Patents by Inventor Nilabh Kumar Roy

Nilabh Kumar Roy 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: 11747731
    Abstract: A shaping system and method of shaping with the shaping system. The shaping system may include a spatial light modulator. The shaping system may include a radiation source to illuminate the spatial light modulator with actinic radiation. The shaping system may include a beam splitter configured to receive actinic radiation from the spatial light modulator and emit a first image of the spatial light modulator and a second image of the spatial light modulator. The shaping system may include a beam combiner configured to receive the first image and the second image and emit a combined image. The combined image may include the first image; and the second image offset from the first image. The shaping system may include a projection system configured to receive the combined image and illuminate formable material between a template and a substrate with a projected image at a plane of the formable material.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: September 5, 2023
    Assignee: CANON KABISHIKI KAISHA
    Inventors: James W. Irving, Edward Brian Fletcher, Nilabh Kumar Roy
  • Publication number: 20220163893
    Abstract: A shaping system and method of shaping with the shaping system. The shaping system may include a spatial light modulator. The shaping system may include a radiation source to illuminate the spatial light modulator with actinic radiation. The shaping system may include a beam splitter configured to receive actinic radiation from the spatial light modulator and emit a first image of the spatial light modulator and a second image of the spatial light modulator. The shaping system may include a beam combiner configured to receive the first image and the second image and emit a combined image. The combined image may include the first image; and the second image offset from the first image. The shaping system may include a projection system configured to receive the combined image and illuminate formable material between a template and a substrate with a projected image at a plane of the formable material.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 26, 2022
    Inventors: James W. Irving, Edward Brian Fletcher, Nilabh Kumar Roy
  • Patent number: 10722947
    Abstract: A microscale selective laser sintering (?-SLS) that improves the minimum feature-size resolution of metal additively manufactured parts by up to two orders of magnitude, while still maintaining the throughput of traditional additive manufacturing processes. The microscale selective laser sintering includes, in some embodiments, ultra-fast lasers, a micro-mirror based optical system, nanoscale powders, and a precision spreader mechanism. The micro-SLS system is capable of achieving build rates of at least 1 cm3/hr while achieving a feature-size resolution of approximately 1 ?m. In some embodiments, the exemplified systems and methods facilitate a direct write, microscale selective laser sintering ?-SLS system that is configured to write 3D metal structures having features sizes down to approximately 1 ?m scale on rigid or flexible substrates. The exemplified systems and methods may operate on a variety of material including, for example, polymers, dielectrics, semiconductors, and metals.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: July 28, 2020
    Assignee: Board of Regents, The University of Texas System
    Inventors: Michael A. Cullinan, Nilabh Kumar Roy, Anil Yuksel, Chee Seng Foong
  • Publication number: 20180065186
    Abstract: A microscale selective laser sintering (?-SLS) that improves the minimum feature-size resolution of metal additively manufactured parts by up to two orders of magnitude, while still maintaining the throughput of traditional additive manufacturing processes. The microscale selective laser sintering includes, in some embodiments, ultra-fast lasers, a micro-mirror based optical system, nanoscale powders, and a precision spreader mechanism. The micro-SLS system is capable of achieving build rates of at least 1 cm3/hr while achieving a feature-size resolution of approximately 1 ?m. In some embodiments, the exemplified systems and methods facilitate a direct write, microscale selective laser sintering ?-SLS system that is configured to write 3D metal structures having features sizes down to approximately 1 ?m scale on rigid or flexible substrates. The exemplified systems and methods may operate on a variety of material including, for example, polymers, dielectrics, semiconductors, and metals.
    Type: Application
    Filed: March 31, 2017
    Publication date: March 8, 2018
    Inventors: Michael A. Cullinan, Nilabh Kumar Roy, Anil Yuksel, Chee Seng Foong
  • Publication number: 20170282247
    Abstract: Exemplified microscale selective laser sintering (?-SLS or micro-SLS) systems and methods facilitate modeling of the nanoparticle powder bed by simulating the interactions between particles during the powder spreading operation. In particular, the exemplified methods and system use multiscale modeling techniques to accurately predict the formation and mechanical/electrical properties of parts produced by selective laser sintering of powder beds. Discrete element modeling is used for nanoscale particle interactions by implementing the different forces dominant at nanoscale. A heat transfer analysis is used to predict the sintering of individual particles in the powder beds in order to build up a complete structural model of the parts that are being produced by the SLS process.
    Type: Application
    Filed: March 31, 2017
    Publication date: October 5, 2017
    Inventors: Michael A. Cullinan, Anil Yuksel, Nilabh Kumar Roy