Patents Assigned to DigiLens, Inc.
  • Publication number: 20190179153
    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.
    Type: Application
    Filed: February 15, 2019
    Publication date: June 13, 2019
    Applicant: DigiLens, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern, Alastair John Grant
  • Publication number: 20190170321
    Abstract: There is provided a colour sequential illumination device comprising in series: first and second light sources; a condenser lens; and a grating device. The grating device comprises at least one Bragg grating. The condenser lens directs light from the first and second sources into the grating device at first and second incidence angles respectively. The grating device diffracts light from the first and second sources into a common direction. Desirably, the Bragg gratings are Electrically Switchable Bragg Gratings. In one embodiment of the invention the light sources are Light Emitting Diodes. Alternatively lasers may be used.
    Type: Application
    Filed: December 3, 2018
    Publication date: June 6, 2019
    Applicant: DigiLens Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern
  • Publication number: 20190171031
    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.
    Type: Application
    Filed: January 17, 2019
    Publication date: June 6, 2019
    Applicant: DigiLens, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern
  • Publication number: 20190121027
    Abstract: A waveguide apparatus, comprises: disposed in at least one layer: an input coupler; a first fold grating; a second fold grating; an output coupler; and a source of light optically coupled to the waveguide providing at least first and second polarizations of the light and at least one wavelength. The input coupler is configured to cause the first polarization light to travel along a first total internal reflection (TIR) path and the second polarization light to travel along a second TIR path.
    Type: Application
    Filed: March 23, 2017
    Publication date: April 25, 2019
    Applicant: DigiLens, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern, Alastair John Grant
  • Publication number: 20190113829
    Abstract: Systems integrating display resolution-multiplication solutions can be implemented in a variety of different ways. In many embodiments, the system includes an image projector for projecting image light, an image processor for computing a native image and at least one image shifted in a predefined direction, and at least one switchable grating capable of being switched between diffracting and non-diffracting states. In some embodiments, the switchable grating is optically coupled to the image projector. In a number of embodiments, the switchable gratings have a first configuration for propagating the native image light and at least one other configuration for propagating shifted image light having an angular displacement corresponding to the image shift in a predefined direction. By displaying the native and shifted images sequentially within a human eye integration period, the display resolution can be multiplied.
    Type: Application
    Filed: October 16, 2018
    Publication date: April 18, 2019
    Applicant: DigiLens, Inc.
    Inventors: Jonathan David Waldern, Alastair John Grant, Milan Momcilo Popovich
  • Publication number: 20190113751
    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.
    Type: Application
    Filed: March 17, 2016
    Publication date: April 18, 2019
    Applicants: DigiLens, Inc., Rockwell Collins Inc.
    Inventors: Jonathan David Waldern, Milan Momcilo Popovich
  • Patent number: 10241330
    Abstract: An image generation device having: a spatial light modulator; a source of light; a beam deflector; an illumination waveguide and an image transport waveguide, each waveguide containing at least one switchable grating; and a coupler for directing scanned light into a first set of TIR paths in said illumination waveguide. A switchable grating in the illumination waveguide diffracts light onto the SLM, a switchable grating in the image transport waveguide diffracting image-modulated from the SLM into a waveguide path.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: March 26, 2019
    Assignees: DigiLens, Inc., Rockwell Collins, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern, Alastair John Grant
  • Patent number: 10234696
    Abstract: An apparatus for recording a holographic device comprises: a master hologram comprising a multiplicity of holographic elements each characterized by one of a predefined set of grating prescriptions; a transparent substrate supporting a layer of holographic material; and a light source. Each holographic element diffracts source light onto a predefined region of the layer. Each prescription modulates at least one of phase, amplitude, and angle of the light. There is further provided a method of recording a holographic device, comprising the steps of: providing said apparatus; exposing the master to illumination from the source; and diffracting light from each holographic element onto a predefined region of the layer.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: March 19, 2019
    Assignee: DigiLens, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern, John James Storey
  • Publication number: 20190072723
    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.
    Type: Application
    Filed: November 1, 2018
    Publication date: March 7, 2019
    Applicants: DigiLens, Inc., Rockwell Collins Inc.
    Inventors: Jonathan David Waldern, Alastair John Grant, Milan Momcilo Popovich, James H. Stanley, Robert D. Brown
  • Publication number: 20190064735
    Abstract: Typical waveguides rely on total internal reflection between the outer surfaces of substrates, which can make them highly susceptible to beam misalignment caused by nonplanarity of the substrates. In the manufacturing of the glass sheets commonly used for substrates, ripples can occur during the stretching and drawing of glass as it emerges from a furnace. Although glass manufacturers try to minimize ripples using predictions from mathematical models, it is difficult to totally eradicate the problem from the glass manufacturing process. Typically, these beam misalignments manifest themselves as image distortions and non-uniformities in the output illumination from the waveguide. Many embodiments of the invention are directed toward optically efficient, low cost solutions to the problem of controlling output image quality in waveguides manufactured using commercially available substrate glass and to the problem of compensating the image distortions and non-uniformity of curved waveguides.
    Type: Application
    Filed: August 30, 2018
    Publication date: February 28, 2019
    Applicant: DigiLens, Inc.
    Inventors: Jonathan David Waldern, Sihui He, Alastair John Grant, Milan Momcilo Popovich
  • Patent number: 10216061
    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.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: February 26, 2019
    Assignee: DigiLens, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern
  • Patent number: 10209517
    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.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: February 19, 2019
    Assignee: DigiLens, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern, Alastair John Grant
  • Publication number: 20190042827
    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.
    Type: Application
    Filed: October 1, 2018
    Publication date: February 7, 2019
    Applicant: DigiLens, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern
  • Publication number: 20190041634
    Abstract: An object tracker comprises: a source of light; at least one illumination waveguide optically coupled to said source continuing at least one grating lamina for diffracting said light towards an external object; at least one detector waveguide containing a grating lamina for in-coupling and deflecting a first polarization of light reflected from said object into a first waveguide direction and deflecting a second polarization of light reflected from said object into a second waveguide direction; at least one detector optically coupled to said detector waveguide operative to receive light propagating in said first waveguide direction; and at least one detector optically coupled to said detector waveguide operative to receive light propagating in said second waveguide direction.
    Type: Application
    Filed: February 3, 2017
    Publication date: February 7, 2019
    Applicant: DigiLens, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern, Alastair John Grant
  • Patent number: 10185154
    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.
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: January 22, 2019
    Assignee: DigiLens, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern
  • Publication number: 20180373115
    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.
    Type: Application
    Filed: April 2, 2018
    Publication date: December 27, 2018
    Applicants: DigiLens, Inc., Rockwell Collins, Inc.
    Inventors: Robert D. Brown, Alastair John Grant, Wyatt L. Hendrick, Milan Momcilo Popovich, James H. Stanley, Jonathan David Waldern
  • Patent number: 10156681
    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.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: December 18, 2018
    Assignees: DigiLens Inc., Rockwell Collins Inc.
    Inventors: Jonathan David Waldern, Alastair John Grant, Milan Momcilo Popovich, James H. Stanley, Robert D. Brown
  • Patent number: 10145533
    Abstract: There is provided a color sequential illumination device comprising in series: first and second light sources; a condenser lens; and a grating device. The grating device comprises at least one Bragg grating. The condenser lens directs light from the first and second sources into the grating device at first and second incidence angles respectively. The grating device diffracts light from the first and second sources into a common direction. Desirably, the Bragg gratings are Electrically Switchable Bragg Gratings. In one embodiment of the invention the light sources are Light Emitting Diodes. Alternatively lasers may be used.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: December 4, 2018
    Assignee: DigiLens, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern
  • Publication number: 20180284440
    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.
    Type: Application
    Filed: October 4, 2016
    Publication date: October 4, 2018
    Applicant: Digilens, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern, Alastair John Grant
  • Patent number: 10089516
    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.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: October 2, 2018
    Assignee: DigiLens, Inc.
    Inventors: Milan Momcilo Popovich, Jonathan David Waldern