(19)

(11)

EP 4 487 162 A1

(12)

(43) Date of publication: 08.01.2025 Bulletin 2025/02 (21) Application number: 22843502.0 (22) Date of filing: 29.11.2022

(51) International Patent Classification (IPC):  G02B 26/08(2006.01) B81B 3/00(2006.01) (52) Cooperative Patent Classification (CPC): G02B 26/0858; B81B 3/0072; B81B 2201/042; B81B 2203/0154 (86) International application number: PCT/US2022/051116 (87) International publication number: WO 2023/163775 (31.08.2023 Gazette 2023/35)

(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: 28.02.2022 US 202263268684 P 26.05.2022 US 202217804245 (71) Applicant: Microsoft Technology Licensing, LLC Redmond, WA 98052-6399 (US)	(72) Inventors: ONG, Xiao Chuan Redmond, Washington 98052-6399 (US) BARAN, Utku Redmond, Washington 98052-6399 (US) DAVIS, Wyatt Owen Redmond, Washington 98052-6399 (US) (74) Representative: CMS Cameron McKenna Nabarro Olswang LLP  Cannon Place 78 Cannon Street London EC4N 6AF London EC4N 6AF (GB)