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(11)

EP 4 584 575 A1

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(43) Date of publication: 16.07.2025 Bulletin 2025/29 (21) Application number: 23768237.2 (22) Date of filing: 06.09.2023

(51) International Patent Classification (IPC):  G01N 21/3504(2014.01) G02B 6/122(2006.01) G01N 21/552(2014.01) (52) Cooperative Patent Classification (CPC): G01N 21/552; G01N 21/3504; G02B 6/1225; G01N 33/004; G02B 2006/12097 (86) International application number: PCT/EP2023/074502 (87) International publication number: WO 2024/052427 (14.03.2024 Gazette 2024/11)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 06.09.2022 GB 202213015 (71) Applicant: Universitetet i Tromsø - Norges Arktiske Universitet N-9037 Tromsø (NO)	(72) Inventors: JÁGERSKÁ, Jana 9037 Tromsø (NO) VLK, Marek 9037 Tromsø (NO) MURUGAN, Ganapathy Senthil Southampton Optoelectronics Research Centre Southampton Hampshire SO17 1BJ (GB) SALAJ, Jehona 9037 Tromsø (NO) (74) Representative: Dehns  10 Old Bailey London EC4M 7NG London EC4M 7NG (GB)