LIGHT GUIDE DISPLAY ASSEMBLY FOR PROVIDING EXPANDED FIELD OF VIEW

    公开(公告)号:WO2022046973A1

    公开(公告)日:2022-03-03

    申请号:PCT/US2021/047668

    申请日:2021-08-26

    Abstract: A device includes one or more light guides. The device also includes a first in-coupling element configured to couple a first light having a first input field of view ("FOV") into a first light guide, and a second in-coupling element configured to couple a second light having a second input FOV into a second light guide. The device also includes a first out-coupling element configured to couple the first light out of the first light guide as a first output light having a first output FOV, and a second out-coupling element configured to couple the second light out of the second light guide as a second output light having a second output FOV substantially non-overlapping with the first output FOV. A combination of the first output FOV and the second output FOV is larger than at least one of the first output FOV or the second output FOV.

    OPTICAL ASSEMBLIES HAVING POLARIZATION VOLUME GRATINGS FOR PROJECTING AUGMENTED REALITY CONTENT

    公开(公告)号:WO2020251758A1

    公开(公告)日:2020-12-17

    申请号:PCT/US2020/034754

    申请日:2020-05-27

    Abstract: An optical assembly for projecting light from a display includes a first optical waveguide, a reflective optical element configured, and a first in-coupler. The reflective optical element is configured to receive first light having first polarization from the display and to reflect the first light as second light having second polarization distinct from the first polarization. The first in-coupler is coupled with the first optical waveguide. The first in-coupler is configured to receive and transmit the first light. The first in-coupler is further configured to receive the second light and redirect a first portion of the second light so that the first portion of the second light undergoes total internal reflection inside the first optical waveguide.

    LOW-OBLIQUITY PUPIL RELAY FOR NEAR-EYE DISPLAY

    公开(公告)号:WO2021066992A1

    公开(公告)日:2021-04-08

    申请号:PCT/US2020/049072

    申请日:2020-09-02

    Abstract: A beam scanner for near-eye display includes a beam-folded pupil relay configured for receiving a light beam reflected from a tiltable reflector and relaying the light beam to an exit pupil while preserving the beam angle of the reflected beam. The beam-folding pupil relay includes a beamsplitter, e.g. a polarization beam splitter configured to redirect the beam to a curved reflector, which sends the beam towards the exit pupil. Polarization of the light beam reflected from the curved reflector may be changed to an orthogonal polarization by a waveplate disposed in an optical path of the light beam between the polarization beam splitter and the curved reflector, enabling the reflected light beam to propagate through the polarization beam splitter towards the exit pupil. A pupil-replicating waveguide may be disposed proximate the exit pupil. A 2D tiltable reflector or a pair of 1D tiltable reflectors may be used.

    APPARATUS AND METHODS FOR ALIGNING PHOTOPOLYMERS USING AN ASYMMETRICALLY FOCUSED BEAM

    公开(公告)号:WO2020167508A1

    公开(公告)日:2020-08-20

    申请号:PCT/US2020/016358

    申请日:2020-02-03

    Abstract: A method for aligning a layer of photopolymers includes projecting light onto a rotating optical element and asymmetrically focusing the light transmitted through the rotating optical element onto a layer of photopolymers. The asymmetrically focused light is swept across different regions of the layer of photopolymers while a direction of polarization in the light is varied due to the rotation of the first optical element, producing a pattern of orientations for the layer of photopolymers. The method can be incorporated in a raster-scanning process to produce an alignment pattern in a layer of photopolymers with a large surface area, and is faster and provides improved precision and/or uniformity of the alignment pattern compared to currently available methods. An apparatus for aligning the layer of photopolymers is also disclosed.

    WAVEPLATES ON A CURVED SURFACE AND FABRICATION METHOD THEREOF

    公开(公告)号:WO2020162929A1

    公开(公告)日:2020-08-13

    申请号:PCT/US2019/016880

    申请日:2019-02-06

    Abstract: An optical film fabrication method, an optical film and a head-mounted display are provided. The optical film fabrication method comprises: providing a substrate having a curved surface; dispensing a photo-alignment (PAM) layer on the curved surface of the substrate and exposing the PAM layer to spatially-uniformly polarized light; dispensing a birefringent material layer on the PAM layer; and curing the birefringent material layer to form a birefringent film on the curved surface. An optic axis orientation of birefringent material molecules in the birefringent film are spatially uniform across the birefringent film.

    EYE TRACKING BASED ON WAVEGUIDE IMAGING
    10.
    发明申请

    公开(公告)号:WO2019221875A1

    公开(公告)日:2019-11-21

    申请号:PCT/US2019/028452

    申请日:2019-04-22

    Abstract: An optical system includes an optical waveguide, and a first optical element configured to direct a first ray, having a first circular polarization and impinging on the first optical element at a first incidence angle, in a first direction so that the first ray propagates through the optical waveguide via total internal reflection toward a second optical element. The first optical element is configured to also direct a second ray, having a second circular polarization that is distinct from the first circular polarization and impinging on the first optical element at the first incidence angle, in a second direction that is distinct from the first direction so that the second ray propagates away from the second optical element. The second optical element is configured to direct the first ray propagating through the optical waveguide toward a detector.

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