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公开(公告)号：US20240255763A1
公开(公告)日：2024-08-01
申请号：US18622925
申请日：2024-03-30
申请人： Magic Leap, Inc.
发明人： Vikramjit SINGH , Kang LUO , Michal Beau Dennison VAUGHN , Samarth BHARGAVA , Shuqiang YANG , Michael Nevin MILLER , Frank Y. XU , Michael Anthony KLUG , Kevin MESSER , Robert D. TEKOLSTE , Xiaopei DENG , Xiao LI
CPC分类号： G02B27/0172 , G02B6/0016 , G02B6/0036 , G02B6/0076 , G02B6/34 , G02B2027/0118 , G02B2027/0125
摘要： Waveguides comprising materials with refractive index greater than or equal to 1.8 and methods of patterning waveguides are disclosed. Patterned waveguides comprising materials with refractive index greater than or equal to 1.8 can be incorporated in display devices, such as, for example wearable display devices to project virtual images to a viewer. A waveguide may be transparent and may comprise a substrate comprising a first material having a first refractive index greater than about 2.0. Diffractive features may be formed, on the substrate, of a second material having a second refractive index that is lower than the first refractive index. A third material may be disposed over the diffractive features and may have a third refractive index that is higher than the second refractive index.
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公开(公告)号：US20240361602A1
公开(公告)日：2024-10-31
申请号：US18766282
申请日：2024-07-08
申请人： Magic Leap, Inc.
发明人： Kang LUO , Vikramjit SINGH , Nai-Wen PI , Shuqiang YANG , Frank Y. XU
CPC分类号： G02B27/0172 , G02B6/34 , G02B27/0176 , G02B2027/0178
摘要： Blazed diffraction gratings provide optical elements in head-mounted display systems to, e.g., incouple light into or out-couple light out of a waveguide. These blazed diffraction gratings may be configured to have reduced polarization sensitivity. Such gratings may, for example, incouple or outcouple light of different polarizations with similar level of efficiency. The blazed diffraction gratings and waveguides may be formed in a high refractive index substrate such as lithium niobate. In some implementations, the blazed diffraction gratings may include diffractive features having a feature height of 40 nm to 120 nm, for example, 80 nm. The diffractive features may be etched into the high index substrate, e.g., lithium niobate.
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公开(公告)号：US20240134097A1
公开(公告)日：2024-04-25
申请号：US18400891
申请日：2023-12-29
申请人： Magic Leap, Inc.
发明人： Shuqiang YANG , Kang LUO , Vikramjit SINGH , Frank Y. XU
CPC分类号： G02B5/1857 , G02B5/1842 , G02B27/0172 , G02B2027/0125
摘要： A method of fabricating a blazed diffraction grating comprises providing a master template substrate and imprinting periodically repeating lines on the master template substrate in a plurality of master template regions. In some embodiments, the periodically repeating lines in different ones of the master template regions extend in different directions. The method additionally comprises using at least one of the master template regions as a master template to imprint at least one blazed diffraction grating pattern on a grating substrate. In some embodiments, the method further comprises coating the periodically repeating lines with a material having a greater hardness than the material that forms the lines.
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公开(公告)号：US20240192494A1
公开(公告)日：2024-06-13
申请号：US18407878
申请日：2024-01-09
申请人： Magic Leap, Inc.
发明人： Michael Anthony Klug , Kevin Richard CURTIS , Vikramjit SINGH , Kang LUO , Michal Beau Dennison Vaughn , Samarth Bhargava , Shuqiang YANG , Michael Nevin Miller , Frank Y. Xu , Kevin Messer , Robert D. TEKOLSTE
CPC分类号： G02B27/0172 , G02B6/0023 , G02B6/005 , G02B6/0065 , G02B6/0076 , G02B25/001 , G02B27/0149 , G02B5/201 , G02B2027/012 , G02B2027/0123 , G02B2027/0154 , G02B2027/0178 , G02B2027/0185
摘要： Very high refractive index (n>2.2) lightguide substrates enable the production of 70° field of view eyepieces with all three color primaries in a single eyepiece layer. Disclosed herein are viewing optics assembly architectures that make use of such eyepieces to reduce size and cost, simplifying manufacturing and assembly, and better-accommodating novel microdisplay designs.
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公开(公告)号：US20240184113A1
公开(公告)日：2024-06-06
申请号：US18414100
申请日：2024-01-16
申请人： Magic Leap, Inc.
发明人： Roy Matthew PATTERSON , Chulwoo OH , Ravi Kumar KOMANDURI , Charles Scott CARDEN , Michael Nevin MILLER , Vikramjit SINGH , Shuqiang YANG
CPC分类号： G02B27/0172 , G02B6/0076 , G02F1/29 , G02B2027/0112 , G02F1/294
摘要： A display device includes a waveguide assembly comprising a waveguide configured to outcouple light out of a major surface of the waveguide to form an image in the eyes of a user. An adaptive lens assembly comprises a switchable waveplate assembly. The switchable waveplate assembly includes quarter-wave plates on opposing sides of a switchable liquid crystal layer, and electrodes on the quarter-wave plates in the volume between the quarter-wave plates. The electrodes can selectively establish an electric field and may serve as an alignment structure for molecules of the liquid crystal layer. Portions of the adaptive lens assembly may be manufactured by roll-to-roll processing in which a substrate roll is unwound, and alignment layers and liquid crystal layers are formed on the substrate as it moves towards a second roller, to be wound on that second roller.
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6.发明公开公开(公告)号：US20240359372A1
公开(公告)日：2024-10-31
申请号：US18686440
申请日：2022-08-17
申请人： Magic Leap, Inc.
发明人： Shuqiang YANG , Vikramjit SINGH , David James LENTZ , Frank Y. XU , Marlon Edward MENEZES , Yanhua WANG
CPC分类号： B29C43/021 , B29C33/424 , B29C43/40 , B29C2043/025 , B29L2011/0075
摘要： Methods are disclosed for fabricating molds for forming waveguides with integrated spacers for forming eyepieces. The molds are formed by etching features (e.g., 1 μm to 1000 μm deep) into a substrate comprising single crystalline material using an anisotropic wet etch. The etch masks for defining the large features may comprise a plurality of holes, wherein the size and shape of each hole at least partially determine the depth of the corresponding large feature. The holes may be aligned along a crystal axis of the substrate and the etching may automatically stop due to the crystal structure of the substrate. The patterned substrate may be utilized as a mold onto which a flowable polymer may be introduced and allowed to harden. Hardened polymer in the holes may form a waveguide with integrated spacers. The mold may be also used to fabricate a platform comprising a plurality of vertically extending microstructures of precise heights, to test the curvature or flatness of a sample, e.g., based on the amount of contact between the microstructures and the sample.
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公开(公告)号：US20240319506A1
公开(公告)日：2024-09-26
申请号：US18679328
申请日：2024-05-30
申请人： Magic Leap, Inc.
发明人： Xiaopei DENG , Vikramjit SINGH , Shuqiang YANG , Kang LUO , Nai-Wen PI , Frank Y. Xu
CPC分类号： G02B27/0172 , G02B6/0011 , G02B6/1223 , G02B6/13 , G02B27/0081 , G02B6/10 , G02B2027/0174
摘要： Recesses are formed on a front side and a rear side of a waveguide. A solid porogen material is spun onto the front side and the rear side and fills the recesses. First front and rear cap layers are then formed on raised formations of the waveguide and on the solid porogen material. The entire structure is then heated and the solid porogen material decomposes to a porogen gas. The first front and rear cap layers are porous to allow the porogen gas to escape and air to enter into the recesses. The air maximizes a difference in refractive indices between the high-index transparent material of the waveguide and the air to promote reflection in the waveguide from interfaces between the waveguide and the air.
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8.发明公开公开(公告)号：US20230341692A1
公开(公告)日：2023-10-26
申请号：US18319745
申请日：2023-05-18
申请人： Magic Leap, Inc.
发明人： Jeffrey Dean SCHMULEN , Neal Paul RICKS , Samarth BHARGAVA , Kevin MESSER , Victor Kai LIU , Matthew Grant DIXON , Xiaopei DENG , Marlon Edward MENEZES , Shuqiang YANG , Vikramjit SINGH , Kang LUO , Frank Y. XU
CPC分类号： G02B27/0172 , G02B6/0026 , G02B6/26 , G02B27/1046 , G02B27/4233 , G06T19/006 , G02B6/10
摘要： Display devices include waveguides with in-coupling optical elements that mitigate re-bounce of in-coupled light to improve overall in-coupling efficiency and/or uniformity. A waveguide receives light from a light source and/or projection optics and includes an in-coupling optical element that in-couples the received light to propagate by total internal reflection in a propagation direction within the waveguide. Once in-coupled into the waveguide the light may undergo re-bounce, in which the light reflects off a waveguide surface and, after the reflection, strikes the in-coupling optical element. Upon striking the in-coupling optical element, the light may be partially absorbed and/or out-coupled by the optical element, thereby effectively reducing the amount of in-coupled light propagating through the waveguide. The in-coupling optical element can be truncated or have reduced diffraction efficiency along the propagation direction to reduce the occurrence of light loss due to re-bounce of in-coupled light, resulting in less in-coupled light being prematurely out-coupled and/or absorbed during subsequent interactions with the in-coupling optical element.
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公开(公告)号：US20230258943A1
公开(公告)日：2023-08-17
申请号：US18308404
申请日：2023-04-27
申请人： Magic Leap, Inc.
发明人： Kang LUO , Vikramjit SINGH , Nai-Wen PI , Shuqiang YANG , Frank Y. XU
CPC分类号： G02B27/0172 , G02B27/0176 , G02B6/34 , G02B2027/0178
摘要： Blazed diffraction gratings provide optical elements in head-mounted display systems to, e.g., incouple light into or out-couple light out of a waveguide. These blazed diffraction gratings may be configured to have reduced polarization sensitivity. Such gratings may, for example, incouple or outcouple light of different polarizations with similar level of efficiency. The blazed diffraction gratings and waveguides may be formed in a high refractive index substrate such as lithium niobate. In some implementations, the blazed diffraction gratings may include diffractive features having a feature height of 40 nm to 120 nm, for example, 80 nm. The diffractive features may be etched into the high index substrate, e.g., lithium niobate.
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公开(公告)号：US20220075118A1
公开(公告)日：2022-03-10
申请号：US17416248
申请日：2019-12-20
申请人： Magic Leap, Inc.
发明人： Xiaopei DENG , Vikramjit SINGH , Shuqiang YANG , Kang LUO , Nai-Wen PI , Frank Y. XU
摘要： Recesses are formed on a front side and a rear side of a waveguide. A solid porogen material is spun onto the front side and the rear side and fills the recesses. First front and rear cap layers are then formed on raised formations of the waveguide and on the solid porogen material. The entire structure is then heated and the solid porogen material decomposes to a porogen gas. The first front and rear cap layers are porous to allow the porogen gas to escape and air to enter into the recesses. The air maximizes a difference in refractive indices between the high-index transparent material of the waveguide and the air to promote reflection in the waveguide from interfaces between the waveguide and the air.
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