公开(公告)号：WO2022197339A1

公开(公告)日：2022-09-22

申请号：PCT/US2021/062996

申请日：2021-12-13

Applicant: APPLE INC.

Inventor： SOSKIND, Yakov G. ,  SHPUNT, Alexander ,  TOWNSEND, Graham C.

IPC: G02F1/225 ,  G02F1/29

Abstract: An optical transmission device (30, 80, 90) includes a waveguide (50, 92) including a transparent medium (52) having mutually-parallel first and second surfaces arranged so that light propagates within the waveguide by internal reflection between the first and second surfaces. At least one light source (58) is configured to inject coherent light into the waveguide. A first array of diffractive structures (64, 96) is applied to the waveguide and configured to couple respective beams (66) of the coherent light out through the first surface of the waveguide. The device includes a second array of tunable optical phase modulators (70), which are overlaid on respective ones of the diffractive structures in the first array and are configured to apply different respective phase shifts to the respective beams, thereby modulating a far-field light pattern (31) formed by interference between the beams.