-
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.
-
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.
-
公开(公告)号：US20220244680A1
公开(公告)日：2022-08-04
申请号：US17649272
申请日：2022-01-28
Applicant: DigiLens Inc.
Inventor： Michiel Koen Callens , Milan Momcilo Popovich , Alastair John Grant
IPC: G03H1/04
Abstract: Methods and systems for forming holographic gratings are described herein. The methods and systems may decrease the amount of haze produced during exposure of a holographic recording medium. In some embodiments, the methods and systems include a holographic recording medium; a master hologram containing a grating; and a light source and moveable deflector configured to diffract light through the master hologram into the holographic medium to form a holographic interference pattern. The moveable deflector is configured to move in a direction parallel to the extending direction of the grating. Advantageously, moving the light in this direction allows the holographic interference pattern to remain stationary while there is a spatio-temporal displacement and cancellation of unwanted intensity nonuniformities.
-
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.
-
Patent Agency Ranking
公开(公告)号：US20220197026A1
公开(公告)日：2022-06-23
申请号：US17645212
申请日：2021-12-20
Applicant: DigiLens Inc.
Inventor： Alastair John Grant , Richard Bergstrom , Roger Allen Conley Smith , Michiel Koen Callens , Nicholas Sherwood , Nima Shams , Milan Momcilo Popovich
Abstract: Methods and apparatus for eye-glow suppression in waveguide systems is disclosed herein. Some embodiments of the methods and the apparatus include a source of image modulated light; a waveguide having an eye-facing surface and an external surface facing the outside world; an input coupler for coupling the light into a total reflection internal path in the waveguide; at least one grating for providing beam expansion and extracting light from the waveguide towards an eyebox; a polymer grating structure comprising a modulation depth and a grating pitch. The modulation depth is greater than the grating pitch across at least a portion of the polymer grating structure. Advantageously, the polymer grating structure is configured to diffract light entering the waveguide from the outside world or stray light generated within the waveguide away from optical paths that are refracted through the external surface into the outside world.
-
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.
-
公开(公告)号：US12222499B2
公开(公告)日：2025-02-11
申请号：US17645212
申请日：2021-12-20
Applicant: DigiLens Inc.
Inventor： Alastair John Grant , Richard E. Bergstrom, Jr. , Roger Allen Conley Smith , Michiel Koen Callens , Nicholas Sherwood , Nima Shams , Milan Momcilo Popovich
Abstract: Methods and apparatus for eye-glow suppression in waveguide systems is disclosed herein. Some embodiments of the methods and the apparatus include a source of image modulated light; a waveguide having an eye-facing surface and an external surface facing the outside world; an input coupler for coupling the light into a total reflection internal path in the waveguide; at least one grating for providing beam expansion and extracting light from the waveguide towards an eyebox; a polymer grating structure comprising a modulation depth and a grating pitch. The modulation depth is greater than the grating pitch across at least a portion of the polymer grating structure. Advantageously, the polymer grating structure is configured to diffract light entering the waveguide from the outside world or stray light generated within the waveguide away from optical paths that are refracted through the external surface into the outside world.
-
公开(公告)号：US20230213767A1
公开(公告)日：2023-07-06
申请号：US17999662
申请日：2021-05-26
Applicant: DigiLens Inc.
Inventor： Alastair John Grant , Milan Momcilo Popovich , Nicholas Sherwood , Roger Allen Conley Smith , Michiel Koen Callens , Nima Shams
CPC classification number: G02B27/0172 , G02B6/005 , G02B27/0043
Abstract: Methods and apparatus for eye-glow suppression in waveguide systems is disclosed herein. Some embodiments of the methods and the apparatus include a waveguide based display including a waveguide including an in-coupling optical element and an out-coupling optical element, where the in-coupling optical element is configured to in-couple image containing light and the out-coupling optical element is configured to out-couple the image counting light towards a user, where the waveguide comprises an outer surface and an inner surface opposite to the outer surface, and wherein the inner surface is closer to the user than the outer surface; and a partially light blocking layer above the outer surface of the waveguide opposite to the user, where the partially light blocking layer is configured to keep eye glow light from entering the environment outside the outer surface of the waveguide.
-
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.
-
-
-
-
-
-
-
-
Search Results
9
records
(took 0.015 seconds)
