公开(公告)号：US20200319404A1

公开(公告)日：2020-10-08

申请号：US16906872

申请日：2020-06-19

Applicant: DigiLens Inc.

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

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

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.

公开(公告)号：US10747982B2

公开(公告)日：2020-08-18

申请号：US16577607

申请日：2019-09-20

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

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

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：US20200247017A1

公开(公告)日：2020-08-06

申请号：US16783019

申请日：2020-02-05

Applicant: DigiLens Inc.

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

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

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：US10725312B2

公开(公告)日：2020-07-28

申请号：US16352696

申请日：2019-03-13

Applicant: DigiLens Inc.

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

IPC: G02B6/26 ,  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.

公开(公告)号：US10591756B2

公开(公告)日：2020-03-17

申请号：US15562755

申请日：2016-03-30

Applicant: DigiLens Inc.

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

IPC: G02F1/13 ,  G02B26/08 ,  G02F1/29 ,  G02B5/18 ,  G02B27/42

Abstract: A contact image sensor having a waveguiding structure for propagating light in a first direction including, in series, a first clad medium, a first core, a switchable grating clad, a second core, and a second clad medium sandwiched by transparent substrates, patterned parallel electrode elements orthogonally traversing the waveguides, a light source, a platen and a detector. Switchable grating regions overlapped by a first voltage-addressed electrode element diffract TIR light from the first core towards the platen. Switchable grating region overlapped by a second voltage-addressed electrode element diffract TIR light reflected from the platen into a TIR path within the second core.

公开(公告)号：US20200081317A1

公开(公告)日：2020-03-12

申请号：US16664659

申请日：2019-10-25

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

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

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：US10459311B2

公开(公告)日：2019-10-29

申请号：US16281969

申请日：2019-02-21

Applicant: DigiLens Inc.

Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

IPC: G02F1/29 ,  G06K9/00 ,  H01L27/146 ,  G02F1/1334 ,  G02B27/42 ,  G02B6/12 ,  G02B26/08 ,  G06F3/042 ,  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：US10459145B2

公开(公告)日：2019-10-29

申请号：US15558409

申请日：2016-03-15

Applicant: DigiLens Inc.

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

IPC: G02B6/28 ,  G02B6/26 ,  F21V8/00 ,  G02B27/01 ,  G02F1/1334

Abstract: A waveguide apparatus has in combination: a light pipe with an optical axis for guiding light therethrough; a light coupling element in optical contact with an elongate portion of the reflecting surface of the light guide; and an optical waveguide in optical contact with the coupling element.

公开(公告)号：US10359736B2

公开(公告)日：2019-07-23

申请号：US15502596

申请日：2015-08-05

Applicant: DigiLens Inc.

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

IPC: G03H1/20 ,  G03H1/02 ,  G03H1/26

Abstract: A method for producing holograms with a multiplicity of holographic prescriptions from a single master is provided. A multiplicity of holographic substrates each having a first hologram is stacked on a second holographic recording medium substrate. The first hologram is designed to diffract light from a first direction into a second direction. When expose to illumination from the first direction zero order and diffracted light from each first hologram interfere in the second holographic recording medium substrate forming a second hologram. The second hologram is then copied into a third holographic recording medium substrate to provide the final copy hologram.

公开(公告)号：US20190212597A1

公开(公告)日：2019-07-11

申请号：US16242943

申请日：2019-01-08

Applicant: DigiLens, Inc.

Inventor： Jonathan David Waldern ,  Shibu Abraham

IPC: G02F1/1334 ,  G02F1/13 ,  C09K19/54 ,  G03F7/00

CPC classification number: G02F1/13342 ,  C09K19/544 ,  C09K2019/521 ,  G02F1/1326 ,  G03F7/001

Abstract: Photopolymerizable materials and in particular holographic polymer dispersed liquid crystal materials and processes for fabricating holographic waveguide devices from such materials are provided. Materials and formulations of photopolymerizable materials are sufficiently low haze to allow for the omission of adhesives from within the cell of the holographic waveguide devices. The photopolymerizable materials are used in association with methods of manufacturing holographic waveguides such that photopolymerizable materials may be used as an adhesive material.