DIFFRACTION GRATINGS FORMED BY METASURFACES HAVING DIFFERENTLY ORIENTED NANOBEAMS

    公开(公告)号:US20180231702A1

    公开(公告)日:2018-08-16

    申请号:US15880404

    申请日:2018-01-25

    Abstract: Metasurfaces provide compact optical elements in head-mounted display systems to, e.g., incouple light into or outcouple light out of a waveguide. The metasurfaces may be formed by a plurality of repeating unit cells, each unit cell comprising two sets or more of nanobeams elongated in crossing directions: one or more first nanobeams elongated in a first direction and a plurality of second nanobeams elongated in a second direction. As seen in a top-down view, the first direction may be along a y-axis, and the second direction may be along an x-axis. The unit cells may have a periodicity in the range of 10 nm to 1 μm, including 10 nm to 500 nm or 300 nm to 500 nm. Advantageously, the metasurfaces provide diffraction of light with high diffraction angles and high diffraction efficiencies over a broad range of incident angles and for incident light with circular polarization.

    ARCHITECTURES AND METHODS FOR OUTPUTTING DIFFERENT WAVELENGTH LIGHT OUT OF WAVEGUIDES
    135.
    发明申请
    ARCHITECTURES AND METHODS FOR OUTPUTTING DIFFERENT WAVELENGTH LIGHT OUT OF WAVEGUIDES 审中-公开
    用于输出波长不同波长光的结构和方法

    公开(公告)号:US20160116739A1

    公开(公告)日:2016-04-28

    申请号:US14869537

    申请日:2015-09-29

    Abstract: Architectures are provided for selectively outputting light for forming images, the light having different wavelengths and being outputted with low levels of crosstalk. In some embodiments, light is incoupled into a waveguide and deflected to propagate in different directions, depending on wavelength. The incoupled light then outcoupled by outcoupling optical elements that outcouple light based on the direction of propagation of the light. In some other embodiments, color filters are between a waveguide and outcoupling elements. The color filters limit the wavelengths of light that interact with and are outcoupled by the outcoupling elements. In yet other embodiments, a different waveguide is provided for each range of wavelengths to be outputted. Incoupling optical elements selectively incouple light of the appropriate range of wavelengths into a corresponding waveguide, from which the light is outcoupled.

    Abstract translation: 提供了用于选择性地输出用于形成图像的光的结构,具有不同波长的光并且以低等级的串扰输出。 在一些实施例中,取决于波长,光被耦合到波导中并被偏转以在不同的方向上传播。 所耦合的光然后通过耦合的光耦合器耦合,所述光学元件基于光的传播方向将光耦合出来。 在一些其它实施例中,滤色器位于波导和外耦合元件之间。 滤色器限制与外耦合元件相互作用并与外耦合的光的波长。 在其它实施例中,为要输出的每个波长范围提供不同的波导。 耦合光学元件选择性地将适当范围的波长的光耦合到相应的波导中,光从该波导中耦合出来。

    AUGMENTED REALITY DISPLAY WITH WAVEGUIDE CONFIGURED TO CAPTURE IMAGES OF EYE AND/OR ENVIRONMENT

    公开(公告)号:US20250155722A1

    公开(公告)日:2025-05-15

    申请号:US19028214

    申请日:2025-01-17

    Abstract: Head mounted display systems configured to project light to an eye of a user to display augmented reality image content in a vision field of the user are disclosed. In embodiments, the system includes a frame configured to be supported on a head of the user, an image projector configured to project images into the user's eye, a camera coupled to the frame, a waveguide optically coupled to the camera, an optical coupling optical element me, an out-coupling element configured to direct light emitted from the waveguide to the camera, and a first light source configured to direct light to the user's eye through the waveguide. Electronics control the camera to capture images periodically and farther control the first light source to pulse in time with the camera such that light emitted by the light source has a reduced intensity when the camera is not capturing images.

    Eyepieces for augmented reality display system

    公开(公告)号:US12181678B2

    公开(公告)日:2024-12-31

    申请号:US18296803

    申请日:2023-04-06

    Abstract: An augmented reality display system. The system can include a first eyepiece waveguide with a first input coupling grating (ICG) region. The first ICG region can receive a set of input beams of light corresponding to an input image having a corresponding field of view (FOV), and can in-couple a first subset of the input beams. The first subset of input beams can correspond to a first sub-portion of the FOV. The system can also include a second eyepiece waveguide with a second ICG region. The second ICG region can receive and in-couple at least a second subset of the input beams. The second subset of the input beams can correspond to a second sub-portion of the FOV. The first and second sub-portions of the FOV can be at least partially different but together include the complete FOV of the input image.

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