公开(公告)号：US20210215868A1

公开(公告)日：2021-07-15

申请号：US17145364

申请日：2021-01-10

Applicant: GOOGLE LLC

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

IPC: F21V8/00

Abstract: An optical element for implementation in a heads-up display or other near-eye display system includes a lightguide and an incoupler optically coupled to the lightguide. The incoupler receives a display beam incident upon the lightguide at a first incidence position. The incoupler directs a first portion of the display beam into the lightguide to form an incoupled beam and causes a second portion to remain non-incoupled relative to the lightguide to form a non-incoupled beam. The optical element further includes a reflector to receive the non-incoupled beam and to reflect the non-incoupled beam towards the incoupler to form a reflected beam incident upon the incoupler at a second incidence position. The incoupler direct a corresponding portion of the reflected beam into the lightguide to form a further incoupled beam.

公开(公告)号：US20250130432A1

公开(公告)日：2025-04-24

申请号：US18921164

申请日：2024-10-21

Applicant: Google LLC

Inventor： Daniel Adema ,  Shreyas Potnis

IPC: G02B27/01

Abstract: According to an aspect, a method includes identifying a lens pitch associated with a wafer. The method further includes determining a projector pitch for a first projector and a second projector on the wafer based on the lens pitch. The method also includes selecting a portion of the wafer for a device based on the projector pitch.

公开(公告)号：US20250130431A1

公开(公告)日：2025-04-24

申请号：US18919125

申请日：2024-10-17

Applicant: GOOGLE LLC

Inventor： Daniel Adema

IPC: G02B27/01

Abstract: According to an aspect, a system includes a first image source for a left eye and a second image source for a right eye. The system further includes at least one window in a first optical path for the first image source or a second optical path for the second image source, the at least one window configured to align first pixels from the first image source with second pixels from the second image source.

公开(公告)号：US12265230B2

公开(公告)日：2025-04-01

申请号：US17580309

申请日：2022-01-20

Applicant: GOOGLE LLC

Inventor： Daniel Adema

IPC: G02B27/10 ,  G02B26/08 ,  G02B26/10 ,  G02B27/01 ,  G02B27/14

Abstract: An optical engine of a display system includes first and second sets of laser light sources, which may be independently controllable, with laser light from each set of laser light sources being respectively combined to form first and second elliptical laser light beams. The first and second elliptical laser light beams may propagate along parallel or angularly separated optical paths prior to incidence at a scan mirror of an optical scanner of the system. In some embodiments, the first and second elliptical laser light beams are incident on separate regions of the reflective surface of the scan mirror. In some embodiments, the first and second elliptical laser light beams are incident on partially overlapping regions of the reflective surface of the scan mirror.

公开(公告)号：US12253669B2

公开(公告)日：2025-03-18

申请号：US17530782

申请日：2021-11-19

Applicant: GOOGLE LLC

Inventor： Daniel Adema

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

Abstract: A display system employs multiple micro-electromechanical system (MEMS) mirrors in series to receive collimated light and direct the light to provide light having input angles corresponding to a desired field of view at a point or line at an incoupler (IC) of a waveguide without an optical relay. An initial one or more MEMS mirrors accepts collimated light and generates the scan angles. A last MEMS mirror in the series scans at a range of angles proportional to the scan angles generated by the initial MEMS mirror(s) and directs the scanned light back to a spot or a line at the IC.

公开(公告)号：US12169277B2

公开(公告)日：2024-12-17

申请号：US17374078

申请日：2021-07-13

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Ian Andrews

IPC: G02B27/01 ,  G02B26/08 ,  G02B26/12

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 typically have different angles of incidence on a second scan mirror of the optical scanner. Respectively different levels of magnification are applied to the beam diameter of each of the angularly separated laser light beams in a first dimension, such that the angularly separated laser light beams have respectively different beam diameters upon incidence at the second scan mirror. In some embodiments, the different beam diameters of the angularly separated laser light beams result in regions of incidence of each of the angularly separated laser light beams on the second scan mirror being equal or substantially similar.

公开(公告)号：US20240154379A1

公开(公告)日：2024-05-09

申请号：US18272629

申请日：2021-01-21

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Timothy Paul Bodiya

IPC: H01S3/02 ,  G02B27/01 ,  G02B27/42 ,  H01S3/1055

CPC classification number: H01S3/025 ,  G02B27/0172 ,  G02B27/4205 ,  H01S3/1055

Abstract: Systems and methods related to optical engines and laser projectors usable in wearable heads-up displays are described. An optical engine may include laser diodes that are configured to output laser light beams and that are disposed in a fully or partially hermetically sealed, encapsulated package having an exit window. A holographic or surface-relief diffraction grating may be integrated with or disposed on a primary output surface of the exit window of an enclosure of the optical engine. The diffraction grating may be configured to redirect a portion of the laser light toward one or more photodetectors disposed at or across from one or more surfaces of the exit window that are not parallel with the primary output surface. The primary output surface of the exit window may be slanted to be non-orthogonal to the primary direction of propagation of the emitted laser light.

公开(公告)号：US20230228985A1

公开(公告)日：2023-07-20

申请号：US17578027

申请日：2022-01-18

Applicant: GOOGLE LLC

Inventor： Daniel Adema

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

CPC classification number: G02B26/0833 ,  G02B26/101 ,  G02B27/0172 ,  G02B27/0176 ,  G02B2027/0154 ,  G02B2027/0178

Abstract: A near-eye display system employs a low-amplitude, low-frequency micro-electromechanical system (MEMS) mirror in series with a higher-amplitude, higher-frequency resonant MEMS mirror to rotate at a reduced amplitude and frequency with respect to the resonant MEMS mirror redistribute illumination pulses or pixels at the extents of a sinusoidal angular scan pattern of the resonant MEMS mirror.

公开(公告)号：US20220299768A1

公开(公告)日：2022-09-22

申请号：US17481683

申请日：2021-09-22

Applicant: GOOGLE LLC

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

IPC: G02B27/01 ,  F21V8/00

Abstract: A head-mounted display (HMD) system includes a micro-display configured to project light beams, each of light beams encompassing a range of wavelengths different from each of the other light beams, and a waveguide having multiple incouplers configured to receive and direct light into the waveguide. Each of the incouplers is a diffraction grating with a fill factor different from each of the other incouplers. In some embodiments, each of the incouplers has a different period value from each of the other incouplers and the period value of each of the incouplers is based on the range of wavelengths of light each of the incouplers is configured to receive.

公开(公告)号：US20220299764A1

公开(公告)日：2022-09-22

申请号：US17204451

申请日：2021-03-17

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Timothy Paul Bodiya ,  Shreyas Potnis

IPC: G02B27/01 ,  G02B26/10 ,  F21V8/00 ,  G03B21/20

Abstract: Systems and methods to reduce light loss from a waveguide. The system includes a waveguide having an incoupler to direct light into the waveguide and a laser projector having laser diodes mounted to a substrate. The laser projector is configured to provide a plurality of laser light beams to the incoupler of the waveguide. The system further includes at least one alignment component configured to align the plurality of laser light beams tangent with an edge of the incoupler to minimize light lost from the waveguide through contact with the incoupler more than once.