Multifocal optics for light field displays

Kai Ojala (Inventor), Jukka-Tapani Mäkinen (Inventor)

    Research output: PatentPatent application


    A 3D light field display device may include an array of light-emitting elements configured to emit light, an array of multifocal lenses configured to focus the light from the array of light-emitting elements, each of the multifocal lenses having two or more portions, different portions being configured to focus the light to different distances, and a spatial light modulator (SLM) configured to control the portion of the lens upon which the light falls. The device may include an array of collimating optical elements for collimating the emitted light. Each multifocal lens may be annular in shape and configured to focus the light to different distances. The SLM may include a plurality of pixels that each correspond to a portion of a multifocal lens. The SLM may control which portion of a multifocal lens the light falls to select a focal distance for the light.
    Original languageEnglish
    Patent numberWO2019164745 A1
    IPCH04N 13/307 ,G02B 27/22,G02B 27/00 ,G02B 27/01
    Priority date20/02/18
    Filing date14/02/19
    Publication statusPublished - 29 Aug 2019
    MoE publication typeNot Eligible


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