公开(公告)号：US20250102742A1

公开(公告)日：2025-03-27

申请号：US18728210

申请日：2022-07-21

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Shreyas Potnis ,  Timothy Paul Bodiya ,  Ian Andrews

IPC: G02B6/42 ,  G02B27/01

Abstract: The present disclosure describes techniques and arrangements for directing light from an optical engine to one of a plurality of incouplers in a multiple incoupler waveguide system. For example, the present disclosure describes a plurality of reflective and transmissive elements to selectively direct light based on a plurality of optical characteristics to a first incoupler or a second incoupler.

公开(公告)号：US12248151B1

公开(公告)日：2025-03-11

申请号：US18538823

申请日：2023-12-13

Applicant: Google LLC

Inventor： Daniel Adema ,  Shreyas Potnis

IPC: G02B27/01

Abstract: Illustrative systems and methods for performing extended reality projection using monochrome pixel panels in inverted arrangements are described herein. For example, an extended reality projection system may include a binocular head-mounted display having a left side and a right side, a first set of monochrome pixel panels distributed in a first arrangement and collectively configured to produce a color image for presentation on the left side, and a second set of monochrome pixel panels distributed in a second arrangement and collectively configured to produce the color image for presentation on the right side. In this extended reality projection system, the second arrangement may be inverted from the first arrangement such that a color non-uniformity associated with the presentation on the right side is inverted from a color non-uniformity associated with the presentation on the left side. Corresponding methods and systems are also disclosed.

公开(公告)号：US20250035940A1

公开(公告)日：2025-01-30

申请号：US18713998

申请日：2022-11-21

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Ian Andrews

IPC: G02B27/01

Abstract: A WHUD includes an optical scanner having two scan mirrors and a multi-pass optical relay. The first scan mirror receives light emitted from an optical engine representative of one or more images. The first scan mirror oscillates in a first direction such that the received light is scanned in a first direction and provides the light scanned in the first direction to a multi-pass optical relay. The multi-pass optical relay then relays the light to a second scan mirror. The second scan mirror is configured to oscillate in a second direction such that the relayed light is scanned in both the first and second directions. The second scan mirror then provides the light scanned in the first and second directions back to the multi-pass optical relay which relays the light scanned in the first and second directions to an incoupler of a waveguide.

公开(公告)号：US20240329405A1

公开(公告)日：2024-10-03

申请号：US18620454

申请日：2024-03-28

Applicant: Google LLC

Inventor： Daniel Adema ,  Shreyas Potnis

IPC: G02B27/01 ,  G02B13/00

CPC classification number: G02B27/0172 ,  G02B13/0085 ,  G02B2027/0138 ,  G02B2027/0178

Abstract: Various configurations of projectors and cameras are disclosed that use shared wafer level optics, in which optical elements, e.g., microlenses, of a projector are fabricated on the same wafer as optical elements, e.g., microlenses, of a camera. Projectors and cameras can be mounted together on a mixed reality headset, e.g., an AR/VR headset, for example, as a feature of smart glasses. Some projectors and/or cameras can be co-located in the arm or temple of the glasses. Some projectors and/or cameras can be co-located near a center point of the frame of the glasses. Use of shared wafer-level optics provides a compact and efficient solution for simultaneously guiding light leaving a projector and light entering a camera.

公开(公告)号：US12092823B2

公开(公告)日：2024-09-17

申请号：US17204308

申请日：2021-03-17

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Stuart James Myron Nicholson ,  Ian Andrews

IPC: G02B27/01 ,  G02B17/08 ,  G02B26/10 ,  G02B27/00

CPC classification number: G02B27/0172 ,  G02B17/0816 ,  G02B26/101 ,  G02B27/0081 ,  G02B2027/0123 ,  G02B2027/0178

Abstract: A laser projection system utilizes a waveguide having a narrow incoupler for double-bounce mitigation and form factor reduction. An optical scanner includes an optical relay positioned in between two scan mirrors. The first scan mirror scans laser light into the optical relay in a first dimension, and the optical relay and converges the scanned laser light towards a second scan mirror. The second scan mirror scans laser light along a second dimension substantially perpendicular to a path over which the laser light is scanned across the second scan mirror, and the convergence introduced by the optical relay causes the laser light to be scanned as a line or arc path of an exit pupil plane that is coincident with the incoupler. The optical relay may include one or more lenses or may be a monolithic molded structure, which may be an Offner-style relay or a molded reflective relay.

公开(公告)号：US20240142704A1

公开(公告)日：2024-05-02

申请号：US18496257

申请日：2023-10-27

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Timothy Paul Bodiya ,  Rhys Anderson

IPC: G02B6/26 ,  G02B27/01

CPC classification number: G02B6/262 ,  G02B27/0172 ,  G02B1/18

Abstract: A lightguide formed from a single substrate includes a substrate and a plurality of reflective structures disposed on the substrate. These reflective structures form one or more incouplers, exit pupil expanders, and outcouplers of the lightguide and are each configured to reflect light representative of an image. The lightguide also includes an effectively transparent overmold material disposed over the reflective structures that, together with at least a portion of the substrate, forms a first surface of the substrate. Further, the lightguide includes a second surface formed by removing at least a portion of the substrate via a material removal operation.

公开(公告)号：US11906738B2

公开(公告)日：2024-02-20

申请号：US17204457

申请日：2021-03-17

Applicant: GOOGLE LLC

Inventor： Daniel Adema

IPC: G02B26/10 ,  G02B27/01 ,  G02B5/30 ,  G02B26/08 ,  G02B27/28 ,  G02C5/22

CPC classification number: G02B27/0172 ,  G02B5/3083 ,  G02B26/0833 ,  G02B26/10 ,  G02B27/283 ,  G02B2027/0178 ,  G02C5/22

Abstract: Systems and methods for manipulation of the polarization state of light emitted by a laser projector to reduce the angle range of a scanning mirror articulated by a micro-electromechanical system MEMS to reduce power consumption are disclosed. A system includes a light source configured to emit laser light, a scanning mirror, and an angle expander disposed between the light source and the scanning mirror, the angle expander being configured to cause the laser light from the light source to be reflected at least once from the angle expander and at least twice from the scanning mirror.

公开(公告)号：US20230324712A1

公开(公告)日：2023-10-12

申请号：US18297394

申请日：2023-04-07

Applicant: Google LLC

Inventor： Daniel Adema ,  Timothy Paul Bodiya

IPC: G02C5/16 ,  G02C13/00 ,  G02B27/01

CPC classification number: G02C5/16 ,  G02C13/001 ,  G02B27/017 ,  G02B2027/0178

Abstract: Improved augmented reality smartglasses ensure alignment of displays in a head-mounted wearable device such as AR smartglasses by specifying a relationship between material properties of the frame at the shoulder and nose bridge. For example, such a material relationship may be a rigidity and/or stiffness characteristic. In some implementations, the specified relationship is that a difference between the first bending stiffness and the second bending stiffness is less than a tolerance (e.g., 5%, 1%, or less than 1%).

公开(公告)号：US20230066767A1

公开(公告)日：2023-03-02

申请号：US17464240

申请日：2021-09-01

Applicant: GOOGLE LLC

Inventor： Daniel Adema

IPC: G02B27/01 ,  F21V8/00

Abstract: Systems and methods to reduce diffraction-angle effects, such as instances of double-bounces and bounce separation spacing effects in a laser projection system including an optical engine with laser diodes configured to emit light beams of different wavelengths and a beam combiner having a reflective surfaces each configured to receive one of the light beams from one of the laser diodes and to reflect the received light beam such that an edge of the reflected light beam lies on a tangent common to the other light beams reflected from the other reflective surfaces. The laser projection system may be implemented in head-mounted display (HMD) including a waveguide having an incoupler to receive the combined light beam, where an edge of the incoupler corresponds to the tangent on which the edges of the plurality of light beams are aligned.

公开(公告)号：US20230047415A1

公开(公告)日：2023-02-16

申请号：US17399566

申请日：2021-08-11

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Vance R. Morrison

IPC: G02B27/10 ,  G02B26/10 ,  G02B27/12

Abstract: A laser projection system is provided that includes at least one pickoff element or pickoff interface that redirects a portion of input laser light toward one or more photodetectors for purposes such as laser output power monitoring. An interface of a given pickoff element or a given pickoff interface uses Fresnel reflection to redirect the input laser light. The Fresnel reflection occurs due to a difference in indices of refraction between two materials that meet to form that interface. In some embodiments, a pickoff element is disposed in an optical path between a beam combiner and an optical scanner of the system. The pickoff element can be a plate beamsplitter, a cube beamsplitter, or a prism. In some embodiments, at least one pickoff interface is provided between two or more substrates of the beam combiner, the substrates that form a given pickoff interface having different respective indices of refraction.