13851247.0 (22) Date of filing: 29.10.2013

(51) International Patent Classification (IPC):  G02B 21/14(2006.01) G02B 21/00(2006.01) (86) International application number: PCT/SE2013/051257 (87) International publication number: WO 2014/070082 (08.05.2014 Gazette 2014/19)

(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 Designated Extension States: BA ME (30) Priority: 29.10.2012 US 201213663069 (71) Applicant: General Electric Company Schenectady, New York 12345 (US)	(72) Inventors: KIM, Evgenia, Mikhailovna Niskayuna, New York 12309 (US) YAZDANFAR, Siavash Niskayuna, New York 12309 (US) DYLOV, Dmitry, Vladimirovich Niskayuna, New York 12309 (US) (74) Representative: Serjeants LLP  Dock 75 Exploration Drive Leicester, LE4 5NU Leicester, LE4 5NU (GB)