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    Optical systems with flare-mitigating angular filters
    1.
    发明授权
    Optical systems with flare-mitigating angular filters 有权

    公开(公告)号：US12228734B2

    公开(公告)日：2025-02-18

    申请号：US17476642

    申请日：2021-09-16

    Applicant: Apple Inc.

    Inventor： Jonathan B. Pfeiffer ,  Adam C. Urness

    IPC: G02B27/01 ,  G02B6/34

    Abstract: An electronic device may include a display with an optical combiner. The combiner may include a waveguide and a cross coupler on the waveguide. The combiner may redirect light from a display module to an eye box while passing world light to the eye box within a field of view. The cross coupler may include surface relief gratings or other broadband gratings. The combiner may include an angular filter that at least partially overlaps the cross coupler. The cross coupler may include surface relief grating structures or other broadband gratings. The angular filter may include angled absorbers or diffractive gratings. The angular filter may prevent world light that would otherwise produce distracting flares at the eye box (e.g., world light incident on the waveguide outside the field of view such as high-incident angle light from an overhead light source) from passing to the cross coupler.

    Optical Systems with Flare-Mitigating Angular Filters
    2.
    发明申请
    Optical Systems with Flare-Mitigating Angular Filters 有权

    公开(公告)号：US20220004006A1

    公开(公告)日：2022-01-06

    申请号：US17476642

    申请日：2021-09-16

    Applicant: Apple Inc.

    Inventor： Jonathan B. Pfeiffer ,  Adam C. Urness

    IPC: G02B27/01 ,  G02B6/34

    Abstract: An electronic device may include a display with an optical combiner. The combiner may include a waveguide and a cross coupler on the waveguide. The combiner may redirect light from a display module to an eye box while passing world light to the eye box within a field of view. The cross coupler may include surface relief gratings or other broadband gratings. The combiner may include an angular filter that at least partially overlaps the cross coupler. The cross coupler may include surface relief grating structures or other broadband gratings. The angular filter may include angled absorbers or diffractive gratings. The angular filter may prevent world light that would otherwise produce distracting flares at the eye box (e.g., world light incident on the waveguide outside the field of view such as high-incident angle light from an overhead light source) from passing to the cross coupler.

    Optical systems with holographic elements for producing uniform images
    3.
    发明授权
    Optical systems with holographic elements for producing uniform images 有权

    公开(公告)号：US12158581B1

    公开(公告)日：2024-12-03

    申请号：US17390535

    申请日：2021-07-30

    Applicant: Apple Inc.

    Inventor： Mark R. Ayres ,  Adam C. Urness ,  Jaebum Chung

    IPC: G02B27/01 ,  G02B5/32 ,  G03H1/02 ,  G03H1/04 ,  G03H1/08

    Abstract: An electronic device may provide images to an eye box. The device may include first and second sets of holograms that sequentially diffract light along an optical path. Each hologram in the first set may have a respective grating vector oriented along a common axis. Each of the grating vectors may have a respective magnitude. The magnitudes may be non-uniformly spaced across the first set of volume holograms. Similarly, each hologram in the second set may have a respective additional grating vector oriented along an additional common axis. Each of the additional grating vectors may have a respective additional magnitude. The additional magnitudes may be non-uniformly spaced across the second set of holograms. This may serve to produce diffracted light within filaments of k-space that mitigate angular harmonic sight lines in angle space, thereby preventing formation of non-uniformities in the images at the eye box.

    Optical Systems with Resolution-Enhancing Holographic Elements
    4.
    发明申请
    Optical Systems with Resolution-Enhancing Holographic Elements 有权

    公开(公告)号：US20210405380A1

    公开(公告)日：2021-12-30

    申请号：US17475080

    申请日：2021-09-14

    Applicant: Apple Inc.

    Inventor： Adam C. Urness ,  Byron R. Cocilovo ,  Jonathan B. Pfeiffer

    IPC: G02B27/01 ,  F21V8/00 ,  G03H1/02

    Abstract: An electronic device may include an optical system that redirects light from a display module towards an eye box along an optical path. The optical path may include a holographic coupler and a resolution-enhancing holographic element. The holographic element may include a first set of holograms and the coupler may include a second set of holograms. The first set of holograms may be characterized by a first set of selectivity curves having first primary lobes. The second set of holograms may be characterized by a second set of selectivity curves having second primary lobes that overlap the first primary lobes. This may configure the holographic element to narrow the second selectivity curves by diffracting some of the light out of the optical path, thereby optimizing the resolution of images in the light provided to the eye box.

    Optical Systems with Light-Expanding Couplers
    6.
    发明申请
    Optical Systems with Light-Expanding Couplers 有权

    公开(公告)号：US20220066204A1

    公开(公告)日：2022-03-03

    申请号：US17423196

    申请日：2020-05-26

    Applicant: Apple Inc.

    Inventor： Jonathan B. Pfeiffer ,  Francesco Aieta ,  Se Baek Oh ,  Friso Schlottau ,  Adam C. Urness

    IPC: G02B27/00 ,  G02B5/18 ,  G02B5/32 ,  G02B27/01 ,  F21V8/00

    Abstract: An electronic device may include a display that generates light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide, a non-diffractive input coupler, a cross coupler, and an output coupler. The cross coupler may expand the light in a first direction. The cross coupler may perform an even number of diffractions on the light and may couple the light back into the waveguide at an angle suitable for total internal reflection. The output coupler may expand the light in a second direction while coupling the light out of the waveguide. The cross coupler may include surface relief gratings or holographic gratings embedded within the waveguide or formed in a separate substrate. The optical system may direct the light towards the eye box without chromatic dispersion and while supporting an expanded field of view and optical bandwidth.

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