Patents by Inventor Mohammadreza Khorasaninejad

Mohammadreza Khorasaninejad 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: 20220283411
    Abstract: A method of fabricating a visible spectrum optical component includes: providing a substrate; forming a resist layer over a surface of the substrate; patterning the resist layer to form a patterned resist layer defining openings exposing portions of the surface of the substrate; performing deposition to form a dielectric film over the patterned resist layer and over the exposed portions of the surface of the substrate, wherein a top surface of the dielectric film is above a top surface of the patterned resist layer; removing a top portion of the dielectric film to expose the top surface of the patterned resist layer and top surfaces of dielectric units within the openings of the patterned resist layer; and removing the patterned resist layer to retain the dielectric units over the substrate.
    Type: Application
    Filed: May 25, 2022
    Publication date: September 8, 2022
    Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Robert C. DEVLIN, Mohammadreza KHORASANINEJAD, Federico CAPASSO, Hongkun PARK, Alexander Arthur HIGH
  • Publication number: 20220197040
    Abstract: An example head-mounted display device includes a plurality of optical elements in optical communication. The optical elements are configured to project an image in a field of view of a user wearing the head-mounted display device. A first optical element is configured to receive light from a second optical element. The first optical element defines a grating at along a periphery of the first optical element. The grating includes a plurality of protrusions extending from a base portion of the first optical element. The protrusions include a first material having a first optical dispersion profile for visible wavelengths of light. The grating also includes a second material disposed between at least some of the plurality of protrusions along the base portion of the first optical element. The second material has a second optical dispersion profile for visible wavelengths of light.
    Type: Application
    Filed: March 10, 2022
    Publication date: June 23, 2022
    Inventors: Pierre St. Hilaire, Mohammadreza Khorasaninejad, Dianmin Lin
  • Patent number: 11366296
    Abstract: A method of fabricating a visible spectrum optical component includes: providing a substrate; forming a resist layer over a surface of the substrate; patterning the resist layer to form a patterned resist layer defining openings exposing portions of the surface of the substrate; performing deposition to form a dielectric film over the patterned resist layer and over the exposed portions of the surface of the substrate, wherein a top surface of the dielectric film is above a top surface of the patterned resist layer; removing a top portion of the dielectric film to expose the top surface of the patterned resist layer and top surfaces of dielectric units within the openings of the patterned resist layer; and removing the patterned resist layer to retain the dielectric units over the substrate.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: June 21, 2022
    Assignees: PRESIDENT AND FELLOWS OF HARVARD COLLEGE, THE CHARLES STARK DRAPER LABORATORY, INC.
    Inventors: Robert C. Devlin, Mohammadreza Khorasaninejad, Federico Capasso, Hongkun Park, Alexander Arthur High
  • Patent number: 11320641
    Abstract: The optical imaging apparatus includes a metasurface lens including a substrate and a plurality of nano-structures patterned on a first side of the substrate. The optical imaging apparatus further includes imaging optics disposed in a spaced apart relationship with a second side of the substrate. The second side is opposite the first side on which the nano-structures are patterned. A surface of the imaging optics and the second side of the substrate define a space for accommodating an immersion fluid. The metasurface lens is configured to direct light incident on the plurality of nano-structures towards the imaging optics through the space accommodating the immersion fluid.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: May 3, 2022
    Assignee: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Wei-Ting Chen, Alexander Yutong Zhu, Mohammadreza Khorasaninejad, Zhujun Shi, Federico Capasso, Vyshakh Sanjeev
  • Patent number: 11320668
    Abstract: Some implementations of the disclosure describe a display system for optically fusing light, comprising: multiple image sources configured to emit light corresponding to multiple respective image portions; a bent reflector comprising multiple segments, each segment configured to receive the light emitted by a corresponding image source, and reflect the light to a back reflector that has a bend region including a first of the segments attached to a second of the segments at an angle; and the back reflector, the back reflector configured to: modify a polarization or an angular profile of the light reflected by each segment; and after modifying the polarization or the angular profile, reflect the light back to the segments such that the light passes through the segments, wherein the angle is configured such that after the light reflected by the back reflector passes through the segments, the image portions are tiled or fused.
    Type: Grant
    Filed: July 21, 2021
    Date of Patent: May 3, 2022
    Assignee: Brelyon, Inc.
    Inventors: Mohammadreza Khorasaninejad, Barmak Heshmat Dehkordi, I-Hung Ting
  • Patent number: 11300791
    Abstract: An example head-mounted display device includes a plurality of optical elements in optical communication. The optical elements are configured to project an image in a field of view of a user wearing the head-mounted display device. A first optical element is configured to receive light from a second optical element. The first optical element defines a grating at along a periphery of the first optical element. The grating includes a plurality of protrusions extending from a base portion of the first optical element. The protrusions include a first material having a first optical dispersion profile for visible wavelengths of light. The grating also includes a second material disposed between at least some of the plurality of protrusions along the base portion of the first optical element. The second material has a second optical dispersion profile for visible wavelengths of light.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: April 12, 2022
    Assignee: Magic Leap, Inc.
    Inventors: Pierre St. Hilaire, Mohammadreza Khorasaninejad, Dianmin Lin
  • Publication number: 20220107500
    Abstract: Some implementations of the disclosure relate to a display system, including: a display that emits light corresponding to an image; and one or more optical control components configured to receive the light emitted by the display and modify one or more properties associated with the light as it passes through the one or more optical control components. Each optical control component includes a polarization-dependent metasurface. The one or more properties include: a direction the light travels, a position of the light, an angular distribution of the light, a perceived depth of the image, or a wavelength of the light that is filtered. Each optical control component is configured to dynamically switch between a first state where the optical control component modifies at least one property associated with the light, and a second state where the optical control component does not modify the at least one property.
    Type: Application
    Filed: October 5, 2021
    Publication date: April 7, 2022
    Applicant: Brelyon, Inc.
    Inventors: Mohammadreza Khorasaninejad, Barmak Heshmat Dehkordi
  • Publication number: 20220099976
    Abstract: A display system includes a waveguide assembly having a plurality of waveguides, each waveguide associated with an in-coupling optical element configured to in-couple light into the associated waveguide. A projector outputs light from one or more spatially-separated pupils, and at least one of the pupils outputs light of two different ranges of wavelengths. The in-coupling optical elements for two or more waveguides are inline, e.g. vertically aligned, with each other so that the in-coupling optical elements are in the path of light of the two different ranges of wavelengths. The in-coupling optical element of a first waveguide selectively in-couples light of one range of wavelengths into the waveguide, while the in-coupling optical element of a second waveguide selectively in-couples light of another range of wavelengths. Absorptive color filters are provided forward of an in-coupling optical element to limit the propagation of undesired wavelengths of light to that in-coupling optical element.
    Type: Application
    Filed: January 29, 2020
    Publication date: March 31, 2022
    Inventors: Mohammadreza Khorasaninejad, Victor Kai Liu, Dianmin Lin, Christophe Peroz, Pierre St. Hilaire
  • Publication number: 20220057647
    Abstract: Some implementations of the disclosure describe a display system for optically fusing light, comprising: multiple image sources configured to emit light corresponding to multiple respective image portions; a bent reflector comprising multiple segments, each segment configured to receive the light emitted by a corresponding image source, and reflect the light to a back reflector that has a bend region including a first of the segments attached to a second of the segments at an angle; and the back reflector, the back reflector configured to: modify a polarization or an angular profile of the light reflected by each segment; and after modifying the polarization or the angular profile, reflect the light back to the segments such that the light passes through the segments, wherein the angle is configured such that after the light reflected by the back reflector passes through the segments, the image portions are tiled or fused.
    Type: Application
    Filed: July 21, 2021
    Publication date: February 24, 2022
    Applicant: Brelyon, Inc.
    Inventors: Mohammadreza Khorasaninejad, Barmak Heshmat Dehkordi, I-Hung Ting
  • Patent number: 11194082
    Abstract: An optical device includes: (1) a substrate; and (2) multiple meta-lenses disposed on the substrate, each meta-lens of the meta-lenses including multiple nanofins disposed on a respective region of the substrate, the nanofins together specifying a phase profile of the meta-lens.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: December 7, 2021
    Assignee: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Alexander Yutong Zhu, Wei-Ting Chen, Mohammadreza Khorasaninejad, Jaewon Oh, Muhammad Aun Abbas Zaidi, Robert C. Devlin, Federico Capasso
  • Patent number: 11092717
    Abstract: A meta-lens having a phase profile includes a substrate and a plurality of nanostructures disposed on the substrate. Each individual nanostructure of the nanostructures imparts a light phase shift that varies depending on a location of the individual nanostructure on the substrate. The light phase shifts of the nanostructures define the phase profile of the meta-lens. The varying light phase shifts can be realized by, e.g., changing orientations of nanofins or changing diameters of nanopillars.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: August 17, 2021
    Assignee: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Federico Capasso, Wei-Ting Chen, Robert C. Devlin, Mohammadreza Khorasaninejad, Jaewon Oh, Alexander Yutong Zhu, Charles Roques-Carmes, Ishan Mishra
  • Publication number: 20210149082
    Abstract: An optical device comprises a metasurface including a plurality of nanostructures. The nanostructures define a phase profile and a group delay profile at a design wavelength. The phase profile and the group delay profile determine and control the functionalities and the chromatic dispersion of the metasurface.
    Type: Application
    Filed: May 31, 2018
    Publication date: May 20, 2021
    Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Wei Ting CHEN, Vyshakh SANJEEV, Alexander Yutong ZHU, Mohammadreza KHORASANINEJAD, Zhujun SHI, Federico CAPASSO
  • Publication number: 20210141146
    Abstract: Display devices include waveguides with metasurfaces as in-coupling and/or out-coupling optical elements. The metasurfaces may be formed on a surface of the waveguide and may include a plurality or an array of sub-wavelength-scale (e.g., nanometer-scale) protrusions. Individual protrusions may include horizontal and/or vertical layers of different materials which may have different refractive indices, allowing for enhanced manipulation of light redirecting properties of the metasurface. Some configurations and combinations of materials may advantageously allow for broadband metasurfaces. Manufacturing methods described herein provide for vertical and/or horizontal layers of different materials in a desired configuration or profile.
    Type: Application
    Filed: November 4, 2020
    Publication date: May 13, 2021
    Inventors: Mauro Melli, Mohammadreza Khorasaninejad, Christophe Peroz, Pierre St. Hilaire, Dianmin Lin
  • Publication number: 20210132272
    Abstract: An optical device includes: (1) a substrate; and (2) multiple meta-lenses disposed on the substrate, each meta-lens of the meta-lenses including multiple nanofins disposed on a respective region of the substrate, the nanofins together specifying a phase profile of the meta-lens.
    Type: Application
    Filed: December 19, 2017
    Publication date: May 6, 2021
    Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Alexander Yutong ZHU, Wei Ting CHEN, Mohammadreza KHORASANINEJAD, Jaewon OH, Aun ZAIDI, Robert Charles DEVLIN, Federico CAPASSO
  • Publication number: 20210109364
    Abstract: Multi-wavelength light is directed to an optic including a substrate and achromatic metasurface optical components deposited on a surface of the substrate. The achromatic metasurface optical components comprise a pattern of dielectric resonators. The dielectric resonators have nonperiodic gap distances between adjacent dielectric resonators; and each dielectric resonator has a width, w, that is distinct from the width of other dielectric resonators. A plurality of wavelengths of interest selected from the wavelengths of the multi-wavelength light are deflected with the achromatic metasurface optical components at a shared angle or to or from a focal point at a shared focal length.
    Type: Application
    Filed: September 23, 2020
    Publication date: April 15, 2021
    Applicant: President and Fellows of Harvard College
    Inventors: Francesco Aieta, Mikhail Kats, Patrice Genevet, Federico Capasso, Mohammadreza Khorasaninejad
  • Publication number: 20210109278
    Abstract: In some embodiments, a head-mounted, near-eye display system comprises a stack of waveguides having integral spacers separating the waveguides. The waveguides may each include diffractive optical elements that are formed simultaneously with the spacers by imprinting. The spacers are disposed on one major surface of each of the waveguides and indentations are provided on an opposite major surface of each of the waveguides. The indentations are sized and positioned to align with the spacers, thereby forming a self-aligned stack of waveguides. Tops of the spacers may be provided with light scattering features, anti-reflective coatings, and/or light absorbing adhesive to prevent light leakage between the waveguides. As seen in a top-down view, the spacers may be elongated along the same axis as the diffractive optical elements. The waveguides may include structures (e.g.
    Type: Application
    Filed: April 1, 2019
    Publication date: April 15, 2021
    Inventors: Christophe Peroz, Chieh Chang, Sharad D. Bhagat, Victor Kai Liu, Roy Matthew Patterson, David Carl Jurbergs, Mohammadreza Khorasaninejad, Ling Li, Michael Nevin Miller, Charles Scott Carden
  • Publication number: 20210068665
    Abstract: An endoscopic imaging device (e.g., a catheter) comprises a light-transmitting tubing, at least one optical fiber disposed in the light-transmitting tubing, and at least one metalens. The metalens is optically coupled to the optical fiber and is configured to focus light from the optical fiber, through the light-transmitting tubing, and to a target point located outside of the light-transmitting tubing. The metalens includes a plurality of nanostructures. The nanostructures define a phase profile that corrects astigmatism caused by the light-transmitting tubing.
    Type: Application
    Filed: December 12, 2018
    Publication date: March 11, 2021
    Applicants: PRESIDENT AND FELLOWS OF HARVARD COLLEGE, THE GENERAL HOSPITAL CORPORATION, PARTNERS HEALTHCARE
    Inventors: Hamid PAHLEVANINEZHAD, Mohammadreza KHORASANINEJAD, Yao-Wei HUANG, Zhujun SHI, Melissa SUTER, Federico CAPASSO
  • Publication number: 20210055557
    Abstract: An example head-mounted display device includes a plurality of optical elements in optical communication. The optical elements are configured to project an image in a field of view of a user wearing the head-mounted display device. A first optical element is configured to receive light from a second optical element. The first optical element defines a grating at along a periphery of the first optical element. The grating includes a plurality of protrusions extending from a base portion of the first optical element. The protrusions include a first material having a first optical dispersion profile for visible wavelengths of light. The grating also includes a second material disposed between at least some of the plurality of protrusions along the base portion of the first optical element. The second material has a second optical dispersion profile for visible wavelengths of light.
    Type: Application
    Filed: July 2, 2020
    Publication date: February 25, 2021
    Inventors: Pierre St. Hilaire, Mohammadreza Khorasaninejad, Dianmin Lin
  • Patent number: 10866360
    Abstract: A phase shift element includes a substrate and a dielectric ridge waveguide (DRW) disposed on the substrate. The DRW includes a dielectric material, and a width of the DRW is less than 500 nanometers (nm). A meta-grating includes a substrate and multiple dielectric ridge wave-guides (DRWs) disposed on the substrate.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: December 15, 2020
    Assignee: PRESIDENT AND FELLOWS OF HARVARD COLLEGE
    Inventors: Mohammadreza Khorasaninejad, Federico Capasso
  • Patent number: 10816815
    Abstract: Multi-wavelength light is directed to an optic including a substrate and achromatic metasurface optical components deposited on a surface of the substrate. The achromatic metasurface optical components comprise a pattern of dielectric resonators. The dielectric resonators have distances between adjacent dielectric resonators; and each dielectric resonator has a width, w, that is distinct from the width of other dielectric resonators. A plurality of wavelengths of interest selected from the wavelengths of the multi-wavelength light are deflected with the achromatic metasurface optical components at a shared angle or to or from a focal point at a shared focal length.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: October 27, 2020
    Assignee: President and Fellows of Harvard College
    Inventors: Francesco Aieta, Mikhail Kats, Patrice Genevet, Federico Capasso, Mohammadreza Khorasaninejad