Patents by Inventor Roger Farrow

Roger Farrow 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: 20180161873
    Abstract: A method of making a three-dimensional object. The method comprises: a) positioning a layer of particles over a build plate; b) exposing the layer of particles to a first laser beam having a first set of beam characteristics, thereby heating the layer sufficiently to fuse at least a portion of the particles together to form a build layer; c) exposing a first region of one of i) the layer of particles or ii) the build layer to a second laser beam having a second set of beam characteristics to provide a first temperature profile for the first region; and d) exposing a second region of one of i) the layer of particles or ii) the build layer to a third laser beam having a third set of beam characteristics to provide a second temperature profile for the second region, the second temperature profile being different than the first temperature profile, wherein both the first region and the second region are in the layer of particles or both the first region and the second region are in the build layer.
    Type: Application
    Filed: January 29, 2018
    Publication date: June 14, 2018
    Applicant: nLIGHT, Inc.
    Inventors: Aaron Brown, Keith Kennedy, David Dawson, Robert Martinsen, Roger Farrow, Dahv A. V. Kliner
  • Publication number: 20180088343
    Abstract: Disclosed herein are methods, apparatus, and systems for providing an optical beam delivery device, comprising a first length of fiber comprising a first RIP formed to enable modification of one or more beam characteristics of an optical beam by a perturbation device and a second length of fiber having a second RIP coupled to the first length of fiber, the second RIP formed to confine at least a portion of the modified beam characteristics of the optical beam within one or more confinement regions.
    Type: Application
    Filed: May 26, 2017
    Publication date: March 29, 2018
    Applicant: nLIGHT, Inc.
    Inventors: Dahv A.V. Kliner, Roger Farrow
  • Publication number: 20180088358
    Abstract: Disclosed herein are methods, apparatus, and systems for providing an optical beam delivery system, comprising an optical fiber including a first length of fiber comprising a first RIP formed to enable, at least in part, modification of one or more beam characteristics of an optical beam by a perturbation assembly arranged to modify the one or more beam characteristics, the perturbation assembly coupled to the first length of fiber or integral with the first length of fiber, or a combination thereof and a second length of fiber coupled to the first length of fiber and having a second RIP formed to preserve at least a portion of the one or more beam characteristics of the optical beam modified by the perturbation assembly within one or more first confinement regions.
    Type: Application
    Filed: May 26, 2017
    Publication date: March 29, 2018
    Applicant: nLIGHT, Inc.
    Inventors: Dahv A.V. Kliner, Roger Farrow
  • Publication number: 20180088357
    Abstract: Disclosed herein are methods, apparatus, and systems for perturbing an optical beam propagating within a first length of fiber to adjust one or more beam characteristics of the optical beam in the first length of fiber or a second length of fiber or a combination thereof, coupling the perturbed optical beam into a second length of fiber and maintaining at least a portion of one or more adjusted beam characteristics within a second length of fiber having.
    Type: Application
    Filed: May 26, 2017
    Publication date: March 29, 2018
    Applicant: nLIGHT, Inc.
    Inventors: Dahv A.V. Kliner, Roger Farrow
  • Publication number: 20070104408
    Abstract: A microfluidic detection device provides reduced dispersion of axial concentration gradients in a flowing sample. The microfluidic detection device includes a cell body and a flow path through the cell body. The flow path has an inlet segment, an outlet segment, and a central segment, which forms a detection cell. The central segment is located between and at an angle with both the inlet segment and the outlet segment. The central segment has a first junction with the inlet segment and a second junction with the outlet segment. The cell body contains two arms that can transmit light to and from the detection cell. At least a portion of a first arm is located in the first junction and at least a portion of a second arm is located in the second junction. The portions of the arms located in the junctions are situated so that fluid entering or exiting the central segment of the flow path flows around the outer surface of one of the portions.
    Type: Application
    Filed: April 19, 2006
    Publication date: May 10, 2007
    Inventors: Douglas Cyr, Roger Farrow, Don Arnold