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公开(公告)号：US12158612B2
公开(公告)日：2024-12-03
申请号：US17653818
申请日：2022-03-07
Applicant: DigiLens Inc.
Inventor： Jonathan David Waldern , Alastair John Grant , Milan Momcilo Popovich , Shibu Abraham , Baeddan George Hill , Tsung-Jui Ho , Michiel Koen Callens , Hyesog Lee
Abstract: Gratings may be used in waveguides. Deep surface relief gratings (SRGs) may offer many advantages over conventional SRGs, an important one being a higher S-diffraction efficiency. Deep SRGs can be implemented as polymer surface relief gratings or evacuated periodic structures (EPSs). EPSs can be formed by first recording a holographic polymer dispersed liquid crystal (HPDLC) periodic structure. Removing the liquid crystal from the cured periodic structure provides a polymer surface relief grating. Polymer surface relief gratings have many applications including for use in waveguide-based displays.
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2.发明授权公开(公告)号：US12271035B2
公开(公告)日：2025-04-08
申请号：US18362870
申请日：2023-07-31
Applicant: DigiLens Inc.
Inventor： Jonathan David Waldern , Alastair John Grant , Hyesog Lee , Gerald Buxton , Milan Momcilo Popovich
Abstract: Multiplexed reflection and transmission gratings, and methods of their manufacture, are provided that improve uniformity with laser light, that is, reduced banding and other illumination artifacts occurring in waveguides. The mechanism for this can be the multiple reflections between the waveguide reflecting surfaces and the reflection hologram, which promote illumination averaging as beam propagation processes within a waveguide. In some gratings, a beam splitter layer overlapping the multiplexed gratings can be provided for the purposes of reducing banding in a laser-illuminated waveguide. The beam splitter can be provided by one or more dielectric layers. The beamsplitter can have sensitivity to one polarization. The beamsplitter can be sensitive to S-polarization. The beam splitter can be an anti-reflection coating optimized for normal incidence that becomes reflective at high TIR angles when immersed in glass or plastic.
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3.发明授权公开(公告)号：US11747568B2
公开(公告)日：2023-09-05
申请号：US17410828
申请日：2021-08-24
Applicant: DigiLens Inc.
Inventor： Jonathan David Waldern , Alastair John Grant , Hyesog Lee , Gerald Buxton , Milan Momcilo Popovich
CPC classification number: G02B6/3522 , G02B6/0016 , G02B6/02076 , G02B6/02276 , G02B27/0081
Abstract: Multiplexed reflection and transmission gratings, and methods of their manufacture, are provided that improve uniformity with laser light, that is, reduced banding and other illumination artifacts occurring in waveguides. The mechanism for this can be the multiple reflections between the waveguide reflecting surfaces and the reflection hologram, which promote illumination averaging as beam propagation processes within a waveguide. In some gratings, a beam splitter layer overlapping the multiplexed gratings can be provided for the purposes of reducing banding in a laser-illuminated waveguide. The beam splitter can be provided by one or more dielectric layers. The beamsplitter can have sensitivity to one polarization. The beamsplitter can be sensitive to S-polarization. The beam splitter can be an anti-reflection coating optimized for normal incidence that becomes reflective at high TIR angles when immersed in glass or plastic.
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公开(公告)号：US20220283378A1
公开(公告)日：2022-09-08
申请号：US17663322
申请日：2022-05-13
Applicant: DigiLens Inc.
Inventor： Jonathan David Waldern , Alastair John Grant , Milan Momcilo Popovich , Shibu Abraham , Baeddan George Hill , Tsung-Jui Ho , Michiel Koen Callens , Hyesog Lee
Abstract: Improvements to gratings for use in waveguides and methods of producing them are described herein. Deep surface relief gratings (SRGs) may offer many advantages over conventional SRGs, an important one being a higher S-diffraction efficiency. In one embodiment, deep SRGs can be implemented as polymer surface relief gratings or evacuated periodic structures (EPSs). EPSs can be formed by first recording a holographic polymer dispersed liquid crystal (HPDLC) periodic structure. Removing the liquid crystal from the cured periodic structure provides a polymer surface relief grating. Polymer surface relief gratings have many applications including for use in waveguide-based displays.
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公开(公告)号：US20240219738A1
公开(公告)日：2024-07-04
申请号：US18689045
申请日：2022-09-02
Applicant: DigiLens Inc.
Inventor： Nima Shams , George Hines , Stanislav Dmitryiyev , Nicholas Sherwood , Alastair John Grant , Hyesog Lee , Roger Allen Conley Smith , John Border , Joe Bietry , Milan Momcilo Popovich , Suhas Maheshaiah
CPC classification number: G02B27/0172 , G02C11/10 , G02B2027/0138 , G02B2027/014 , G02B2027/0178
Abstract: Disclosed herein is a head worn augmented reality display including a waveguide assembly including a first waveguide and a second waveguide; a first projector configured to output image containing light towards a first waveguide, where the image containing light is inputted into total internal reflection in the first waveguide and then outputted towards a user's first eye; a second projector configured to output image containing light towards a second waveguide, where the image containing light is inputted into total internal reflection in the second waveguide and then outputted towards a user's second eye. The first waveguide and the second waveguide are substantially transparent to light from the outside environment such that both the image containing light and light from the outside environment enters the user's eyes.
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Patent Agency Ranking
6.发明公开公开(公告)号：US20240027689A1
公开(公告)日：2024-01-25
申请号：US18362870
申请日：2023-07-31
Applicant: DigiLens Inc.
Inventor： Jonathan David Waldern , Alastair John Grant , Hyesog Lee , Gerald Buxton , Milan Momcilo Popovich
CPC classification number: G02B6/3522 , G02B6/0016 , G02B6/02276 , G02B27/0081 , G02B6/02076
Abstract: Multiplexed reflection and transmission gratings, and methods of their manufacture, are provided that improve uniformity with laser light, that is, reduced banding and other illumination artifacts occurring in waveguides. The mechanism for this can be the multiple reflections between the waveguide reflecting surfaces and the reflection hologram, which promote illumination averaging as beam propagation processes within a waveguide. In some gratings, a beam splitter layer overlapping the multiplexed gratings can be provided for the purposes of reducing banding in a laser-illuminated waveguide. The beam splitter can be provided by one or more dielectric layers. The beamsplitter can have sensitivity to one polarization. The beamsplitter can be sensitive to S-polarization. The beam splitter can be an anti-reflection coating optimized for normal incidence that becomes reflective at high TIR angles when immersed in glass or plastic.
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公开(公告)号：US20220283376A1
公开(公告)日：2022-09-08
申请号：US17653818
申请日：2022-03-07
Applicant: DigiLens Inc.
Inventor： Jonathan David Waldern , Alastair John Grant , Milan Momcilo Popovich , Shibu Abraham , Baeddan George Hill , Tsung-Jui Ho , Michiel Koen Callens , Hyesog Lee
Abstract: Improvements to gratings for use in waveguides and methods of producing them are described herein. Deep surface relief gratings (SRGs) may offer many advantages over conventional SRGs, an important one being a higher S-diffraction efficiency. In one embodiment, deep SRGs can be implemented as polymer surface relief gratings or evacuated periodic structures (EPSs). EPSs can be formed by first recording a holographic polymer dispersed liquid crystal (HPDLC) periodic structure. Removing the liquid crystal from the cured periodic structure provides a polymer surface relief grating. Polymer surface relief gratings have many applications including for use in waveguide-based displays.
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公开(公告)号：US20230204841A1
公开(公告)日：2023-06-29
申请号：US18147298
申请日：2022-12-28
Applicant: DigiLens Inc.
Inventor： Alastair John Grant , Gerald Buxton , Hyesog Lee
CPC classification number: G02B5/32 , G02B5/003 , G02B27/0983 , G02B27/142 , G02B27/44
Abstract: Disclosed herein is methods and apparatus for recording a holographic waveguide utilizing an inverted holographic master technique. In some embodiments, an apparatus for recording a holographic waveguide is provided. The apparatus may include a source of light configured to provide a recording beam; a master substrate with a non-grating modulated surface and a grating modulated surface, wherein the grating modulated surface is opposite to the non-grating modulated surface and is configured to diffract the recording beam; a bottom substrate with opposing light transmitting surfaces coated with anti-reflection coatings overlaying the grating modulated surface of the substrate and separated from the master substrate by a gap; and an exposure cell containing holographic recording material directly facing the non-grating modulated surface of the master substrate. Advantageously, the inverted holographic master technique mitigates the effects of unwanted reflected exposure light.
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公开(公告)号：US20230061090A1
公开(公告)日：2023-03-02
申请号：US17822625
申请日：2022-08-26
Applicant: DigiLens Inc.
Inventor： Milan Momcilo Popovich , Alastair John Grant , Roger Allen Conley Smith , Richard E. Bergstrom, JR. , Hyesog Lee , Michiel Koen Callens
IPC: G02F1/1334 , G02B5/32 , G03H1/02
Abstract: Various embodiments of this disclosure relate to a piecewise varying rolled K-vector grating structure including: a first grating section containing a grating with a first K-vector, a second grating section containing a grating with a second K-vector; and a first boundary region positioned between the first grating section and the second grating section. The first boundary region is a multiplexed grating region including both the first K-vector and the second K-vector. Further disclosed is a method for recording such a grating structure utilizing a holographic recording process. Providing a multiplexed grating in the first boundary region may largely remove line exposure artifacts between adjacent sections of the P-RKV grating.
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10.发明申请公开(公告)号：US20220099898A1
公开(公告)日：2022-03-31
申请号：US17410828
申请日：2021-08-24
Applicant: DigiLens Inc.
Inventor： Jonathan David Waldern , Alastair John Grant , Hyesog Lee , Gerald Buxton , Milan Momcilo Popovich
Abstract: Multiplexed reflection and transmission gratings, and methods of their manufacture, are provided that improve uniformity with laser light, that is, reduced banding and other illumination artifacts occurring in waveguides. The mechanism for this can be the multiple reflections between the waveguide reflecting surfaces and the reflection hologram, which promote illumination averaging as beam propagation processes within a waveguide. In some gratings, a beam splitter layer overlapping the multiplexed gratings can be provided for the purposes of reducing banding in a laser-illuminated waveguide. The beam splitter can be provided by one or more dielectric layers. The beamsplitter can have sensitivity to one polarization. The beamsplitter can be sensitive to S-polarization. The beam splitter can be an anti-reflection coating optimized for normal incidence that becomes reflective at high TIR angles when immersed in glass or plastic.
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