公开(公告)号：US20230078253A1

公开(公告)日：2023-03-16

申请号：US17931495

申请日：2022-09-12

Applicant: DigiLens Inc.

Inventor： Jonathan David Waldern ,  Alastair John Grant ,  Milan Momcilo Popovich ,  Shibu Abraham ,  Baeddan George Hill ,  Tsung-Jui Ho

IPC: G02B6/02 ,  G02B6/293 ,  G02B6/12 ,  G02B5/18 ,  G02F1/13

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 and Bragg gratings, an important one being a higher S-diffraction efficiency. In one embodiment, deep SRGs can be implemented as polymer surface relief gratings or evacuated Bragg gratings (EBGs). EBGs can be formed by first recording a holographic polymer dispersed liquid crystal (HPDLC) grating. Removing the liquid crystal from the cured grating 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：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：US11586046B2

公开(公告)日：2023-02-21

申请号：US17457891

申请日：2021-12-06

Applicant: DigiLens Inc.

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

IPC: G06F3/043 ,  G06F3/042 ,  G02B27/01 ,  G02B27/00

Abstract: An optical display, including a first waveguide having a first set of surfaces, an input grating, a fold grating, and an output grating; an image input image node assembly; and a prismatic relay optics is provided. The prismatic relay optics may be configured to be optomechanically connected to the waveguide and the input image node assembly. The optical display is may also be configured to operate alone or as integrated with a headpiece to be used as a HUD. The HUD may have a first and a second configuration wherein the waveguide is decoupled or coupled.

公开(公告)号：US11579455B2

公开(公告)日：2023-02-14

申请号：US17718147

申请日：2022-04-11

Applicant: Rockwell Collins, Inc. ,  DIGILENS INC.

Inventor： James H. Stanley ,  Jonathan David Waldern ,  Milan Momcilo Popovich ,  Alastair John Grant ,  Steven J. Robbins

IPC: G02B27/01 ,  G02B5/18 ,  G02B27/10

Abstract: A near eye optical display includes a waveguide comprising a first surface and a second surface, an input coupler, a fold grating, and an output grating. The input coupler is configured to receive collimated light from a display source and to cause the light to travel within the waveguide via total internal reflection between the first surface and the second surface to the fold grating; the fold grating is configured to provide pupil expansion in a first direction and to direct the light to the output grating via total internal reflection between the first surface and the second surface; and the output grating is configured to provide pupil expansion in a second direction different than the first direction and to cause the light to exit the waveguide from the first surface or the second surface.

公开(公告)号：US20220317356A1

公开(公告)日：2022-10-06

申请号：US17808206

申请日：2022-06-22

Applicant: Rockwell Collins, Inc. ,  DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern ,  Alastair John Grant ,  Wyatt L. Hendrick ,  James H. Stanley

IPC: G02B5/30 ,  G02B27/00 ,  F21V8/00 ,  G02B30/34 ,  G02B5/32 ,  G02B27/01

Abstract: An apparatus for displaying an image, including: an input image node configured to provide at least a first and a second image modulated lights; and a holographic waveguide device configured to propagate the at least one of the first and second image modulated lights in at least a first direction. The holographic waveguide device includes: at least a first and second interspersed multiplicities of grating elements disposed in at least one layer, the first and second grating elements having respectively a first and a second prescriptions. The first and second multiplicity of grating elements are configured to deflect respectively the first and second image modulated lights out of the at least one layer into respectively a first and a second multiplicities of output rays forming respectively a first and second FOV tiles.

公开(公告)号：US11442151B2

公开(公告)日：2022-09-13

申请号：US16935037

申请日：2020-07-21

Applicant: DigiLens Inc.

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

IPC: G02B6/12 ,  G02B6/34 ,  G02B27/00 ,  G01S7/481 ,  G01S17/42 ,  G02B26/08 ,  G02B26/10 ,  G06F3/01 ,  G01S17/88 ,  G01S17/89

Abstract: A holographic waveguide LIDAR comprises a transmitter waveguide coupled to a beam deflector and a receiver waveguide coupled to a detector module. The transmitter waveguide contains an array of grating elements for diffracting a scanned laser beam into a predefined angular ranges. The receiver waveguide contains an array of grating elements for diffracting light reflected from external points within a predefined angular range towards the detector module.

公开(公告)号：US20220283377A1

公开(公告)日：2022-09-08

申请号：US17659410

申请日：2022-04-15

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Alastair John Grant ,  Nima Shams ,  Jonathan David Waldern ,  Sihui He ,  Edward Lao ,  Roger Allen Conley Smith

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

Abstract: Disclosed herein are systems and methods for providing waveguide display devices utilizing overlapping integrated dual action (IDA) waveguides. One embodiment includes a waveguide display device including: a first input image source providing first image light; a second input image source provide second image light; a first IDA waveguide; and a second IDA waveguide. The first IDA waveguide and the second IDA waveguide may include an overlapping region where a first two-dimensionally expanded first image light, a second two-dimensionally expanded first image light, a first two-dimensionally expanded second image light, and a second two-dimensionally expanded second image light is ejected towards an eyebox. Advantageously, resolution may be enhanced and field of view may be expanded through the use of overlapping IDA waveguides.

公开(公告)号：US20220260838A1

公开(公告)日：2022-08-18

申请号：US17655756

申请日：2022-03-21

Applicant: DigiLens Inc.

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

IPC: G02B27/01 ,  G02B27/00 ,  G02B5/18 ,  F21V8/00 ,  G02F1/29

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：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：US20220236571A1

公开(公告)日：2022-07-28

申请号：US17646843

申请日：2022-01-03

Applicant: DigiLens Inc.

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

IPC: G02B27/01 ,  G02B27/00 ,  A61B3/113 ,  G06V40/19 ,  G02B6/34 ,  G02B6/42 ,  G02F1/29 ,  G02F1/313 ,  G06K9/62

Abstract: An eye tracker having a first waveguide for propagating illumination light along a first waveguide path and propagating image light reflected from at least one surface of an eye along a second waveguide path. At least one grating lamina for deflecting the illumination light out of the first waveguide path towards the eye and deflecting the image light into the second waveguide path towards a detector is disposed adjacent an optical surface of the waveguide.