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1.发明公开公开(公告)号：US20240361598A1
公开(公告)日：2024-10-31
申请号：US18139603
申请日：2023-04-26
Applicant: GOOGLE LLC
Inventor： Qinglan Huang , Wei Jin , Joseph Daniel Lowney
IPC: G02B27/01
CPC classification number: G02B27/0172 , G02B2027/0178
Abstract: Methods and apparatuses for applying anti-reflective structures to a waveguide of an augmented reality display device include producing two initial molds: one formed with high precision for diffractive optical structures, and one formed with lower precision for anti-reflective structures. The two initial molds are imprinted into a single resist layer to form an integrated mold, which is then usable to simultaneously form both diffractive optical structures and anti-reflective structures. Accordingly, the cost of producing the anti-reflective structures is minimized while the efficiency of forming the diffractive optical structures and anti-reflective structures is maximized.
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2.发明公开公开(公告)号：US20240231100A9
公开(公告)日：2024-07-11
申请号：US18372222
申请日：2023-09-25
Applicant: GOOGLE LLC
Inventor： Wei Jin , Joseph Daniel Lowney , Lu Tian , Qinglan Huang , Thomas Mercier
CPC classification number: G02B27/0172 , G02B6/34 , G02B2027/0178
Abstract: An augmented-reality (AR) eyewear display utilizes an optical waveguide having multi-layered optical gratings in a repeating arrangement. The optical gratings include varying depths, slope angles, lengths, and/or widths in order to tune the gratings to provide an improved AR eyewear display. By using the different configurations of two-dimensional or three-dimensional gratings disclosed herein in a waveguide of an AR eyewear display, optical characteristics of the waveguide are optimized to provide, e.g., high resolution and/or contrast, high display uniformity, high input coupling efficiency, and/or high output coupling efficiency. Accordingly, in some embodiments, aspects of the present disclosure enable lower-power AR eyewear displays to produce the same quality of display of a higher-power conventional AR eyewear display waveguide.
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公开(公告)号：US20250020839A1
公开(公告)日：2025-01-16
申请号：US18221692
申请日：2023-07-13
Applicant: GOOGLE LLC
Inventor： Qinglan Huang
Abstract: A method of simulating the optical performance of a diffractive waveguide includes, generating a plurality of transfer matrices for each diffractive grating of the plurality of diffractive gratings responsive to performing a diffraction modeling process for a plurality of diffractive gratings of the waveguide based on a plurality of input light rays each having at least a different first characteristic. A plurality of electric fields at outcoupling positions of an outcoupling grating of the plurality of diffractive gratings is determined based on the plurality of transfer matrices responsive to performing a ray tracing process for multiple instances of each input light ray of the plurality of light rays with at least a different second characteristic. A uniformity map is generated for the waveguide based on the plurality of electric fields. The uniformity map indicates a uniformity of one or more characteristics of the waveguide across different sampled pupil positions.
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4.发明公开公开(公告)号：US20240134198A1
公开(公告)日：2024-04-25
申请号：US18372222
申请日：2023-09-24
Applicant: GOOGLE LLC
Inventor： Wei Jin , Joseph Daniel Lowney , Lu Tian , Qinglan Huang , Thomas Mercier
CPC classification number: G02B27/0172 , G02B6/34 , G02B2027/0178
Abstract: An augmented-reality (AR) eyewear display utilizes an optical waveguide having multi-layered optical gratings in a repeating arrangement. The optical gratings include varying depths, slope angles, lengths, and/or widths in order to tune the gratings to provide an improved AR eyewear display. By using the different configurations of two-dimensional or three-dimensional gratings disclosed herein in a waveguide of an AR eyewear display, optical characteristics of the waveguide are optimized to provide, e.g., high resolution and/or contrast, high display uniformity, high input coupling efficiency, and/or high output coupling efficiency. Accordingly, in some embodiments, aspects of the present disclosure enable lower-power AR eyewear displays to produce the same quality of display of a higher-power conventional AR eyewear display waveguide.
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