(19)

(11)

EP 4 816 871 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24809247.0 (22) Date of filing: 13.11.2024

(51) International Patent Classification (IPC):  G02B 27/01(2006.01) G02B 6/00(2006.01) G02B 27/00(2006.01) F21V 8/00(2006.01) (52) Cooperative Patent Classification (CPC): G02B 27/0172; G02B 2027/0178; G02B 2027/0138; G02B 2027/0187; G02B 27/0093; G02B 6/0045; G02B 6/0046 (86) International application number: PCT/EP2024/082130 (87) International publication number: WO 2025/113997 (05.06.2025 Gazette 2025/23)

(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: GE KH MA MD TN (30) Priority: 27.11.2023 GB 202318049 (71) Applicant: TruLife Optics Limited London E14 0FR (GB)	(72) Inventor: VOLKOV, Andrii London Greater London E14 0FR (GB) (74) Representative: Crawford, Andrew  TruLife Optics Ltd Fittingshop Building 79 Trinity Buoy Wharf London E14 0FR London E14 0FR (GB)