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41.发明申请公开(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.
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42.发明申请公开(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
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：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.
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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
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.
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公开(公告)号：US20240295742A1
公开(公告)日：2024-09-05
申请号：US18647361
申请日：2024-04-26
Applicant: GOOGLE LLC
Inventor： Daniel Adema , Sangtak Park
CPC classification number: G02B27/0916 , G02B26/0833 , G02B26/0841 , G02B26/101 , G02B27/0172 , G02B27/0955 , G02B27/0966 , G02B2027/0154 , G02B2027/0178
Abstract: Optical systems may include MEMS mirrors having elliptical mirror plates. A laser scanning system may include a MEMS mirror that scans an incident light beam along a single scanning axis. The MEMS mirror may include an elliptical mirror plate having a semi-major axis that is aligned parallel or perpendicular to the rotational axis of the elliptical mirror plate. The incident light beam may have an elliptical cross-section, such that the incident light beam completely or substantially overlaps the reflecting surface of the elliptical mirror plate. After being reflected by the elliptical mirror plate, the light beam may be circularized via one or more shaping lenses disposed in the optical path of the reflected light beam, prior to projection of the light beam.
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Patent Agency Ranking
公开(公告)号：US11971556B2
公开(公告)日：2024-04-30
申请号：US17201804
申请日：2021-03-15
Applicant: GOOGLE LLC
Inventor： Daniel Adema , Sangtak Park
CPC classification number: G02B27/0916 , G02B26/0833 , G02B26/0841 , G02B26/101 , G02B27/0172 , G02B27/0955 , G02B27/0966 , G02B2027/0154 , G02B2027/0178
Abstract: Optical systems may include MEMS mirrors having elliptical mirror plates. A laser scanning system may include a MEMS mirror that scans an incident light beam along a single scanning axis. The MEMS mirror may include an elliptical mirror plate having a semi-major axis that is aligned parallel or perpendicular to the rotational axis of the elliptical mirror plate. The incident light beam may have an elliptical cross-section, such that the incident light beam completely or substantially overlaps the reflecting surface of the elliptical mirror plate. After being reflected by the elliptical mirror plate, the light beam may be circularized via one or more shaping lenses disposed in the optical path of the reflected light beam, prior to projection of the light beam.
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公开(公告)号：US20240126089A1
公开(公告)日：2024-04-18
申请号：US18484835
申请日：2023-10-11
Applicant: GOOGLE LLC
Inventor： Daniel Adema , Timothy Paul Bodiya
IPC: G02B27/01
CPC classification number: G02B27/0172
Abstract: A waveguide includes an outcoupler with a dual reflective facet configuration. The dual reflective facet configuration includes a first set of reflective facets to receive light from a first direction and reflect the light incident thereon to an outcoupling direction. The dual reflective facet configuration also includes a second set of reflective facets to receive light from a second direction and reflect the light incident thereon to the outcoupling direction.
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公开(公告)号：US20240012245A1
公开(公告)日：2024-01-11
申请号：US18035563
申请日：2020-12-18
Applicant: GOOGLE LLC
Inventor： Daniel Adema , Stuart James Myron Nicholson
IPC: G02B27/01
CPC classification number: G02B27/0172 , G02B2027/0178 , G02B2027/0138 , G02B2027/014
Abstract: A head wearable apparatus, such as a pair of smart glasses are configured to track a gaze direction of a person for various applications. To support the tracking, the head wearable apparatus is configured with a lens assembly including at least one lens module (e.g., a lens or a lenslet array) operably coupled to the head wearable apparatus and a camera assembly including a camera sensor operably coupled to the head wearable apparatus. The head wearable apparatus is also configured with a camera assembly operably coupled to an anterior surface of a flexure of the head wearable apparatus (e.g., proximate to the front of the smart glasses frames) to minimize a size (e.g., to be as small as possible) of an aperture housing the camera assembly. The flexure is configured to be adjacent to the lens assembly operably coupled to the head wearable apparatus.
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公开(公告)号：US20230324703A1
公开(公告)日：2023-10-12
申请号：US18297372
申请日：2023-04-07
Applicant: Google LLC
Inventor： Daniel Adema , Timothy Paul Bodiya
CPC classification number: G02B27/0179 , G02B27/0172 , G02B6/0055 , G02B6/0056 , G06F3/013 , G09G3/002 , G02B2027/0178 , G02B2027/0187 , G09G2354/00
Abstract: Improved systems ensuring an accuracy of eye gaze measurements in an augmented reality head-mounted wearable device include a radiation direction rerouter (e.g., a partial retroreflector) configured to adjust an angle of incidence of the radiation in the waveguide at a first surface of a waveguide to produce radiation directed at an adjusted angle of incidence at an outcoupler such that the output direction is essentially parallel to the gaze angle of the user's eye. For example, a partial retroreflector may be disposed on a surface of the waveguide opposite the outcoupler provides an additional reflection so that the gaze angle of the user's eye is matched to an angle of an image of the eye pupil onto a world-facing radiation detector (e.g., a camera).
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公开(公告)号：US11782276B2
公开(公告)日：2023-10-10
申请号：US17204451
申请日：2021-03-17
Applicant: GOOGLE LLC
Inventor： Daniel Adema , Timothy Paul Bodiya , Shreyas Potnis
CPC classification number: G02B27/0172 , G02B6/0023 , G02B6/0068 , G02B26/101 , G03B21/2033 , G02B2027/0118 , G02B2027/0178
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.
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