ILLUMINATION SYSTEM FOR AR METROLOGY TOOL

    公开(公告)号:US20240385075A1

    公开(公告)日:2024-11-21

    申请号:US18667513

    申请日:2024-05-17

    Abstract: Embodiments described herein provide for light engines of a measurement system and methods of using the light engines. The measurement system includes a light engine operable to illuminate a first grating of an optical device. The light engine projects a pattern with a light from a light engine. The light engine projects a pattern to the first grating such that a metrology metric may be extracted from one or more images captured by a detector of the measurement system. The metrology metrics are extracted by processing the image. The metrology metrics determine if the optical device meets image quality standards.

    FULL-FIELD METROLOGY TOOL FOR WAVEGUIDE COMBINERS AND META-SURFACES

    公开(公告)号:US20240310639A1

    公开(公告)日:2024-09-19

    申请号:US18675404

    申请日:2024-05-28

    CPC classification number: G02B27/0172 G02B27/0176

    Abstract: Metrology tools and methods of obtaining a full-field optical field of an optical device to determine multiple metrology metrics of the optical device are provided. A metrology tool is utilized to split a light beam into a first light path and a second light path. The first light path and the second light path are combined into a combined light beam and delivered to the detector. The detector measures the intensity of the combined light beam. A first equation and second equation are utilized in combination with the intensity measurements to determine an amplitude and phase ψ at a reference point directly adjacent to a second surface of the at least one optical device.

    METHODS TO REDUCE OPTICAL LOSS OF AN AR WAVEGUIDE

    公开(公告)号:US20240142693A1

    公开(公告)日:2024-05-02

    申请号:US18495409

    申请日:2023-10-26

    CPC classification number: G02B6/0065 G02B5/1852

    Abstract: Methods for modifying the interface of optical substrates. To achieve desirable optical properties, surface defects need to be removed from the interface layer. In one example, a substrate is exposed to an ion beam then a high temperature bake or laser annealing to correct the interface layer. In another example, a high energy ion beam can be used to remove the interface layer then a new interface layer can be added during a high temperature bake or laser annealing with a protective layer added last. If not removed surface defects in the interface layer may absorb a percentage of light in a single interaction. In a waveguide, light may bounce ten to hundreds of times inside a substrate causing significant light loss. Therefore, removing the surface defects significantly increases waveguide efficiency.

    INKJET GRADIENT INDEX MATERIAL TO MODULATE GRATING DIFFRACTION EFFICIENCY

    公开(公告)号:US20240142690A1

    公开(公告)日:2024-05-02

    申请号:US18473079

    申请日:2023-09-22

    Abstract: An apparatus for waveguides and a method of fabricating a waveguide combiner having at least one grating with trenches gap-filled with variable refractive index materials. At least two trenches of at least one grating includes a first gap-fill material having a first volume and a first refractive index, and a second gap-fill material having a second volume and a second refractive index different than the first refractive index. Control of the deposition of first volume and the deposition of second volume in an inkjet deposition process provide for the formation of the grating with two trenches that have different refractive indices and different gap-fill depths. The first gap-fill material and the second gap-fill material merge to form the gap-filler. Therefore, by controlling the varied refractive indices and different gap-fill depths the waveguide combiner is optimized by efficiency or a color uniformity.

    METHOD TO MEASURE LIGHT LOSS OF OPTICAL FILMS AND OPTICAL SUBSTRATES

    公开(公告)号:US20240125670A1

    公开(公告)日:2024-04-18

    申请号:US18397977

    申请日:2023-12-27

    CPC classification number: G01M11/0285 G01M11/0207

    Abstract: A method of optical device metrology is provided. The method includes introducing a first type of light into a first optical device during a first time period, the first optical device including an optical substrate and an optical film disposed on the optical substrate, the first optical device further including a first surface, a second surface, and one or more sides connecting the first surface with the second surface; and measuring, during the first time period, a quantity of the first type of light transmitted from a plurality of locations on the first surface or the second surface during the first time period, wherein the measuring is performed by a detector coupled to one or more fiber heads positioned to collect the light transmitted from the plurality of locations.

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