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(11)

EP 4 449 183 A1

(12)

(43) Date of publication: 23.10.2024 Bulletin 2024/43 (21) Application number: 22847474.8 (22) Date of filing: 16.12.2022

(51) International Patent Classification (IPC):  G02B 27/00(2006.01) G02B 5/18(2006.01) G02B 27/09(2006.01) G02B 27/01(2006.01) (52) Cooperative Patent Classification (CPC): G02B 27/0172; G02B 2027/0178; G02B 27/0081; G02B 5/1842; G02B 5/1866; G02B 5/1857; G02B 2027/0125; G02B 2027/0116 (86) International application number: PCT/US2022/053105 (87) International publication number: WO 2023/114450 (22.06.2023 Gazette 2023/25)

(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: 16.12.2021 US 202163290083 P 26.04.2022 US 202217729169 (71) Applicant: Google LLC Mountain View, CA 94043 (US)	(72) Inventor: LOWNEY, Joseph, Daniel Mountain View, California 94043 (US) (74) Representative: Maikowski & Ninnemann Patentanwälte Partnerschaft mbB  Postfach 15 09 20 10671 Berlin 10671 Berlin (DE)