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.

公开(公告)号：US20220269099A1

公开(公告)日：2022-08-25

申请号：US17581414

申请日：2022-01-21

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Ian Andrews

IPC: G02B27/28 ,  G02B26/10 ,  G02B26/08 ,  G02B17/02 ,  G02B27/01

Abstract: Systems and methods of separating the input light path from the output light path of a scanning mirror in a laser projector system while keeping the overall footprint of the laser projector system to a minimum. The system includes a scanning mirror, an optical engine, and an input/output (1/0) separator disposed between the optical engine and the scanning mirror to direct light from the optical engine towards the scanning mirror along an input path and to direct light reflected from the scanning mirror along an output path. The I/O separator, disposed to intersect both the input and output paths, can be implemented as a prism or a combination of a polarizing beam splitter and a quarter wave plate.

公开(公告)号：US20220269094A1

公开(公告)日：2022-08-25

申请号：US17580309

申请日：2022-01-20

Applicant: GOOGLE LLC

Inventor： Daniel Adema

IPC: G02B27/10 ,  G02B26/10 ,  G02B26/08 ,  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：US20220269077A1

公开(公告)日：2022-08-25

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 ,  G02B26/10 ,  G02B27/00 ,  G02B17/08

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：US11262585B2

公开(公告)日：2022-03-01

申请号：US16671312

申请日：2019-11-01

Applicant: GOOGLE LLC

Inventor： Shreyas Potnis ,  Daniel Adema ,  Timothy Paul Bodiya

IPC: G02B27/01 ,  G02B27/14 ,  F21V8/00 ,  G02B6/00

Abstract: An optical combiner lens includes a lens and a lightguide with a gap defined between the lens and the lightguide. Spacers are disposed in the gap to maintain the gap at a set height. A method of making the optical combiner lens and a wearable heads-up display including the optical combiner lens are disclosed.

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

IPC: G02B27/01 ,  F21V8/00

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.

公开(公告)号：US20250093568A1

公开(公告)日：2025-03-20

申请号：US18728360

申请日：2022-07-21

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Shreyas Potnis ,  Timothy Paul Bodiya

IPC: F21V8/00

Abstract: The present disclosure describes techniques for reflecting light incoupled into a waveguide in a direction away from the outcoupler back toward the outcoupler. The waveguide includes an incoupler to incouple light of a first polarization state, and a reflective structure to receive incoupled light of the first polarization state and reflect it with a second polarization state toward the outcoupler. The reflective structure is on an opposite side of the incoupler as the outcoupler. In some embodiments, a polarization beam splitter or other polarization-selective layer is included at an interface of the incoupler and a waveguide substrate of the waveguide to transmit light of the first polarization state and reflect light of the second polarization state.

公开(公告)号：US20250020932A1

公开(公告)日：2025-01-16

申请号：US18884710

申请日：2024-09-13

Applicant: GOOGLE LLC

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

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

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：US20240411138A1

公开(公告)日：2024-12-12

申请号：US18717960

申请日：2022-11-21

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Syed Moez Haque ,  Thuy Hong Nguyen ,  Brian Watson Cranton ,  Lloyd Frederick Holland

IPC: G02B27/01

Abstract: The present disclosure describes tinting techniques in a lens stack assembly for a wearable head mounted display (WHMD). The lens stack assembly includes a waveguide disposed between two lenses, where the two lenses include tints to selectively reduce the amount of ambient light transmitted to the user while not reducing the amount of the display light in the WHMD. In addition, the tinting techniques described herein reduce or eliminate the generation of ghost images resulting from the reflection of outcoupled light from the waveguide away from the user back toward the user.

公开(公告)号：US20240319417A1

公开(公告)日：2024-09-26

申请号：US18574956

申请日：2022-06-30

Applicant: GOOGLE LLC

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

IPC: G02B5/18 ,  G02B6/124 ,  G02B27/00 ,  G02B27/01

CPC classification number: G02B5/1809 ,  G02B5/1819 ,  G02B5/1842 ,  G02B6/124 ,  G02B27/0081 ,  G02B27/0172 ,  G02B2027/0178

Abstract: A head-mounted display system (100) includes a lens element (110) supported by a support structure (102). The lens element (110) includes a waveguide (212) to couple light from an image source. The waveguide (212) includes a waveguide surface (207) and a grating (250). The grating (250) is disposed onto the waveguide surface (207) and includes rows of three-dimensional, 3D, primitive structures (435), with a height of the 3D primitive structures being smaller than a wavelength of visible incident light at a surface of the sub-wavelength grating.