Patents by Inventor Awadesh K. Rai

Awadesh K. Rai 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).

  • Fiber optic laser-induced breakdown spectroscopy sensor for molten material analysis
    Patent number: 6762835
    Abstract: A fiber optic laser-induced breakdown spectroscopy (LIBS) sensor, including a laser light source, a harmonic separator for directing the laser light, a dichroic mirror for reflecting the laser light, a coupling lens for coupling the laser light at an input of a multimode optical fiber, a connector for coupling the laser light from an output of the multimode optical fiber to an input of a high temperature holder, such as a holder made of stainless steel, and a detector portion for receiving emission signal and analyzing LIBS intensities. In one variation, the multimode optical fiber has silica core and silica cladding. The holder includes optical lenses for collimating and focusing the laser light in a molten alloy to produce a plasma, and for collecting and transmitting an emission signal to the multimode optical fiber.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: July 13, 2004
    Assignee: Mississippi State University
    Inventors: Hansheng Zhang, Awadesh K. Rai, Jagdish P. Singh, Fang-Yu Yueh
  • Fiber optic laser-induced breakdown spectroscopy sensor for molten material analysis
    Publication number: 20030174325
    Abstract: A fiber optic laser-induced breakdown spectroscopy (LIBS) sensor, including a laser light source, a harmonic separator for directing the laser light, a dichroic mirror for reflecting the laser light, a coupling lens for coupling the laser light at an input of a multimode optical fiber, a connector for coupling the laser light from an output of the multimode optical fiber to an input of a high temperature holder, such as a holder made of stainless steel, and a detector portion for receiving emission signal and analyzing LIBS intensities. In one variation, the multimode optical fiber has silica core and silica cladding. The holder includes optical lenses for collimating and focusing the laser light in a molten alloy to produce a plasma, and for collecting and transmitting an emission signal to the multimode optical fiber.
    Type: Application
    Filed: March 18, 2002
    Publication date: September 18, 2003
    Inventors: Hansheng Zhang, Awadesh K. Rai, Jagdish P. Singh, Fang-Yu Yueh