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    Beam expander and beam expansion method
    125.
    发明授权
    Beam expander and beam expansion method 有权

    公开(公告)号：US11886022B2

    公开(公告)日：2024-01-30

    申请号：US17520251

    申请日：2021-11-05

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Aleksander V. Morozov ,  Sergey E. Dubynin ,  German B. Dubinin ,  Chilsung Choi ,  Hongseok Lee ,  Hoon Song

    IPC: G02B6/42 ,  G02B6/34 ,  G02B6/13

    CPC classification number: G02B6/4214 ,  G02B6/13 ,  G02B6/34 ,  G02B6/4206 ,  G02B6/4207

    Abstract: There is provided a beam expander including a first optical element, a second optical element, a composite waveguide including a plurality of waveguide elements, and a dichroic coating provided between the plurality of waveguide elements. The first optical element inputs a collimated incident beam from the outside into the composite waveguide, and the second optical element outputs, from the composite waveguide, collimated incident beam, input to the composite waveguide, wherein the collimated incident beam input into the composite waveguide is divided into multiple wavefronts by the dichroic coating, and the multiple wavefronts are mixed by total internal reflection in the composite waveguide. When the beam expander is used, coherency and collimation of an output beam may be maintained and speckles may be reduced or eliminated while improving the efficiency of an optical system.

    Light combiner and augmented reality device including the same
    130.
    发明授权
    Light combiner and augmented reality device including the same 有权

    公开(公告)号：US11747625B2

    公开(公告)日：2023-09-05

    申请号：US17338954

    申请日：2021-06-04

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Sunil Kim ,  Wontaek Seo ,  Geeyoung Sung ,  Hoon Song ,  Hongseok Lee

    IPC: G02B27/01

    CPC classification number: G02B27/0172 ,  G02B2027/0174

    Abstract: A light combiner combines first light provided by a light source with second light containing an image of an exterior environment and provides the combined light to a user. The light combiner includes a transmissive optical device comprising a first surface on which the first light is incident and a second surface facing the first surface, and branching the first light in a plurality of directions to pass through the second surface, and a holographic optical device on a side of the transmissive optical device facing the second surface and spaced apart from the transmissive optical device. The holographic optical device diffracts light rays branched and transmitted by the transmissive optical device in the plurality of directions, to be respectively focused at a plurality of focal points different from each other and corresponding to the directions, and transmits the second light therethrough to travel toward the plurality of focal points.

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