Patents by Inventor Vikramjit Singh

Vikramjit Singh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11281109
    Abstract: An imprint lithography method of configuring an optical layer includes selecting one or more parameters of a nanolayer to be applied to a substrate for changing an effective refractive index of the substrate and imprinting the nanolayer on the substrate to change the effective refractive index of the substrate such that a relative amount of light transmittable through the substrate is changed by a selected amount.
    Type: Grant
    Filed: April 5, 2021
    Date of Patent: March 22, 2022
    Assignee: Magic Leap, Inc.
    Inventors: Vikramjit Singh, Michael Nevin Miller, Frank Y. Xu, Shuqiang Yang
  • Publication number: 20220075118
    Abstract: Recesses are formed on a front side and a rear side of a waveguide. A solid porogen material is spun onto the front side and the rear side and fills the recesses. First front and rear cap layers are then formed on raised formations of the waveguide and on the solid porogen material. The entire structure is then heated and the solid porogen material decomposes to a porogen gas. The first front and rear cap layers are porous to allow the porogen gas to escape and air to enter into the recesses. The air maximizes a difference in refractive indices between the high-index transparent material of the waveguide and the air to promote reflection in the waveguide from interfaces between the waveguide and the air.
    Type: Application
    Filed: December 20, 2019
    Publication date: March 10, 2022
    Applicant: Magic Leap, Inc.
    Inventors: Xiaopei DENG, Vikramjit SINGH, Shuqiang YANG, Kang LUO, Nai-Wen PI, Frank Y. XU
  • Patent number: 11254606
    Abstract: Plasma etching processes for forming patterns in high refractive index glass substrates, such as for use as waveguides, are provided herein. The substrates may be formed of glass having a refractive index of greater than or equal to about 1.65 and having less than about 50 wt % SiO2. The plasma etching processes may include both chemical and physical etching components. In some embodiments, the plasma etching processes can include forming a patterned mask layer on at least a portion of the high refractive index glass substrate and exposing the mask layer and high refractive index glass substrate to a plasma to remove high refractive index glass from the exposed portions of the substrate. Any remaining mask layer is subsequently removed from the high refractive index glass substrate. The removal of the glass forms a desired patterned structure, such as a diffractive grating, in the high refractive index glass substrate.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: February 22, 2022
    Assignee: Magic Leap, Inc.
    Inventors: Mauro Melli, Christophe Peroz, Vikramjit Singh
  • Publication number: 20220035091
    Abstract: A multi-waveguide optical structure, including multiple waveguides stacked to intercept light passing sequentially through each waveguide, each waveguide associated with a differing color and a differing depth of plane, each waveguide including: a first adhesive layer, a substrate having a first index of refraction, and a patterned layer positioned such that the first adhesive layer is between the patterned layer and the substrate, the first adhesive layer providing adhesion between the patterned layer and the substrate, the patterned layer having a second index of refraction less than the first index of refraction, the patterned layer defining a diffraction grating, wherein a field of view associated with the waveguide is based on the first and the second indices of refraction.
    Type: Application
    Filed: October 19, 2021
    Publication date: February 3, 2022
    Inventors: Frank Y. Xu, Michael Nevin Miller, Kang Luo, Vikramjit Singh, Michael Klug
  • Patent number: 11237479
    Abstract: An imprint lithography method of configuring an optical layer includes depositing a set of droplets atop a side of a substrate in a manner such that the set of droplets do not contact a functional pattern formed on the substrate. The imprint lithography method further includes curing the set of droplets to form a spacer layer associated with the side of the substrate and of a height selected such that the spacer layer can support a surface adjacent the substrate and spanning the set of droplets at a position spaced apart from the functional pattern.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: February 1, 2022
    Assignee: Molecular Imprints, Inc.
    Inventors: Vikramjit Singh, Michael N. Miller, Frank Y. Xu, Christopher Fleckenstein
  • Patent number: 11231612
    Abstract: A display device comprises a waveguide configured to guide light in a lateral direction parallel to an output surface of the waveguide. The waveguide is further configured to outcouple the guided light through the output surface. The display device additionally comprises a broadband adaptive lens assembly configured to incouple and to diffract therethrough the outcoupled light from the waveguide. The broadband adaptive lens assembly comprises a first waveplate lens comprising a liquid crystal (LC) layer arranged such that the waveplate lens has birefringence (?n) that varies in a radially outward direction from a central region of the first waveplate lens and configured to diffract the outcoupled light at a diffraction efficiency greater than 90% within a wavelength range including at least 450 nm to 630 nm. The broadband adaptive lens assembly is configured to be selectively switched between a plurality of states having different optical powers.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: January 25, 2022
    Assignee: Magic Leap, Inc.
    Inventors: Chulwoo Oh, Ravi Kumar Komanduri, Roy Matthew Patterson, Charles Scott Carden, Michael Nevin Miller, Vikramjit Singh
  • Patent number: 11199658
    Abstract: Methods for singulating an optical waveguide material at a contour include directing a first laser beam onto a first side of the optical waveguide material to generate a first group of perforations in the optical waveguide material. A second laser beam is directed onto a second side of the optical waveguide material to generate a second group of perforations in the optical waveguide material. The second side is opposite the first side. The first group of perforations and the second group of perforations define a perforation zone at the contour. A third laser beam is directed at the perforation zone to singulate the optical waveguide material at the perforation zone.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: December 14, 2021
    Assignee: Magic Leap, Inc.
    Inventors: Arturo Manuel Martinez, Jr., Vikramjit Singh, Michal Beau Dennison Vaughn, Joseph Christopher Sawicki
  • Publication number: 20210378333
    Abstract: Provided are various gloves and protective articles with improved donning characteristics. The glove comprises an interior surface, and a polymer system coating the interior surface. The polymer system comprises one or more first polymers, each including an average particle size between 100 nanometers (nm) to 400 nm. The polymer system further comprises one or more second polymers, each including an average particle size in excess of 500 nm. The one or more first polymers may comprise a combination of one or more polymers including: butadiene based polymer and copolymer latices, isoprene based polymer and copolymer latices, copolymer latices prepared from styrene and acrylic monomers, and polyurethane copolymers. The one or more second polymers may include vinyl acetate polymers. The glove may be an elastomeric rubber glove coated with the polymer system in an amount between 0.0004 grams and 0.0016 grams on a dry basis.
    Type: Application
    Filed: May 27, 2019
    Publication date: December 9, 2021
    Applicant: YTY Industry Sdn Bhd
    Inventors: Monichan Puthuvelil Mathew, Vikramjit Singh Hora
  • Publication number: 20210364806
    Abstract: An eyepiece for a head-mounted display includes one or more first waveguides arranged to receive light from a spatial light modulator at a first edge, guide at least some of the received light to a second edge opposite the first edge, and extract at least some of the light through a face of the one or more first waveguides between the first and second edges. The eyepiece also includes a second waveguide positioned to receive light exiting the one or more first waveguides at the second edge and guide the received light to one or more light absorbers.
    Type: Application
    Filed: August 3, 2021
    Publication date: November 25, 2021
    Inventors: Fahri Yaras, Eric C. Browy, Victor Kai Liu, Samarth Bhargava, Vikramjit Singh, Michal Beau Dennison Vaughn, Joseph Christopher Sawicki
  • Patent number: 11181681
    Abstract: A multi-waveguide optical structure, including multiple waveguides stacked to intercept light passing sequentially through each waveguide, each waveguide associated with a differing color and a differing depth of plane, each waveguide including: a first adhesive layer, a substrate having a first index of refraction, and a patterned layer positioned such that the first adhesive layer is between the patterned layer and the substrate, the first adhesive layer providing adhesion between the patterned layer and the substrate, the patterned layer having a second index of refraction less than the first index of refraction, the patterned layer defining a diffraction grating, wherein a field of view associated with the waveguide is based on the first and the second indices of refraction.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: November 23, 2021
    Assignee: Molecular Imprints, Inc.
    Inventors: Frank Y. Xu, Michael Nevin Miller, Kang Luo, Vikramjit Singh, Michael Klug
  • Publication number: 20210356670
    Abstract: An eyepiece waveguide includes a set of waveguide layers having a world side and a user side. The eyepiece waveguide also includes a first cover plate having a first optical power and disposed adjacent the world side of the set of waveguide layers and a second cover plate having a second optical power and disposed adjacent the user side of the set of waveguide layers.
    Type: Application
    Filed: May 13, 2021
    Publication date: November 18, 2021
    Applicant: Magic Leap, Inc.
    Inventors: Chulwoo Oh, Ravi Kumar Komanduri, Vikramjit Singh, Shuqiang Yang, Frank Y. Xu
  • Publication number: 20210341775
    Abstract: An optical device includes a liquid crystal layer having a first plurality of liquid crystal molecules arranged in a first pattern and a second plurality of liquid crystal molecules arranged in a second pattern. The first and the second pattern are separated from each other by a distance of about 20 nm and about 100 nm along a longitudinal or a transverse axis of the liquid crystal layer. The first and the second plurality of liquid crystal molecules are configured as first and second grating structures that can redirect light of visible or infrared wavelengths.
    Type: Application
    Filed: July 19, 2021
    Publication date: November 4, 2021
    Inventors: Chulwoo Oh, Mauro Melli, Christophe Peroz, Vikramjit Singh, Frank Xu, Michael Anthony Klug
  • Publication number: 20210341661
    Abstract: Methods of manufacturing a liquid crystal device including depositing a layer of liquid crystal material on a substrate and imprinting a pattern on the layer of liquid crystal material using an imprint template are disclosed. The liquid crystal material can be jet deposited. The imprint template can include surface relief features, Pancharatnam-Berry Phase Effect (PBPE) structures or diffractive structures. The liquid crystal device manufactured by the methods described herein can be used to manipulate light, such as for beam steering, wavefront shaping, separating wavelengths and/or polarizations, and combining different wavelengths and/or polarizations.
    Type: Application
    Filed: July 19, 2021
    Publication date: November 4, 2021
    Inventors: Michael Anthony Klug, Brian T. Schowengerdt, Michael Nevin Miller, Vikramjit Singh, Christophe Peroz, Pierre St. Hilaire, Jie Sun
  • Publication number: 20210341744
    Abstract: Display devices include waveguides with in-coupling optical elements that mitigate re-bounce of in-coupled light to improve overall in-coupling efficiency and/or uniformity. A waveguide receives light from a light source and/or projection optics and includes an in-coupling optical element that in-couples the received light to propagate by total internal reflection in a propagation direction within the waveguide. Once in-coupled into the waveguide the light may undergo re-bounce, in which the light reflects off a waveguide surface and, after the reflection, strikes the in-coupling optical element. Upon striking the in-coupling optical element, the light may be partially absorbed and/or out-coupled by the optical element, thereby effectively reducing the amount of in-coupled light propagating through the waveguide.
    Type: Application
    Filed: July 19, 2021
    Publication date: November 4, 2021
    Inventors: Jeffrey Dean Schmulen, Neal Paul Ricks, Samarth Bhargava, Kevin Messer, Victor Kai Liu, Matthew Grant Dixon, Xiaopei Deng, Marlon Edward Menezes, Shuqiang Yang, Vikramjit Singh, Kang Luo, Frank Y. Xu
  • Publication number: 20210311298
    Abstract: Embodiments of the present disclosure are directed to an optical device, such as an eyepiece, including multiple layers of waveguides. The optical device can include an edge sealant for reducing light contamination, a lamination darn to restrict the wicking of the edge sealant between layers of the optical device, and venting gap (s) in the sealant and darn to allow air flow between the exterior and interior of the eyepiece. The gap(s) allow outgassing from the interior of the eyepiece of unreacted polymer and/or accumulated moisture, to prevent defect accumulation caused by chemical reaction of outgassed chemicals with the (e.g., ionic, acidic, etc.) surface of the eyepiece layers. The gap(s) also prevent pressure differences which may physically deform the eyepiece over time.
    Type: Application
    Filed: July 22, 2019
    Publication date: October 7, 2021
    Inventors: Wendong Xing, Vikramjit Singh, Neal Paul Ricks, Jeffrey Dean Schmulen, Emory D. Carroll, K. Brent Binkley, Frank Y. Xu, Thomas Mercier, William Hudson Welch, Michael Anthony Klug
  • Publication number: 20210294103
    Abstract: Very high refractive index (n>2.2) lightguide substrates enable the production of 70° field of view eyepieces with all three color primaries in a single eyepiece layer. Disclosed herein are viewing optics assembly architectures that make use of such eyepieces to reduce size and cost, simplifying manufacturing and assembly, and better-accommodating novel microdisplay designs.
    Type: Application
    Filed: March 12, 2019
    Publication date: September 23, 2021
    Inventors: Michael Anthony Klug, Kevin Richard Curtis, Vikramjit Singh, Kang Luo, Michal Beau Dennison Vaughn, Samarth Bhargava, Shuqiang Yang, Michael Nevin Miller, Frank Y. Xu, Kevin Messer, Robert Dale Tekolste
  • Publication number: 20210271070
    Abstract: An eyepiece includes a substrate and an in-coupling grating patterned on a single side of the substrate. A first grating coupler is patterned on the single side of the substrate and has a first grating pattern. The first grating coupler is optically coupled to the in-coupling grating. A second grating coupler is patterned on the single side of the substrate adjacent to the first grating coupler. The second grating coupler has a second grating pattern different from the first grating pattern. The second grating coupler is optically coupled to the in-coupling grating.
    Type: Application
    Filed: May 3, 2021
    Publication date: September 2, 2021
    Inventors: Kang Luo, Vikramjit Singh, Nai-Wen Pi, Shuqiang Yang, Frank Y. Xu
  • Patent number: 11086128
    Abstract: An eyepiece for a head-mounted display includes one or more first waveguides arranged to receive light from a spatial light modulator at a first edge, guide at least some of the received light to a second edge opposite the first edge, and extract at least some of the light through a face of the one or more first waveguides between the first and second edges. The eyepiece also includes a second waveguide positioned to receive light exiting the one or more first waveguides at the second edge and guide the received light to one or more light absorbers.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: August 10, 2021
    Assignee: Magic Leap, Inc.
    Inventors: Fahri Yaras, Eric C. Browy, Victor Kai Liu, Samarth Bhargava, Vikramjit Singh, Michal Beau Dennison Vaughn, Joseph Christopher Sawicki
  • Publication number: 20210223700
    Abstract: An imprint lithography method of configuring an optical layer includes selecting one or more parameters of a nanolayer to be applied to a substrate for changing an effective refractive index of the substrate and imprinting the nanolayer on the substrate to change the effective refractive index of the substrate such that a relative amount of light transmittable through the substrate is changed by a selected amount.
    Type: Application
    Filed: April 5, 2021
    Publication date: July 22, 2021
    Inventors: Vikramjit Singh, Michael Nevin Miller, Frank Y. Xu, Shuqiang Yang
  • Patent number: 11067732
    Abstract: Methods of manufacturing a liquid crystal device including depositing a layer of liquid crystal material on a substrate and imprinting a pattern on the layer of liquid crystal material using an imprint template are disclosed. The liquid crystal material can be jet deposited. The imprint template can include surface relief features, Pancharatnam-Berry Phase Effect (PBPE) structures or diffractive structures. The liquid crystal device manufactured by the methods described herein can be used to manipulate light, such as for beam steering, wavefront shaping, separating wavelengths and/or polarizations, and combining different wavelengths and/or polarizations.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: July 20, 2021
    Assignee: Magic Leap, Inc.
    Inventors: Michael Anthony Klug, Brian T. Schowengerdt, Michael Nevin Miller, Vikramjit Singh, Christophe Peroz, Pierre St. Hilaire, Jie Sun