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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.
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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
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.
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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
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.
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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
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.
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5.发明申请公开(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
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.
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Patent Agency Ranking
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
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.
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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.
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8.发明授权公开(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
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.
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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：US12276792B2
公开(公告)日：2025-04-15
申请号：US17854825
申请日：2022-06-30
Applicant: GOOGLE LLC
Inventor： Syed Moez Haque , Shreyas Potnis , Ali Karbasi , Timothy Paul Bodiya , Daniel Adema , Ian Andrews
Abstract: A head-mounted display (HMD) system includes a lens element supported by a support structure. The lens element includes a waveguide that includes an incoupler, an outcoupler, and an exit pupil expander. The incoupler is disposed within a first area of the waveguide. The outcoupler is disposed within a second area of the waveguide. The exit pupil expander is disposed within a third area of the waveguide. An anti-reflection coating is formed via fabrication used to form the incoupler, the outcoupler, and the exit pupil expander. The anti-reflection coating is disposed within a fourth area of the waveguide different than the first, second, and third areas of the waveguide.
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