(19)

(11)

EP 3 631 391 A1

(12)

(43) Date of publication: 08.04.2020 Bulletin 2020/15 (21) Application number: 18763860.6 (22) Date of filing: 05.03.2018

(51) International Patent Classification (IPC):  G01J 4/04(2006.01) G02B 5/30(2006.01) G01J 5/58(2006.01) G06K 9/20(2006.01) (86) International application number: PCT/US2018/020927 (87) International publication number: WO 2018/165027 (13.09.2018 Gazette 2018/37)

(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 Designated Validation States: KH MA MD TN (30) Priority: 06.03.2017 US 201715450948 (71) Applicant: POLARIS SENSOR TECHNOLOGIES, INC. Huntsville, AL 35801 (US)	(72) Inventors: AYCOCK, Todd Michael Huntsville, AL 35801 (US) CHENAULT, David B. Huntsville, AL 35801 (US) HANKS, Jonathan B. Huntsville, AL 35801 (US) HARCHANKO, John S. Huntsville, AL 35801 (US) (74) Representative: FRKelly  27 Clyde Road Dublin D04 F838 Dublin D04 F838 (IE)