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).

  • Publication number: 20200110278
    Abstract: A method of depositing a variable thickness material includes providing a substrate and providing a shadow mask having a first region with a first aperture dimension to aperture periodicity ratio and a second region with a second aperture dimension to aperture periodicity ratio less than the first aperture dimension to aperture periodicity ratio. The method also includes positioning the shadow mask adjacent the substrate and performing a plasma deposition process on the substrate to deposit the variable thickness material. A layer thickness adjacent the first region is greater than a layer thickness adjacent the second region.
    Type: Application
    Filed: December 5, 2019
    Publication date: April 9, 2020
    Applicant: Magic Leap, Inc.
    Inventors: Shuqiang Yang, Vikramjit Singh, Kang Luo, Nai-Wen Pi, Frank Y. Xu
  • Patent number: 10585350
    Abstract: Micro- and nano-patterns in imprint layers formed on a substrate and lithographic methods for forming such layers. The layers include a plurality of structures, and a residual layer having a residual layer thickness (RLT) that extends from the surface of the substrate to a base of the structures, where the RLT varies across the surface of the substrate according to a predefined pattern.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: March 10, 2020
    Assignee: Molecular Imprints, Inc.
    Inventors: Vikramjit Singh, Kang Luo, Michael Nevin Miller, Shuqiang Yang, Frank Y. Xu
  • Publication number: 20200048143
    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: Application
    Filed: October 10, 2019
    Publication date: February 13, 2020
    Inventors: Mauro Melli, Christophe Peroz, Vikramjit Singh
  • Publication number: 20200041712
    Abstract: A method of manufacturing a waveguide having a combination of a binary grating structure and a blazed grating structure includes cutting a substrate off-axis, depositing a first layer on the substrate, and depositing a resist layer on the first layer. The resist layer includes a pattern. The method also includes etching the first layer in the pattern using the resist layer as a mask. The pattern includes a first region and a second region. The method further includes creating the binary grating structure in the substrate in the second region and creating the blazed grating structure in the substrate in the first region.
    Type: Application
    Filed: October 8, 2019
    Publication date: February 6, 2020
    Applicant: Magic Leap, Inc.
    Inventors: Christophe Peroz, Mauro Melli, Vikramjit Singh, David Jurbergs, Jeffrey Dean Schmulen, Zongxing Wang, Shuqiang Yang, Frank Y. Xu, Kang Luo, Marlon Edward Menezes, Michael Nevin Miller
  • Publication number: 20200033604
    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 23, 2019
    Publication date: January 30, 2020
    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: 20200033609
    Abstract: A method of generating a virtual image, including directing a light beam to a first side of an eyepiece, including transmitting the light beam into a first waveguide of the eyepiece; deflecting, by first diffractive elements of the first waveguide, a first portion of the light beam towards a second waveguide of the eyepiece, the first portion of the light beam associated with a first phase of light; deflecting, by protrusions on the first side of the eyepiece, a second portion of the light beam towards the second waveguide, the second portion of the light beam associated with a second phase of light differing from the first phase; and deflecting, by second diffractive elements of the second waveguide, some of the first and the second portions of the light beam to provide an exiting light beam associated with the virtual image that is based on the first and second phases.
    Type: Application
    Filed: October 2, 2019
    Publication date: January 30, 2020
    Inventors: Kang Luo, Vikramjit Singh, Frank Y. Xu
  • Patent number: 10527865
    Abstract: A method of fabricating a diffractive structure with varying diffractive element depth includes providing a shadow mask having a first region with a first aperture dimension to aperture periodicity ratio and a second region with a second aperture dimension to aperture periodicity ratio less than the first aperture dimension to aperture periodicity ratio. The method also includes positioning the shadow mask adjacent a substrate. The substrate comprises an etch mask corresponding to the diffractive structure. The method further includes exposing the substrate to an etchant, etching the substrate to form diffractive elements adjacent the first region having a first depth, and etching the substrate to form diffractive elements adjacent the second region having a second depth less than the first depth.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: January 7, 2020
    Assignee: Magic Leap, Inc.
    Inventors: Shuqiang Yang, Vikramjit Singh, Kang Luo, Nai-Wen Pi, Frank Y. Xu
  • Patent number: 10481317
    Abstract: A method of manufacturing a waveguide having a combination of a binary grating structure and a blazed grating structure includes cutting a substrate off-axis, depositing a first layer on the substrate, and depositing a resist layer on the first layer. The resist layer includes a pattern. The method also includes etching the first layer in the pattern using the resist layer as a mask. The pattern includes a first region and a second region. The method further includes creating the binary grating structure in the substrate in the second region and creating the blazed grating structure in the substrate in the first region.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: November 19, 2019
    Assignee: Magic Leap, Inc.
    Inventors: Christophe Peroz, Mauro Melli, Vikramjit Singh, David Jurbergs, Jeffrey Dean Schmulen, Zongxing Wang, Shuqiang Yang, Frank Y. Xu, Kang Luo, Marlon Edward Menezes, Michael Nevin Miller
  • Patent number: 10473936
    Abstract: A method of generating a virtual image, including directing a light beam to a first side of an eyepiece, including transmitting the light beam into a first waveguide of the eyepiece; deflecting, by first diffractive elements of the first waveguide, a first portion of the light beam towards a second waveguide of the eyepiece, the first portion of the light beam associated with a first phase of light; deflecting, by protrusions on the first side of the eyepiece, a second portion of the light beam towards the second waveguide, the second portion of the light beam associated with a second phase of light differing from the first phase; and deflecting, by second diffractive elements of the second waveguide, some of the first and the second portions of the light beam to provide an exiting light beam associated with the virtual image that is based on the first and second phases.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: November 12, 2019
    Assignee: Molecular Imprints, Inc.
    Inventors: Kang Luo, Vikramjit Singh, Frank Y. Xu
  • Publication number: 20190317399
    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: Application
    Filed: June 27, 2019
    Publication date: October 17, 2019
    Inventors: Vikramjit Singh, Michael N. Miller, Frank Y. Xu, Christopher Fleckenstein
  • Patent number: 10444422
    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: September 15, 2017
    Date of Patent: October 15, 2019
    Assignee: Molecular Imprints, Inc.
    Inventors: Frank Y. Xu, Michael Nevin Miller, Kang Luo, Vikramjit Singh, Michael Klug
  • Patent number: 10442727
    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: January 4, 2018
    Date of Patent: October 15, 2019
    Assignee: Magic Leap, Inc.
    Inventors: Mauro Melli, Christophe Peroz, Vikramjit Singh
  • Patent number: 10444419
    Abstract: A device includes an input coupling grating having a first grating structure characterized by a first set of grating parameters. The input coupling grating is configured to receive light from a light source. The device also includes an expansion grating having a second grating structure characterized by a second set of grating parameters varying in at least two dimensions. The second grating structure is configured to receive light from the input coupling grating. The device further includes an output coupling grating having a third grating structure characterized by a third set of grating parameters. The output coupling grating is configured to receive light from the expansion grating and to output light to a viewer.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: October 15, 2019
    Assignee: Magic Leap, Inc.
    Inventors: Samarth Bhargava, Robert D. TeKolste, Victor K. Liu, Christophe Peroz, Pierre St. Hilaire, Evgeni Poliakov, Jason Schaefer, Mauro Melli, Melanie West, Kang Luo, Vikramjit Singh, Frank Y. Xu
  • Publication number: 20190302611
    Abstract: Micro- and nano-patterns in imprint layers formed on a substrate and lithographic methods for forming such layers. The layers include a plurality of structures, and a residual layer having a residual layer thickness (RLT) that extends from the surface of the substrate to a base of the structures, where the RLT varies across the surface of the substrate according to a predefined pattern.
    Type: Application
    Filed: March 18, 2019
    Publication date: October 3, 2019
    Inventors: Vikramjit Singh, Kang Luo, Michael Nevin Miller, Shuqiang Yang, Frank Y. Xu
  • Patent number: 10379438
    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: January 31, 2018
    Date of Patent: August 13, 2019
    Assignee: Molecular Imprints, Inc.
    Inventors: Vikramjit Singh, Michael N. Miller, Frank Y. Xu, Christopher Fleckenstein
  • Publication number: 20190227375
    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: Application
    Filed: October 25, 2018
    Publication date: July 25, 2019
    Inventors: Chulwoo Oh, Ravi Kumar Komanduri, Roy Patterson, Charles Scott Carden, Michael Nevin Miller, Vikramjit Singh
  • Publication number: 20190227211
    Abstract: Architectures are provided for selectively incoupling one or more streams of light from a multiplexed light stream into a waveguide. The multiplexed light stream can have light with different characteristics (e.g., different wavelengths and/or different polarizations). The waveguide can comprise in-coupling elements that can selectively couple one or more streams of light from the multiplexed light stream into the waveguide while transmitting one or more other streams of light from the multiplexed light stream.
    Type: Application
    Filed: March 29, 2019
    Publication date: July 25, 2019
    Inventors: Michael Anthony Klug, Brian T. Schowengerdt, Michael Nevin Miller, Vikramjit Singh, Christophe Peroz, Pierre St. Hilaire, Jie Sun
  • Publication number: 20190217321
    Abstract: A grit boot mask tool including an enclosure to receive at least a portion of a blade and a door. A lock assembly that retains the door to the enclosure. The lock assembly provides for rotating a latch to retain the door to the enclosure.
    Type: Application
    Filed: January 15, 2018
    Publication date: July 18, 2019
    Applicant: United Technologies Corporation
    Inventor: Vikramjit Singh
  • Publication number: 20190170932
    Abstract: Techniques are described for using confinement structures and/or pattern gratings to reduce or prevent the wicking of sealant polymer (e.g., glue) into the optically active areas of a multi-layered optical assembly. A multi-layered optical structure may include multiple layers of substrate imprinted with waveguide grating patterns. The multiple layers may be secured using an edge adhesive, such as a resin, epoxy, glue, and so forth. A confinement structure such as an edge pattern may be imprinted along the edge of each layer to control and confine the capillary flow of the edge adhesive and prevent the edge adhesive from wicking into the functional waveguide grating patterns of the layers. Moreover, the edge adhesive may be carbon doped or otherwise blackened to reduce the reflection of light off the edge back into the interior of the layer, thus improving the optical function of the assembly.
    Type: Application
    Filed: February 7, 2019
    Publication date: June 6, 2019
    Inventors: Michael Nevin Miller, Frank Y. Xu, Vikramjit Singh, Eric C. Browy, Jason Schaefer, Robert D. TeKolste, Victor Kai Liu, Samarth Bhargava, Jeffrey Dean Schmulen, Brian T. Schowengerdt
  • Publication number: 20190137777
    Abstract: A method of fabricating a diffractive structure with varying diffractive element depth includes providing a shadow mask having a first region with a first aperture dimension to aperture periodicity ratio and a second region with a second aperture dimension to aperture periodicity ratio less than the first aperture dimension to aperture periodicity ratio. The method also includes positioning the shadow mask adjacent a substrate. The substrate comprises an etch mask corresponding to the diffractive structure. The method further includes exposing the substrate to an etchant, etching the substrate to form diffractive elements adjacent the first region having a first depth, and etching the substrate to form diffractive elements adjacent the second region having a second depth less than the first depth.
    Type: Application
    Filed: November 6, 2018
    Publication date: May 9, 2019
    Applicant: Magic Leap, Inc.
    Inventors: Shuqiang Yang, Vikramjit Singh, Kang Luo, Nai-Wen Pi, Frank Y. Xu