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(11)

EP 4 288 819 A1

(12)

(43) Date of publication: 13.12.2023 Bulletin 2023/50 (21) Application number: 22750542.7 (22) Date of filing: 07.02.2022

(51) International Patent Classification (IPC):  G02B 6/26(2006.01) G02B 6/28(2006.01) G02B 6/02(2006.01) G02B 6/30(2006.01) (52) Cooperative Patent Classification (CPC): G02B 6/30; G02B 6/2804 (86) International application number: PCT/US2022/015518 (87) International publication number: WO 2022/170205 (11.08.2022 Gazette 2022/32)

(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: 08.02.2021 US 202163147128 P 06.07.2021 US 202163203052 P 25.10.2021 US 202117452173 (71) Applicant: Chiral Photonics, Inc. Pine Brook, NJ 07058 (US)	(72) Inventors: KOPP, Victor, Il'ich Pine Brook, New Jersey 07058 (US) PARK, Jongchul Pine Brook, New Jersey 07058 (US) NEUGROSCHL, Daniel Pine Brook, New Jersey 07058 (US) (74) Representative: f & e patent  Braunsberger Feld 29 51429 Bergisch Gladbach 51429 Bergisch Gladbach (DE)