Patents by Inventor Aravinda Kar

Aravinda Kar 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: 20220121002
    Abstract: An optical device may include an optical body having first and second opposing sides, and passageways extending between the first and second opposing sides. The optical device includes a mirror layer carried by the optical body adjacent the second opposing side, thermally conductive fingers extending in the passageways, and a heatsink carried by the optical body adjacent the first opposing side and coupled to the thermally conductive fingers.
    Type: Application
    Filed: October 19, 2021
    Publication date: April 21, 2022
    Inventors: Aravinda Kar, Chandraika Sugrim
  • Publication number: 20210331249
    Abstract: A laser-assisted microfluidics manufacturing process has been developed for the fabrication of additively manufactured structures. Roll-to-roll manufacturing is enhanced by the use of a laser-assisted electrospray printhead positioned above the flexible substrate. The laser electrospray printhead sprays microdroplets containing nanoparticles onto the substrate to form both thin-film and structural layers. As the substrate moves, the nanoparticles are sintered using a laser beam directed by the laser electrospray printhead onto the substrate.
    Type: Application
    Filed: July 2, 2021
    Publication date: October 28, 2021
    Inventors: Aravinda Kar, Ranganathan Kumar, Eduardo Castillo Orozco
  • Patent number: 11084100
    Abstract: A laser-assisted microfluidics manufacturing process has been developed for the fabrication of additively manufactured structures. Roll-to-roll manufacturing is enhanced by the use of a laser-assisted electrospray printhead positioned above the flexible substrate. The laser electrospray printhead sprays microdroplets containing nanoparticles onto the substrate to form both thin-film and structural layers. As the substrate moves, the nanoparticles are sintered using a laser beam directed by the laser electrospray printhead onto the substrate.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: August 10, 2021
    Assignee: University of Central Florida Research Foundation, Inc.
    Inventors: Aravinda Kar, Ranganathan Kumar, Eduardo Castillo Orozco
  • Patent number: 10876197
    Abstract: A composition of matter includes a substrate material (M) having a bulk portion and an outer surface integrated to the bulk portion. The outer surface includes a modified surface layer. The modified surface layer extends to a depth from the outer surface of at least 1 nm. The modified surface layer includes M and at least one other material (X) which is a metal or metal alloy. The modified surface layer has a 25° C. electrical conductivity which is at least 2.5% above or below a 25° C. electrical conductivity in the bulk portion of M. The composition of matter can be an article that includes a frequency selective surface-based metamaterial, and the plurality of modified surface portions can be a plurality of periodic surface elements that provide a resonant frequency.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: December 29, 2020
    Assignee: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Aravinda Kar, Rajan Vaidyanathan
  • Patent number: 10788373
    Abstract: An imaging device may include an RF source configured to irradiate an object with RF radiation, and an array of RE antenna elements. Each RF antenna element may include a loop bolometer configured to receive the RF radiation after interaction with the object. The imaging device may include a processor configured to generate an image based upon respective outputs from the array of RF antenna elements, and a display coupled to the processor and configured to display the image of the object.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: September 29, 2020
    Assignee: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Aravinda Kar, Jeffrey Jennings, Rajan Vaidyanathan
  • Patent number: 10732118
    Abstract: A detector is for identifying chemicals in a sample. The detector may include a photodetector comprising SiC semiconductor material and configured to have an acceptor energy band of range Ea??Ea to Ea+?Ea. The SiC semiconductor material may be doped with a dopant to exceed a threshold dopant concentration level. The photodetector may be configured to receive fluorescence information from the sample.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: August 4, 2020
    Assignees: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC., THE U.S.A. AS REPRESENTED BY THE SECRETARY OF THE NAVY
    Inventors: Chandraika Sugrim, Ranganathan Kumar, Aravinda Kar, Robert Burkhart
  • Publication number: 20200110034
    Abstract: A detector is for identifying chemicals in a sample. The detector may include a photodetector comprising SiC semiconductor material and configured to have an acceptor energy band of range Ea??Ea to Ea+?Ea. The SiC semiconductor material may be doped with a dopant to exceed a threshold dopant concentration level. The photodetector may be configured to receive fluorescence information from the sample.
    Type: Application
    Filed: October 9, 2019
    Publication date: April 9, 2020
    Inventors: Chandraika Sugrim, Ranganathan Kumar, Aravinda Kar, Robert Burkhart
  • Publication number: 20190368942
    Abstract: An imaging device may include an RF source configured to irradiate an object with RF radiation, and an array of RE antenna elements. Each RF antenna element may include a loop bolometer configured to receive the RF radiation after interaction with the object. The imaging device may include a processor configured to generate an image based upon respective outputs from the array of RF antenna elements, and a display coupled to the processor and configured to display the image of the object.
    Type: Application
    Filed: May 29, 2019
    Publication date: December 5, 2019
    Inventors: ARAVINDA KAR, Jeffrey Jennings, Rajan Vaidyanathan
  • Publication number: 20190284699
    Abstract: A system for forming surface modified substrates includes a laser system, and a laser processing chamber. A laser scanner automatically controls a position of the laser beam or an x-y translating stage upon which the laser processing chamber is mounted thereon for scanning the laser beam relative to a substrate of material (M) having a bulk portion and an outer surface integrated with the bulk portion, and a coating including metal organic molecules including at least one metal X or particles of metal X on the outer surface. At laser-heated spots atoms of X from the metal coating diffuse into the outer surface to form a modified surface layer including both M and X. The modified surface layer has a thickness of 1 nm, and a 25° C. electrical conductivity ?2.5% above or ?2.5% below a 25° C. electrical conductivity in the bulk portion.
    Type: Application
    Filed: June 4, 2019
    Publication date: September 19, 2019
    Applicant: University of Central Florida Research Foundation, Inc.
    Inventors: Rajan Vaidyanathan, Aravinda Kar
  • Patent number: 10358723
    Abstract: A method of forming surface modified substrates includes providing a substrate of material (M) having a bulk portion and an outer surface integrated with the bulk portion. A coating is deposited including metal organic molecules including at least one metal X or particles of metal X onto the outer surface. The coating is laser irradiated with a laser beam, where atoms of metal X diffuse into the outer surface to form a modified surface layer including both M and atoms of metal X on the bulk portion. The modified surface layer has a thickness of at least 1 nm, and a 25° C. electrical conductivity that is at least 2.5% above or 2.5% below a 25° C. electrical conductivity in the bulk portion.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: July 23, 2019
    Assignee: University of Central Florida Research Foundation, Inc.
    Inventors: Rajan Vaidyanathan, Aravinda Kar
  • Publication number: 20190061000
    Abstract: A laser-assisted microfluidics manufacturing process has been developed for the fabrication of additively manufactured structures. Roll-to-roll manufacturing is enhanced by the use of a laser-assisted electrospray printhead positioned above the flexible substrate. The laser electrospray printhead sprays microdroplets containing nanoparticles onto the substrate to form both thin-film and structural layers. As the substrate moves, the nanoparticles are sintered using a laser beam directed by the laser electrospray printhead onto the substrate.
    Type: Application
    Filed: August 23, 2018
    Publication date: February 28, 2019
    Inventors: Aravinda Kar, Ranganathan Kumar, Eduardo Castillo Orozco
  • Publication number: 20170285351
    Abstract: A method includes generating a laser beam and applying the beam to a substrate to form a via in the substrate. The laser beam has an intensity profile taken at a cross-section transverse to the direction of propagation of the beam. The intensity profile has a first substantially uniform level across an interior region of the cross-section and a second substantially uniform level across an exterior region of the cross-section. The second intensity level is greater than the first intensity level.
    Type: Application
    Filed: November 11, 2015
    Publication date: October 5, 2017
    Inventors: Islam A. Salama, Nathaniel R. Quick, Aravinda Kar
  • Publication number: 20170131556
    Abstract: A method includes generating a laser beam and applying the beam to a substrate to form a via in the substrate. The laser beam has an intensity profile taken at a cross-section transverse to the direction of propagation of the beam. The intensity profile has a first substantially uniform level across an interior region of the cross-section and a second substantially uniform level across an exterior region of the cross-section. The second intensity level is greater than the first intensity level.
    Type: Application
    Filed: November 11, 2015
    Publication date: May 11, 2017
    Inventors: Islam A. Salama, Nathaniel R. Quick, Aravinda Kar
  • Patent number: 9601902
    Abstract: A method of optical signal amplification. Incident photons are received at a photodetector including a doped semiconductor biased by a power source. The photons generate a change in a reflective property, refractive index, or electrical conductivity of the doped semiconductor. For the change in reflective property or refractive index, a first optical signal is reflected off the photodetector to provide a reflected beam, or the photodetector includes a reverse biased semiconductor junction including the doped semiconductor within a laser resonator including a laser medium, wherein a second optical signal is emitted. For the change in electrical conductivity the photodetector includes a reversed biased semiconductor junction that is within an electrical circuit along with an electrically driven light emitting device, where a drive current provided to the light emitting device increases as the electrical conductivity of the photodetector decreases, and the light emitting device emits a third optical signal.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: March 21, 2017
    Assignees: University of Central Florida Research Foundation, Inc., United States of America
    Inventors: Aravinda Kar, Tariq Manzur
  • Patent number: 9570487
    Abstract: An optical output photodetector includes a substrate having a semiconductor surface and at least one optical photodetector element on the semiconductor surface. The optical photodetector element includes a plurality of integrated sensing regions which collectively provide a plurality of different absorbance spectra. The plurality of sensing regions includes a plurality of different semiconductor materials or a semiconductor material having a plurality of different dopants. The optical photodetector element can be configured as an array of optical photodetector elements and the dopants can be magnetic dopants.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: February 14, 2017
    Assignees: The United States of America, Naval Undersea Warfare Center, University of Central Florida Research Foundation, Inc.
    Inventors: Tariq Manzur, Aravinda Kar
  • Patent number: 9211609
    Abstract: A method includes generating a laser beam and applying the beam to a substrate to form a via in the substrate. The laser beam has an intensity profile taken at a cross-section transverse to the direction of propagation of the beam. The intensity profile has a first substantially uniform level across an interior region of the cross-section and a second substantially uniform level across an exterior region of the cross-section. The second intensity level is greater than the first intensity level.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: December 15, 2015
    Assignee: Intel Corporation
    Inventors: Islam A. Salama, Nathaniel R. Quick, Aravinda Kar
  • Publication number: 20150338718
    Abstract: An acousto-optic deflector with multiple acoustic transducers is described that is suitable for use in substrate processing. In one example a method includes transmitting an optic beam through an acousto-optic deflector, applying an acoustic signal with a phase delay across multiple transducers of the acousto-optic deflector to deflect the beam along a first axis by the acousto-optic deflector, and directing the deflected beam onto a workpiece.
    Type: Application
    Filed: April 17, 2015
    Publication date: November 26, 2015
    Inventors: Chong ZHANG, Aleksandar Aleksov, Islam A. Salama, Tiansi Wang, Aravinda Kar
  • Patent number: 9064798
    Abstract: An optical device and method is disclosed for forming the optical device within the wide-bandgap semiconductor substrate. The optical device is formed by directing a thermal energy beam onto a selected portion of the wide-bandgap semiconductor substrate for changing an optical property of the selected portion to form the optical device in the wide-bandgap semiconductor substrate. The thermal energy beam defines the optical and physical properties of the optical device. The optical device may take the form of an electro-optical device with the addition of electrodes located on the wide-bandgap semiconductor substrate in proximity to the optical device for changing the optical property of the optical device upon a change of a voltage applied to the optional electrodes. The invention is also incorporated into a method of using the optical device for remotely sensing temperature, pressure and/or chemical composition.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: June 23, 2015
    Assignee: University of Central Florida
    Inventors: Nathaniel R. Quick, Aravinda Kar, Islam A. Salama
  • Publication number: 20150098481
    Abstract: A method of optical signal amplification. Incident photons are received at a photodetector including a doped semiconductor biased by a power source. The photons generate a change in a reflective property, refractive index, or electrical conductivity of the doped semiconductor. For the change in reflective property or refractive index, a first optical signal is reflected off the photodetector to provide a reflected beam, or the photodetector includes a reverse biased semiconductor junction including the doped semiconductor within a laser resonator including a laser medium, wherein a second optical signal is emitted. For the change in electrical conductivity the photodetector includes a reversed biased semiconductor junction that is within an electrical circuit along with an electrically driven light emitting device, where a drive current provided to the light emitting device increases as the electrical conductivity of the photodetector decreases, and the light emitting device emits a third optical signal.
    Type: Application
    Filed: June 17, 2014
    Publication date: April 9, 2015
    Inventors: ARAVINDA KAR, TARIQ MANZUR
  • Patent number: 8912549
    Abstract: An optical device and method is disclosed for forming the optical device within the wide-bandgap semiconductor substrate. The optical device is formed by directing a thermal energy beam onto a selected portion of the wide-bandgap semiconductor substrate for changing an optical property of the selected portion to form the optical device in the wide-bandgap semiconductor substrate. The thermal energy beam defines the optical and physical properties of the optical device. The optical device may take the form of an electro-optical device with the addition of electrodes located on the wide-bandgap semiconductor substrate in proximity to the optical device for changing the optical property of the optical device upon a change of a voltage applied to the optional electrodes. The invention is also incorporated into a method of using the optical device for remotely sensing temperature, pressure and/or chemical composition.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: December 16, 2014
    Assignee: University of Central Florida
    Inventors: Nathaniel R. Quick, Aravinda Kar, Islam A. Salama