公开(公告)号：US20190187538A1

公开(公告)日：2019-06-20

申请号：US16281969

申请日：2019-02-21

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

IPC: G02F1/29 ,  G06F3/042 ,  G06K9/00 ,  H01L27/146 ,  G02F1/1334 ,  G02B27/42 ,  G02B6/12 ,  G02B26/08

CPC classification number: G02F1/292 ,  G02B6/0076 ,  G02B6/12002 ,  G02B26/0808 ,  G02B27/4277 ,  G02B2006/12107 ,  G02B2006/12138 ,  G02F1/13342 ,  G02F2201/307 ,  G02F2203/62 ,  G06F3/0421 ,  G06K9/0004 ,  H01L27/14618 ,  H01L27/14625 ,  H01L27/14678 ,  H01L2924/0002 ,  H01L2924/00

Abstract: A contact image sensor comprises: a light source providing a collimated beam; a detector and a switchable grating array comprising first and second transparent substrates sandwiching an array of switchable grating elements with transparent electrodes applied to said substrates, said substrates together providing a total internal reflection light guide. A first transmission grating layer overlays said first substrate. A second transmission grating layer overlays said second substrate. A quarter wavelength retarder layer overlays said second transmission grating layer. A platen overlays said quarter wavelength retarder layer; a polarization-rotating reflecting layer overlaying said first transmission grating layer. An input coupler for directing light from said light source into said light guide and an output coupler for extracting light out of said light guide towards said detector are also provided.

公开(公告)号：US20190171031A1

公开(公告)日：2019-06-06

申请号：US16250764

申请日：2019-01-17

Applicant: DigiLens, Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

IPC: G02B27/48 ,  G03B21/20 ,  G02B5/02 ,  G02B5/32 ,  G02F1/29 ,  G02F1/1334 ,  G02B27/28 ,  F21V8/00 ,  G03B21/00 ,  G02F1/1333

Abstract: A device for reducing laser speckle using a micro scanner and a holographic diffuser. The micro scanner includes a first transparent optical substrate with an input surface and an output surface and a second transparent optical substrate with an input surface and an output surface and a variable refractive index medium sandwiched between the output surface of the first substrate and the input surface of the second substrate. Transparent electrodes are applied to the output surface of the first substrate and the input surface of the second substrate. The electrodes are coupled to a voltage generator. The input surface of the first substrate is optically coupled to a laser source. The input surface of the second substrate is configured as an array of prismatic elements. At least one of the input surface of the first substrate or the output surfaces of the second substrate is planar.

公开(公告)号：US20190042827A1

公开(公告)日：2019-02-07

申请号：US16148583

申请日：2018-10-01

Applicant: DigiLens, Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

IPC: G06K9/00

Abstract: A contact image sensor having an illumination source; a first SBG array device; a transmission grating; a second SBG array device; a waveguiding layer including a multiplicity of waveguide cores separated by cladding material; an upper clad layer; and a platen. The sensor further includes: an input element for coupling light from the illumination source into the first SBG array; a coupling element for coupling light out of the cores into output optical paths coupled to a detector having at least one photosensitive element.

公开(公告)号：US10156681B2

公开(公告)日：2018-12-18

申请号：US15807149

申请日：2017-11-08

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

Abstract: An optical waveguide display comprises: a waveguide; a source of light modulated with temporally-varying angularly-distributed information; a fold grating providing a first beam expansion; an input coupler for directing light into total internal reflection paths in a first propagation direction; and an output grating for providing a second beam expansion and extracting light from the waveguide. The input light undergoes at least two diffractions within the fold grating, each diffraction directing light into a unique total internal reflection angular range along a second propagation direction.

公开(公告)号：US10089516B2

公开(公告)日：2018-10-02

申请号：US15670734

申请日：2017-08-07

Applicant: DigiLens, Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

IPC: G06K9/00 ,  G02B6/34 ,  F21V8/00 ,  G02B26/08 ,  H01L27/146 ,  G02B5/18 ,  G02B27/42

Abstract: A contact image sensor having an illumination source; a first SBG array device; a transmission grating; a second SBG array device; a waveguiding layer including a multiplicity of waveguide cores separated by cladding material; an upper clad layer; and a platen. The sensor further includes: an input element for coupling light from the illumination source into the first SBG array; a coupling element for coupling light out of the cores into output optical paths coupled to a detector having at least one photosensitive element.

公开(公告)号：US20240329289A1

公开(公告)日：2024-10-03

申请号：US18620834

申请日：2024-03-28

Applicant: DigiLens Inc.

Inventor： Alastair John Grant ,  Milan Momcilo Popovich

IPC: G02B5/32 ,  G03H1/04

CPC classification number: G02B5/32 ,  G03H1/0402 ,  G02B2207/101 ,  G03H2001/0439 ,  G03H2223/25 ,  G03H2240/11 ,  G03H2250/32

Abstract: A method for recording a diffractive nanostructure is provided. The method includes: providing a holographic recording mixture including a monomer, an inert material, and a photoinitiator; depositing a layer of the mixture onto a substrate; exposing the mixture to a holographic recording beam to form a nanostructure of polymer regions and inert material regions within the mixture layer; and depositing a surface-conditioning optical layer on top of the nanostructure after curing of the expose mixture.

公开(公告)号：US20240295703A1

公开(公告)日：2024-09-05

申请号：US18483435

申请日：2023-10-09

Applicant: DigiLens Inc.

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

IPC: G02B6/34 ,  G02B27/01

CPC classification number: G02B6/34 ,  G02B6/0016 ,  G02B27/0103 ,  G02B2027/0125

Abstract: Systems and methods for providing holographic waveguide display using integrated gratings in accordance with various embodiments of the invention are illustrated. One embodiment includes a waveguide display including a source of light, and a first waveguide including a grating structure including first and second gratings, and an input coupler configured to couple a first field-of-view portion of light, and couple a second field-of-view portion of light, wherein the first grating is configured to provide beam expansion in a first direction for the first field-of-view portion of light, and provide beam expansion in the first direction and beam extraction towards a viewer for the second field-of-view portion of light, the second grating is configured to provide beam expansion in a second direction for the second field-of-view portion of light, and provide beam expansion in the second direction and beam extraction towards a viewer for the first field-of-view portion of light.

公开(公告)号：US20240134244A1

公开(公告)日：2024-04-25

申请号：US18377683

申请日：2023-10-06

Applicant: Rockwell Collins, Inc. ,  Digilens Inc.

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

IPC: G02F1/29 ,  G02B5/18 ,  G02B27/01 ,  G02B27/42

CPC classification number: G02F1/29 ,  G02B5/1814 ,  G02B27/0172 ,  G02B27/4272 ,  G02B6/0013 ,  G02B2027/0118

Abstract: One embodiment provides an apparatus for displaying an image comprising: a first optical substrate comprising at least one waveguide layer configured to propagate light in a first direction, wherein the at least one waveguide layer of the first optical substrate comprises at least one grating lamina configured to extract the light from the first substrate along the first direction; and a second optical substrate comprising at least one waveguide layer configured to propagate the light in a second direction, wherein the at least one waveguide layer of the second optical substrate comprises at least one grating lamina configured to extract light from the second substrate along the second direction; wherein the at least one grating lamina of at least one of the first and second optical substrates comprises an SBG in a passive mode.

公开(公告)号：US11815781B2

公开(公告)日：2023-11-14

申请号：US17736005

申请日：2022-05-03

Applicant: Rockwell Collins, Inc. ,  DIGILENS INC.

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

IPC: G02F1/29 ,  G02B5/18 ,  G02B27/42 ,  G02B27/01 ,  F21V8/00

CPC classification number: G02F1/29 ,  G02B5/1814 ,  G02B27/0172 ,  G02B27/4272 ,  G02B6/0013 ,  G02B2027/0118 ,  G03H2260/34

Abstract: One embodiment provides an apparatus for displaying an image comprising: a first optical substrate comprising at least one waveguide layer configured to propagate light in a first direction, wherein the at least one waveguide layer of the first optical substrate comprises at least one grating lamina configured to extract the light from the first substrate along the first direction; and a second optical substrate comprising at least one waveguide layer configured to propagate the light in a second direction, wherein the at least one waveguide layer of the second optical substrate comprises at least one grating lumina configured to extract light from the second substrate along the second direction, wherein the at least one grating lamina of at least one of the first and second optical substrates comprises an SBG in a passive mode.

公开(公告)号：US11726261B2

公开(公告)日：2023-08-15

申请号：US17451223

申请日：2021-10-18

Applicant: DigiLens Inc.

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

IPC: G02B6/126 ,  G02B6/34 ,  G02B6/27 ,  G02B6/13 ,  G02B6/12 ,  G02B6/122

CPC classification number: G02B6/126 ,  G02B6/274 ,  G02B6/34 ,  G02B6/1221 ,  G02B6/13 ,  G02B2006/12116

Abstract: Many embodiments in accordance with the invention are directed towards waveguides implementing birefringence control. In some embodiments, the waveguide includes a birefringent grating layer and a birefringence control layer. In further embodiments, the birefringence control layer is compact and efficient. Such structures can be utilized for various applications, including but not limited to: compensating for polarization related losses in holographic waveguides; providing three-dimensional LC director alignment in waveguides based on Bragg gratings; and spatially varying angular/spectral bandwidth for homogenizing the output from a waveguide. In some embodiments, a polarization-maintaining, wide-angle, and high-reflection waveguide cladding with polarization compensation is implemented for grating birefringence. In several embodiments, a thin polarization control layer is implemented for providing either quarter wave or half wave retardation.