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    SYSTEMS FOR AND METHODS OF USING FOLD GRATINGS FOR DUAL AXIS EXPANSION
    1.
    发明申请
    SYSTEMS FOR AND METHODS OF USING FOLD GRATINGS FOR DUAL AXIS EXPANSION 有权

    公开(公告)号：US20220308352A1

    公开(公告)日：2022-09-29

    申请号：US17718147

    申请日：2022-04-11

    申请人： Rockwell Collins, Inc. ,  DIGILENS INC.

    发明人： James H. STANLEY ,  Jonathan David WALDERN ,  Milan Momcilo POPOVICH ,  Alastair John GRANT ,  Steven J. ROBBINS

    IPC分类号： G02B27/01 ,  G02B5/18 ,  G02B27/10

    摘要： A near eye optical display includes a waveguide comprising a first surface and a second surface, an input coupler, a fold grating, and an output grating. The input coupler is configured to receive collimated light from a display source and to cause the light to travel within the waveguide via total internal reflection between the first surface and the second surface to the fold grating; the fold grating is configured to provide pupil expansion in a first direction and to direct the light to the output grating via total internal reflection between the first surface and the second surface; and the output grating is configured to provide pupil expansion in a second direction different than the first direction and to cause the light to exit the waveguide from the first surface or the second surface.