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公开(公告)号:US11531202B2
公开(公告)日:2022-12-20
申请号:US17089783
申请日:2020-11-05
Applicant: Microsoft Technology Licensing, LLC
Inventor: David Bohn , Tuomas Vallius , Jani Kari Tapio Tervo
IPC: G02B27/01
Abstract: An optical combiner, configured for use in a mixed-reality display system that combines holographic and real-world images, includes an assembly of see-through waveguides that are arranged in a stack to provide full color holographic images from constituent RGB (red, green, and blue) color components received from a holographic image source. Each waveguide—one per RGB color component—includes an in-coupling DOE (diffractive optical element), an intermediate DOE, and an out-coupling DOE that are disposed on internal surfaces of the stacked waveguides in the optical combiner. Each of the out-coupling DOEs incorporates a diffractive lens functionality to render the out-coupled holographic images at a set depth on the mixed-reality display. In an illustrative non-limiting example, the out-coupling DOE may provide a half diopter of negative lens power to set the optical focus of the holographic images at 1.33 m.
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公开(公告)号:US10108014B2
公开(公告)日:2018-10-23
申请号:US15402904
申请日:2017-01-10
Applicant: Microsoft Technology Licensing, LLC
Inventor: Tuomas Vallius , Mikko Antton Juhola
Abstract: A near-eye optical display system utilized in augmented reality devices includes a see-through waveguide display having optical elements configured for in-coupling virtual images from an imager, exit pupil expansion, and out-coupling virtual images with expanded pupil to the user's eye. The near-eye optical display system further includes a curved two-sided array of electrically-activated tunable liquid crystal (LC) microlenses that is located between the waveguide and the user's eye. The LC microlenses are distributed in layers on each side of the two-sided array. Each pixel in the waveguide display is mapped to an LC microlens in the array, and multiple nearby pixels may be mapped to the same LC microlens. A region of the waveguide display that the user is gazing upon is detected and the LC microlens that is mapped to that region may be electrically activated to thereby individually shape the wavefront of each pixel in a virtual image.
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公开(公告)号:US20170357089A1
公开(公告)日:2017-12-14
申请号:US15177749
申请日:2016-06-09
Applicant: Microsoft Technology Licensing, LLC
Inventor: Jani Tervo , Tuomas Vallius
CPC classification number: G02B27/0172 , G02B6/0026 , G02B6/005 , G02B6/0076 , G02B6/0078 , G02B27/017 , G02B2027/0112 , G02B2027/0125 , G02B2027/013
Abstract: An apparatus having optical waveguides for providing a large FOV is disclosed. A first light engine projects light into an input diffractive coupler of a first waveguide at a first central angle. An output coupler of the first waveguide projects the light out of the first optical waveguide. A second light engine projects light into an input diffractive coupler of a second waveguide at a second central angle that is greater than the first central angle. An output coupler of the second waveguide projects the light out of the second optical waveguide to intersect with the light projected out of the first optical waveguide. The first waveguide may be used to project a first part of an image into a central portion of a user's vision. The second waveguide may be used to project a second part of the image into a peripheral portion of the user's vision.
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公开(公告)号:US11112605B2
公开(公告)日:2021-09-07
申请号:US16854948
申请日:2020-04-22
Applicant: Microsoft Technology Licensing, LLC
Inventor: Tuomas Vallius , Lauri Sainiemi
Abstract: In an optical display system that includes a waveguide with multiple diffractive optical elements (DOEs), gratings in one or more of the DOEs may have an asymmetric profile in which gratings may be slanted or blazed. Asymmetric gratings in a DOE can provide increased display uniformity in the optical display system by reducing the “banding” resulting from optical interference that is manifested as dark stripes in the display. Banding may be more pronounced when polymeric materials are used in volume production of the DOEs to minimize system weight, but which have less optimal optical properties compared with other materials such as glass. The asymmetric gratings can further enable the optical system to be more tolerant to variations—such as variations in thickness, surface roughness, and grating geometry—that may not be readily controlled during manufacturing particularly since such variations are in the submicron range.
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公开(公告)号:US20200292814A1
公开(公告)日:2020-09-17
申请号:US16854948
申请日:2020-04-22
Applicant: Microsoft Technology Licensing, LLC
Inventor: Tuomas Vallius , Lauri Sainiemi
Abstract: In an optical display system that includes a waveguide with multiple diffractive optical elements (DOEs), gratings in one or more of the DOEs may have an asymmetric profile in which gratings may be slanted or blazed. Asymmetric gratings in a DOE can provide increased display uniformity in the optical display system by reducing the “banding” resulting from optical interference that is manifested as dark stripes in the display. Banding may be more pronounced when polymeric materials are used in volume production of the DOEs to minimize system weight, but which have less optimal optical properties compared with other materials such as glass. The asymmetric gratings can further enable the optical system to be more tolerant to variations—such as variations in thickness, surface roughness, and grating geometry—that may not be readily controlled during manufacturing particularly since such variations are in the submicron range.
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公开(公告)号:US10241332B2
公开(公告)日:2019-03-26
申请号:US14878727
申请日:2015-10-08
Applicant: Microsoft Technology Licensing, LLC
Inventor: Tuomas Vallius
IPC: G02B27/01 , G02B6/124 , G02B6/34 , G02B27/00 , G02B5/18 , F21V8/00 , G02B27/42 , G02B6/122 , G02B27/10 , G02B6/00
Abstract: A near eye optical display system comprising a waveguide and diffractive optical elements (DOEs) for in-coupling, exit pupil expansion, and out-coupling reduces the transmission of stray light in the system using a doubly-periodic surface relief microstructure that combines a guided-mode resonant filter with Bragg reflectance. Such resonant grating filter may be configured with grooves and/or ridges of different widths that are located on the waveguide that have respective sub-periods that match Bragg reflectance periods for particular wavelengths. The interaction of the sub-periods gives rise to a photonic band gap effect in which the resonant grating's effective refractive index is modulated to increase angular sensitivity and wavelength bandwidth of the resonant grating filter. The sub-periods define an overall period (i.e., a super period) for the resonant grating filter by which incident light is coupled into the waveguide, guided, and then coupled out of the waveguide at the side of incidence.
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公开(公告)号:US20180203230A1
公开(公告)日:2018-07-19
申请号:US15407957
申请日:2017-01-17
Applicant: MICROSOFT TECHNOLOGY LICENSING, LLC
Inventor: Tuomas Vallius , Jani Tervo
CPC classification number: G02B27/0172 , G02B27/0081 , G02B2027/0125
Abstract: An optical waveguide including an input-coupler, a first intermediate-component, a second intermediate-component and an output-coupler is described herein. The input-coupler couples, into the waveguide, light corresponding to an image associated with an input-pupil and directs the light toward the first intermediate-component. The first intermediate-component performs horizontal or vertical pupil expansion and redirects the light corresponding to the image toward the output-coupler. The second intermediate-component is a diffractive component located between the first-intermediate component and the output-coupler and performs pupil redistribution on a portion of the light corresponding to the image before the portion reaches the output-coupler. The output-coupler performs the other one of horizontal or vertical pupil expansion and couples, out of the waveguide, the light corresponding to the image. Related methods and systems are also described.
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公开(公告)号:US20170299864A1
公开(公告)日:2017-10-19
申请号:US15097661
申请日:2016-04-13
Applicant: MICROSOFT TECHNOLOGY LICENSING, LLC
Inventor: Tuomas Vallius , Jani Tervo
IPC: G02B27/01 , G02B5/18 , G02B27/22 , G02B27/44 , G02F1/29 , G02B27/00 , F21V8/00 , H04N13/04 , G02F1/295 , G02B27/42
CPC classification number: G02B27/0172 , G02B5/18 , G02B5/1814 , G02B5/1819 , G02B6/0026 , G02B6/005 , G02B27/0081 , G02B27/2235 , G02B27/4205 , G02B27/44 , G02B2005/1804 , G02B2027/0123 , G02B2027/0125 , G02B2027/013 , G02B2027/0174 , G02F1/292 , G02F1/295 , H04N13/332 , H04N13/344
Abstract: An input-coupler of an optical waveguide couples light corresponding to the image and having a corresponding FOV into the optical waveguide, and the input-coupler splits the FOV of the image coupled into the optical waveguide into first and second portions by diffracting a portion of the light corresponding to the image in a first direction toward a first intermediate-component, and diffracting a portion of the light corresponding to the image in a second direction toward a second intermediate-component. An output-coupler of the waveguide combines the light corresponding to the first and second portions of the FOV, and couples the light corresponding to the combined first and second portions of the FOV out of the optical waveguide so that the light corresponding to the image and the combined first and second portions of the FOV is output from the optical waveguide. The intermediate-components and the output-coupler also provide for pupil expansion.
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公开(公告)号:US09791696B2
公开(公告)日:2017-10-17
申请号:US14936973
申请日:2015-11-10
Applicant: MICROSOFT TECHNOLOGY LICENSING, LLC
Inventor: Scott Woltman , Steven John Robbins , R. Andrew Wall , Tuomas Vallius , Tapani Levola , Pasi Kostamo
CPC classification number: G02B27/0101 , G02B5/1866 , G02B6/0016 , G02B6/0038 , G02B6/0056 , G02B27/0081 , G02B27/0103 , G02B27/4205 , G02B2027/0118 , G02B2027/0123 , G02B2027/0125
Abstract: An apparatus for use in replicating an image associated with an input-pupil to an output-pupil includes a planar optical waveguide including a bulk-substrate, and also including an input-coupler, an intermediate-component and an output-coupler. The input-coupler couples light corresponding to the image into the bulk-substrate and towards the intermediate-component. The intermediate-component performs horizontal or vertical pupil expansion and directs the light corresponding to the image towards the output-coupler. The output-coupler performs the other one of horizontal or vertical pupil expansion and couples light corresponding to the image, which travels from the input-coupler to the output-coupler, out of the waveguide. In certain embodiments, one or more of the input-coupler, the intermediate-component or the output-coupler comprises a liquid crystal polymer (LCP) based surface relief grating (SRG) or a double-side diffractive optical element (DOE), each of which can be used to improve an intensity distribution of light output by the output-coupler.
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公开(公告)号:US09671615B1
公开(公告)日:2017-06-06
申请号:US14955273
申请日:2015-12-01
Applicant: Microsoft Technology Licensing, LLC
Inventor: Tuomas Vallius , Pasi Petteri Pietilae
CPC classification number: G02B27/4205 , G02B27/0081 , G02B27/0172 , G02B27/4233 , G02B2027/0112 , G02B2027/0123 , G02B2027/014 , G02B2027/0178 , G06T19/006
Abstract: In a near-eye optical display system comprising a waveguide and diffractive optical elements (DOEs) configured for in-coupling, exit pupil expansion, and out-coupling, a wide-spectrum imager generates imaging light that is in-coupled to the system with an input pupil having an extended field of view (FOV). Wide-spectrum imaging light impinges on the in-coupling DOE over a range of incidence angles. As chromatic dispersion in the in-coupling DOE causes different wavelengths to propagate with different angles, for a given input pupil incidence angle, at least a portion of the imaging light spectrum meets a critical angle condition that enables propagation with total internal reflection (TIR) in the waveguide without leakage to the outside. Thus, different parts of the imaging light spectrum can be used for different regions of the FOV.
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