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(11)

EP 4 423 556 A2

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(88) Date of publication A3: 13.07.2023 (43) Date of publication: 04.09.2024 Bulletin 2024/36 (21) Application number: 22887820.3 (22) Date of filing: 27.10.2022

(51) International Patent Classification (IPC):  G02B 21/06(2006.01) G02B 21/18(2006.01) (52) Cooperative Patent Classification (CPC): G02B 21/0076; G02B 21/06; G02B 21/10 (86) International application number: PCT/SG2022/050771 (87) International publication number: WO 2023/075695 (04.05.2023 Gazette 2023/18)

(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: 29.10.2021 SG 10202112066Q (71) Applicant: Agency for Science, Technology and Research Singapore 138632 (SG)

(72) Inventors: YONG, Si Kai Alexander Singapore 138669 (SG) LIANG, Kaicheng Singapore 138669 (SG) SOH, Hui Kie Rachael Singapore 138669 (SG) TAN, Jia Jun Cyrus Singapore 138669 (SG) KNG, Sze Jia Jessica Singapore 138669 (SG) TAN, Yi Xuan Rachel Singapore 138669 (SG) (74) Representative: Feder Walter Ebert  Partnerschaft von Patentanwälten mbB Achenbachstrasse 59 40237 Düsseldorf 40237 Düsseldorf (DE)