(19)

(11)

EP 4 816 874 A2

(12)

(88) Date of publication A3: 18.09.2025 (43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24901792.2 (22) Date of filing: 26.11.2024

(51) International Patent Classification (IPC):  G02B 27/01(2006.01) (52) Cooperative Patent Classification (CPC): G02B 27/0172 (86) International application number: PCT/US2024/057401 (87) International publication number: WO 2025/159823 (31.07.2025 Gazette 2025/31)

(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: 30.11.2023 US 202363604419 P (71) Applicant: Meta Platforms Technologies, LLC Menlo Park, CA 94025 (US)	(72) Inventors: LI, Zhenye Menlo Park, California 94025 (US) WANG, Xuan Menlo Park, California 94025 (US) FENG, Xiayu Menlo Park, California 94025 (US) YANG, Yang Menlo Park, California 94025 (US) XU, Jian Menlo Park, California 94025 (US) (74) Representative: Murgitroyd & Company  165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)