公开(公告)号：WO2023081502A1

公开(公告)日：2023-05-11

申请号：PCT/US2022/049239

申请日：2022-11-08

申请人： META PLATFORMS TECHNOLOGIES, LLC

发明人： GOLLIER, Jacques ,  WHEELWRIGHT, Brian ,  GAO, Weichuan ,  GENG, Ying ,  SOHN, Alexander ,  TU, Xingzhou

IPC分类号： G02B27/01 ,  G02B3/08

摘要： A system includes a light outputting device configured to output a divergent light. The system also includes a lens configured to convert the divergent light incident thereon from a first side of the lens to a collimated light substantially covering a light receiving region located at a second side of the lens, the lens including a plurality of Fresnel structures formed on at least one of a first lens surface or a second lens surface of the lens. Each Fresnel structure includes a slope facet and a draft facet. At least one of the draft facets is a first type of draft facet configured to not interact with a ray of the divergent light that is non-parallel with the at least one of the draft facets.