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

IPC: G02B6/34 ,  G02B5/18 ,  G02B5/32 ,  G03H1/02 ,  G03H1/04 ,  H10K50/80

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.

公开(公告)号：US20240255760A1

公开(公告)日：2024-08-01

申请号：US18465091

申请日：2023-09-11

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern ,  Alastair John Grant

IPC: G02B27/01 ,  G02B5/18 ,  G02B27/00 ,  G02F1/29

CPC classification number: G02B27/0172 ,  G02B5/1866 ,  G02B6/0016 ,  G02B6/0035 ,  G02B6/0076 ,  G02B27/0081 ,  G02B27/0093 ,  G02B27/0179 ,  G02F1/292 ,  G02B2027/0114 ,  G02B2027/0125 ,  G02B2027/0187

Abstract: An optical display comprises: a first waveguide comprising a first surface and a second surface, an input coupler, a fold grating, and an output grating. The input coupler receives collimated first wavelength light from an Input Image Node causes the light to travel within the first waveguide via total internal reflection between the first surface and the second surface to the fold grating. The fold grating provides pupil expansion in a first direction directs the light to the output grating via total internal reflection between the first surface and the second surface. The output grating provides pupil expansion in a second direction different than the first direction and causes the light to exit the first waveguide from the first surface or the second surface. At least one of the input coupler, fold grating and output grating is a rolled k-vector grating, and the fold grating is a dual interaction grating.

公开(公告)号：US20240217142A1

公开(公告)日：2024-07-04

申请号：US18457227

申请日：2023-08-28

Applicant: DigiLens Inc.

Inventor： Jonathan David Waldern ,  Shibu Abraham ,  Milan Momcilo Popovich

IPC: B29C35/08 ,  G02F1/13 ,  G02F1/1334 ,  G02B6/12

CPC classification number: B29C35/0805 ,  G02F1/1326 ,  G02F1/1334 ,  B29C2035/0827 ,  G02B2006/12166

Abstract: Systems and methods for compensating for nonuniform surface topography features in accordance with various embodiments of the invention are illustrated. One embodiment includes a method for manufacturing waveguide cells, the method including providing a waveguide including first and second substrates and a layer of optical recording material, and applying a surface forming process to at least one external surface of the first and second substrates. In another embodiment, applying the surface forming process includes applying a forming material coating to the at least one external surface, providing a forming element having a forming surface, bringing the forming element in physical contact with the forming material coating, curing the forming material coating while it is in contact with the forming element, and releasing the forming material coating from the forming element.

公开(公告)号：US11994674B2

公开(公告)日：2024-05-28

申请号：US17322387

申请日：2021-05-17

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern ,  Alastair John Grant

IPC: G02B27/00 ,  A61B3/113 ,  F21V8/00 ,  G02B6/34 ,  G02B27/01 ,  G02F1/29 ,  G02F1/295 ,  G02F1/313 ,  G02B5/18 ,  G02B6/42 ,  G02F1/1334 ,  G06V40/18 ,  H04N5/33

CPC classification number: G02B27/0093 ,  A61B3/113 ,  G02B6/0016 ,  G02B6/34 ,  G02B27/017 ,  G02B27/0172 ,  G02F1/292 ,  G02F1/2955 ,  G02F1/3132 ,  G02B5/18 ,  G02B6/4287 ,  G02B2027/0138 ,  G02B2027/014 ,  G02B2027/0174 ,  G02B2027/0187 ,  G02F1/13342 ,  G02F1/294 ,  G02F2201/16 ,  G02F2201/30 ,  G02F2201/302 ,  G02F2201/305 ,  G02F2201/307 ,  G02F2203/24 ,  G02F2203/28 ,  G02F2203/62 ,  G06V40/193 ,  H04N5/33

Abstract: An eye tracker comprises a light source; a detector; and first and second waveguides. The first waveguide comprises an input coupler for coupling source light into a waveguide path and a first grating for coupling light out of the waveguide path onto an eye. The second waveguide comprises a second grating for coupling light reflected from the eye into a waveguide path and an output coupler for coupling light out of the waveguide path onto the detector. The second grating is optically configured for imaging the eye onto the detector.

公开(公告)号：US20240019640A1

公开(公告)日：2024-01-18

申请号：US18317864

申请日：2023-05-15

Applicant: DigiLens Inc. ,  Rockwell Collins, Inc.

Inventor： Jonathan David Waldern ,  Alastair John Grant ,  Milan Momcilo Popovich ,  James H. Stanley ,  Robert D. Brown

IPC: G02B6/34 ,  G02B5/18 ,  G02B27/42 ,  G02B27/01 ,  G02F1/1334 ,  G02B5/32 ,  G02B6/124 ,  F21V8/00

CPC classification number: G02B6/34 ,  G02B5/1819 ,  G02B5/1823 ,  G02B27/4205 ,  G02B27/0172 ,  G02F1/13342 ,  G02B5/32 ,  G02B6/124 ,  G02B6/0016 ,  G02B27/4261 ,  G02B2027/0125

Abstract: An optical waveguide comprises at least two TIR surface and contains a grating. Input TIR light with a first angular range along a first propagation direction undergoes at least two diffractions at the grating. Each diffraction directs light into a unique TIR angular range along a second propagation direction.

公开(公告)号：US20230359146A1

公开(公告)日：2023-11-09

申请号：US18311844

申请日：2023-05-03

Applicant: DigiLens Inc.

Inventor： Jonathan David Waldern ,  Milan Momcilo Popovich ,  Alastair John Grant

IPC: G03H1/20 ,  G03H1/04 ,  G03H1/02 ,  G02B6/00 ,  G02B27/01 ,  G02B27/00

CPC classification number: G03H1/20 ,  G03H1/0408 ,  G03H1/0248 ,  G02B6/00 ,  G02B27/0172 ,  G02B27/0081 ,  G02B27/0093 ,  G03H2223/16 ,  G03H2260/00

Abstract: Mastering systems and methods of fabricating waveguides and waveguide devices using such mastering systems are described. Mastering systems for fabricating holographic waveguides can include using a master to control the application of energy (e.g. a laser, light, or magnetic beam) onto a liquid crystal substrate to fabricate a holographic waveguide into the liquid crystal substrate. Mastering systems for fabricating holographic waveguides in accordance with embodiments of the invention can include a variety of features. These features include, but are not limited to: chirp for single input beam copy (near i.e. hybrid contact copy), dual chirped gratings (for input and output), zero order grating for transmittance control, alignment reference gratings, 3:1 construction, position adjustment tooling to enable rapid alignment, optimization of lens and window thickness for multiple RKVs simultaneously, and avoidance of other orders and crossover of the diffraction beam.

公开(公告)号：US11740472B2

公开(公告)日：2023-08-29

申请号：US17647818

申请日：2022-01-12

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern ,  Alastair John Grant

IPC: G02B27/01 ,  G02B6/34 ,  F21V8/00

CPC classification number: G02B27/0172 ,  G02B6/003 ,  G02B6/0016 ,  G02B6/0035 ,  G02B6/0045 ,  G02B6/0058 ,  G02B6/0076 ,  G02B27/0101 ,  G02B6/34 ,  G02B2027/013 ,  G02B2027/0118 ,  G02B2027/0125

Abstract: A waveguide display is provided comprising: an input image generator providing image light projected over a field of view; a waveguide having first and second external surfaces; and at least one grating optically coupled to the waveguide for extracting light towards a viewer. The waveguide has a lateral refractive index variation between said external surfaces that prevents any ray propagated within the waveguide from optically interacting with at least one of the external surfaces.

公开(公告)号：US20230030594A1

公开(公告)日：2023-02-02

申请号：US17816240

申请日：2022-07-29

Applicant: DigiLens Inc.

Inventor： Jonathan David Waldern ,  Alastair John Grant ,  Milan Momcilo Popovich

IPC: G03H1/02 ,  B05D1/02 ,  B05D1/00 ,  G03F7/00 ,  B05D5/06 ,  G02B5/18 ,  F21V8/00

Abstract: Systems and methods for fabricating optical elements in accordance with various embodiments of the invention are illustrated. One embodiment includes a method for fabricating an optical element, the method including providing a first optical substrate, depositing a first layer of a first optical recording material onto the first optical substrate, applying an optical exposure process to the first layer to form a first optical structure, temporarily erasing the first optical structure, depositing a second layer of a second optical recording material, and applying an optical exposure process to the second layer to form a second optical structure, wherein the optical exposure process includes using at least one light beam traversing the first layer.

公开(公告)号：US20230027493A1

公开(公告)日：2023-01-26

申请号：US17758388

申请日：2020-12-31

Applicant: DigiLens Inc.

Inventor： Nima Shams ,  Nicholas Sherwood ,  George Hines

IPC: G02B27/01 ,  F21V8/00

Abstract: The present disclosure relates to modular waveguide displays including: a modular frame; a waveguide lens attached to the modular frame, where the waveguide lens in configured to be attached to the modular frame to locate one or more waveguides within the waveguide lens in front of the modular frame; and an optical engine which is configured to be attached to the modular frame, wherein, when the optical engine is attached to the modular frame, the optical engine is configured to provide image containing information to a front side of the one or more waveguides. Advantageously, a modular waveguide display allows for customization by a user. The modular waveguide display is designed to operate without such components as the optical engine when such functionality is undesired to save weight and power. Also, modular waveguide displays allow for parallel development of components such as the waveguide lens and the optical engine.

公开(公告)号：US11561409B2

公开(公告)日：2023-01-24

申请号：US16932482

申请日：2020-07-17

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern ,  John James Storey

IPC: G02B27/48 ,  G03H1/32 ,  G02F1/1334 ,  G02F1/13357 ,  G03B21/20 ,  G02B5/18 ,  F21V8/00 ,  G02B27/42 ,  G02F1/01 ,  G02F1/1335 ,  G02F1/137 ,  G03H1/02

Abstract: An Electrically Switchable Bragg Grating (ESBG) despeckler device comprising at least one ESBG element recorded in a hPDLC sandwiched between transparent substrates to which transparent conductive coatings have been applied. At least one of said coatings is patterned to provide a two-dimensional array of independently switchable ESBG pixels. Each ESBG pixel has a first unique speckle state under said first applied voltage and a second unique speckle state under said second applied voltage.