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公开(公告)号：US20230266512A1
公开(公告)日：2023-08-24
申请号：US18005564
申请日：2021-07-14
Applicant: DigiLens Inc.
Inventor： Gerald Buxton , Shibu Abraham , Richard E. Bergstrom, Jr. , Alastair John Grant , Tsung-Jui Ho , Baeddan George Hill , Michiel Koen Callens , Hua Gu
IPC: G02B5/18 , G02B6/34 , G02F1/13 , G02F1/1334 , G11B7/0065
CPC classification number: G02B5/1857 , G02B6/34 , G02F1/1326 , G02F1/13342 , G11B7/0065 , G02B2207/101
Abstract: Disclosed herein is a holographic mixture including nanoparticles used to form gratings through holographic exposure. In various embodiments, exposure of the holographic mixture causes the nanoparticles to diffuse to dark fringe regions which creates nanoparticle rich regions and nanoparticle poor regions. Some embodiments include a multi-layer grating which includes a layer formed through the exposed holographic mixture and another layer directly applied above the exposed holographic mixture. The other layer may also be exposed through a holographic recording beam.
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2.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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Patent Agency Ranking
3.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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4.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：US20240201584A1
公开(公告)日：2024-06-20
申请号：US18553512
申请日：2022-03-30
Applicant: DigiLens Inc.
Inventor： Shibu Abraham , Milan Momcilo Popovich , Alastair John Grant , Ratson Morad , Hua Gu , Gerald Buxton
Abstract: Waveguide based displays benefit from gratings which are capable of diffracting both S and P polarized light with high efficiency. While typical surface relief gratings (SRGs) diffract P polarized light efficiently, SRGs do not typically diffract S polarized light efficiently. One class of gratings that diffracts S polarized light with high efficiency is deep SRGs. One approach to producing deep SRGs is holographic polymer dispersed liquid crystal (HPDLC) gratings. In producing HPDLC gratings, a reactive monomer mixture is exposed to light in a polymerization process. Reactive monomer mixtures may include co-initiators and photo-initiator dyes. Co-initiators which include liquid amine synergist have been demonstrated to have advantageous results. Further, photo-initiator dyes with high extinction coefficients have demonstrated advantageous results.
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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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7.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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