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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
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.
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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
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.
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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
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%).
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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
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.
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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
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.
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Patent Agency Ranking
公开(公告)号：US11445155B1
公开(公告)日：2022-09-13
申请号：US17208810
申请日：2021-03-22
Applicant: GOOGLE LLC
Inventor： Daniel Adema , Ian Andrews
Abstract: Display systems, such as near eye display systems or wearable heads up displays, may include a laser projection system having an optical engine and an optical scanner. Light output by the optical engine may be directed into the optical scanner as two angularly separated laser light beams. The angularly separated laser light beams may overlap at an entrance pupil plane along a first dimension at a first scan mirror of the optical scanner, or at a location between the first scan mirror and an optical relay of the optical scanner. The angularly separated laser light beams may overlap at an exit pupil plane along the first dimension at a second scan mirror of the optical scanner or at an incoupler of the laser projection system.
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公开(公告)号：US20220269084A1
公开(公告)日：2022-08-25
申请号：US17580749
申请日：2022-01-21
Applicant: GOOGLE LLC
Inventor： Daniel Adema , Stuart James Myron Nicholson
Abstract: Systems, devices, and methods for accommodating multiple sets of laser light sources in an optical engine of a display system such as a laser projection system are described. Laser light beams may be combined via wavelength-, polarization-, and/or angular-separation-based techniques. First and second sets of laser light beams may be angularly separated such that different sets of partially overlapping pixels are projected by the system, thereby increasing the display pixel density and/or an expanding the field of view of the display. One or more laser die may be mounted to each submount of the optical engine. For embodiments with two laser dies on each submount, collimating lenses may introduce angular separation between laser light beams output by each pair of commonly mounted laser dies. A retroreflector prism may be disposed at a beam combiner to provide a compact extension of the optical path through the beam combiner.
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公开(公告)号：US20220269078A1
公开(公告)日：2022-08-25
申请号：US17212750
申请日：2021-03-25
Applicant: GOOGLE LLC
Inventor： Daniel Adema , Jaehong Choi
Abstract: An optical device includes a light guide (LG) attached to a support component. The LG receives a display light from a light engine, and directs a first portion of the display light out of the LG to form an outcoupled light. The LG also causes a second portion of the display light to become incident upon an outer perimeter of the LG at one or more LG regions of the LG to form one or more stray lights, respectively. The LG may be mechanically coupled to the support component at one or more coupling regions positioned outside of the one or more LG regions. A wearable heads-up display (WHUD) can incorporate the optical device.
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公开(公告)号：US20220163803A1
公开(公告)日：2022-05-26
申请号：US17531117
申请日：2021-11-19
Applicant: GOOGLE LLC
Inventor： Daniel Adema
Abstract: Display systems, such as near eye display systems or wearable heads up displays, may include a laser projector having an optical switch assembly disposed an at input to an optical scanner of the laser projector. The optical switch assembly includes at least one optical switch, and a controller selectively modifies the orientation of each optical switch to selectively change an angle at which laser light is directed onto a scan mirror of the optical scanner. Changing this angle shifts the scan region over which the scan mirror scans the laser light and, relatedly, shifts a region of a field of view of the display. In some embodiments, the controller is configured to modify the optical switch orientation(s) to correct non-idealities in the angle of the laser light.
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公开(公告)号：US12259552B2
公开(公告)日：2025-03-25
申请号：US17552721
申请日：2021-12-16
Applicant: GOOGLE LLC
Inventor： Daniel Adema , Timothy Paul Bodiya , Shreyas Potnis
Abstract: A head-mounted display (HMD) system including a lens element supported by a support structure, the lens element having a waveguide with an incoupler configured to receive light from an optical scanner of the HMD. The incoupler is configured with multiple features varying in at least one of height, spacing, angle, or density. The features may be separated into discrete zones along the incoupler such that at least one of height, spacing, angle, or density of the plurality of features is varied over the incoupler and constant within a given zone or the features may be varied continuously across the incoupler.
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