公开(公告)号：US11487131B2

公开(公告)日：2022-11-01

申请号：US17107398

申请日：2020-11-30

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

IPC: G02B27/48 ,  G02B5/02 ,  G02F1/29 ,  G02B5/32 ,  G02F1/1334 ,  G02F1/1333 ,  F21V8/00 ,  G02B27/28 ,  G03B21/00 ,  G03B21/20 ,  G02F1/13357

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：US11448937B2

公开(公告)日：2022-09-20

申请号：US17153588

申请日：2021-01-20

Applicant: DigiLens Inc. ,  Rockwell Collins, 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

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：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

IPC: G02B6/34 ,  G02B5/18 ,  G02B5/32 ,  G03H1/02 ,  G03H1/04 ,  H01L51/52

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：US11287666B2

公开(公告)日：2022-03-29

申请号：US16855812

申请日：2020-04-22

Applicant: DigiLens Inc. ,  Rockwell Collins, Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

IPC: G02B27/42 ,  F21V8/00 ,  G02B27/01 ,  G02F1/29 ,  G02F1/1334 ,  G02B5/18

Abstract: A transparent wearable data display having a source of collimated light, a deflector for deflecting the collimated light into a scanned beam, and a first of switchable grating elements sandwiched between first and second parallel transparent substrates, which together functioning as a first light guide. A first coupling is provided for directing the scanned beam into a first total internal reflection (TIR) light path of the first light guide along the first array column. The grating elements having diffracting and non-diffracting states, in their diffracting state deflecting light out of said light guide. The grating elements are switchable into their diffracting states one group of elements at a time.

公开(公告)号：US20220075242A1

公开(公告)日：2022-03-10

申请号：US17377055

申请日：2021-07-15

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

IPC: G03B21/00 ,  H04N9/31 ,  G02F1/1334 ,  G02B5/18 ,  G02B5/32 ,  G02F1/13357 ,  G06F3/042 ,  G02B27/42 ,  G02F1/29 ,  G02F1/315 ,  G01J3/18 ,  G02B6/02 ,  G02F1/225 ,  G03F7/20 ,  H01L33/10

Abstract: There is provided a projection display device comprising: a light source, an SBG device comprising a multiplicity of separately SBG elements sandwich between transparent substrate to which transparent electrodes have been applied. The substrates function as a light guide. A least one transparent electrode comprises plurality of independently switchable transparent electrodes elements, each electrode element substantially overlaying a unique SBG element. Each SBG element encodes image information to be projected on an image surface. Light coupled into the light guide, undergoes total internal reflection until diffracted out to the light guide by an activated SBG element. The SBG diffracts light out of the light guide to form an image region on an image surface when subjected to an applied voltage via said transparent electrodes.

公开(公告)号：US20220066206A1

公开(公告)日：2022-03-03

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 ,  G02F1/295 ,  G02B6/34 ,  F21V8/00 ,  G02B27/01 ,  A61B3/113 ,  G02B6/42 ,  G02F1/29 ,  G02F1/313

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：US11256155B2

公开(公告)日：2022-02-22

申请号：US16664659

申请日：2019-10-25

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

IPC: G02F1/295 ,  G02B6/26 ,  G02B6/42 ,  G02B6/34 ,  G02F1/29 ,  H01L27/146 ,  G02F1/1334 ,  G06F3/042 ,  G06K9/00 ,  G02B26/08 ,  G02B27/42 ,  G02B6/12 ,  F21V8/00

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：US11204540B2

公开(公告)日：2021-12-21

申请号：US16561923

申请日：2019-09-05

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

IPC: G03B21/00 ,  H04N9/31 ,  G02B5/18 ,  G02B5/32 ,  G02B27/42 ,  G02F1/1334 ,  G02F1/13357 ,  G06F3/042 ,  G02F1/29 ,  G02F1/315 ,  G01J3/18 ,  G02B6/02 ,  G02F1/225 ,  G03F7/20 ,  H01L33/10 ,  G02F1/1347

Abstract: A projection display device comprising a light source and an SBG device having a multiplicity of separate SBG elements sandwiched between transparent substrates to which transparent electrodes have been applied. The substrates function as a light guide. A least one transparent electrode comprises a plurality of independently switchable transparent electrode elements, each electrode element substantially overlaying a unique SBG element. Each SBG element encodes image information to be projected on an image surface. Light coupled into the light guide undergoes total internal reflection until diffracted out to the light guide by an activated SBG element. The SBG diffracts light out of the light guide to form an image region on an image surface when subjected to an applied voltage via said transparent electrodes.

公开(公告)号：US20210364836A1

公开(公告)日：2021-11-25

申请号：US17341127

申请日：2021-06-07

Applicant: DigiLens Inc.

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

IPC: G02F1/1334 ,  G02F1/1347 ,  G03H1/02

Abstract: Systems and methods for copying a diversity of hologram prescriptions from a common master in accordance with various embodiments of the invention are illustrated. One embodiment includes a method of contact copying a hologram from a master. The method includes steps for providing a light source, a master grating encoding a first grating prescription, a substrate supporting a layer of holographic recording material, and a wavefront modifying component, forming a first wavefront from the light source, reflecting the first wavefront from the wavefront modifying component to provide a second wavefront, diffracting the second wavefront to provide diffracted light with a third wavefront and zero-order light with the second wavefront, interfering the third wavefront and the zero-order light at a contact image plane, and forming a hologram having a second grating prescription different from the first grating prescription.

公开(公告)号：US11175512B2

公开(公告)日：2021-11-16

申请号：US16854702

申请日：2020-04-21

Applicant: DigiLens Inc. ,  Rockwell Collins, Inc.

Inventor： Jonathan David Waldern ,  Milan Momcilo Popovich

IPC: G02B6/34 ,  G02B27/01 ,  G02F1/29 ,  G02B26/10 ,  G02F1/1334 ,  G02B27/48 ,  G02B5/18 ,  F21V8/00 ,  G03B13/02 ,  G02B26/08 ,  G03H1/22 ,  G03B21/10

Abstract: A light projection apparatus is provided comprising: a source of light; a switchable grating on a first substrate; and a diffractive optical element. Light is diffracted at least once by the switchable grating and is diffracted at least once by the DOE.