Patents by Inventor Keith J Donohue

Keith J Donohue 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).

  • Calcium fluoride optics with improved laser durability
    Patent number: 8986572
    Abstract: The invention is directed to calcium fluoride crystal optics with improved laser durability that can be used for the transmission of below 250 nanometer (nm) electromagnetic radiation. The optics consists of CaF2 as the major component and Mg in an amount in the range of 13 ppm to 20 ppm while Ce and Mn are <0.5 ppm. The doped crystal and optics made therefrom have a ratio of 515/380 nm transmission loss of less than 0.3 after exposure to greater than 2.8 MRads of ?-radiation. Further, the doped crystal and optics made therefrom exhibit a greatly improved lifetime as shown by ALDT testing to at least 1 billion pulses.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: March 24, 2015
    Assignee: Corning Incorporated
    Inventors: James R Cole, Keith J Donohue, Michael Lucien Genier, Robert Stephen Pavlik, Jr., Michael William Price, William Rogers Rosch, Jeffrey L Sunderland
  • CALCIUM FLUORIDE OPTICS WITH IMPROVED LASER DURABILITY
    Publication number: 20120319048
    Abstract: The invention is directed to calcium fluoride crystal optics with improved laser durability that can be used for the transmission of below 250 nanometer (nm) electromagnetic radiation. The optics consists of CaF2 as the major component and Mg in an amount in the range of 13 ppm to 20 ppm while Ce and Mn are <0.5 ppm. The doped crystal and optics made therefrom have a ratio of 515/380 nm transmission loss of less than 0.3 after exposure to greater than 2.8 MRads of ?-radiation. Further, the doped crystal and optics made therefrom exhibit a greatly improved lifetime as shown by ALDT testing to at least 1 billion pulses.
    Type: Application
    Filed: July 18, 2012
    Publication date: December 20, 2012
    Inventors: James R. Cole, Keith J. Donohue, Michael Lucien Genier, Robert Stephen Pavlik, JR., Michael William Price, William Rogers Rosch, Jeffrey L. Sunderland
  • Calcium fluoride optics with improved laser durability
    Patent number: 8252208
    Abstract: The invention is directed to calcium fluoride crystal optics with improved laser durability that can be used for the transmission of below 250 nanometer (nm) electromagnetic radiation. The optics consist of CaF2 as the major component and, in one embodiment, at least one dopant/amount selected >0.3-1200 ppm Mg, >0.3-200 ppm Sr, >0.3-200 ppm Ba, while Ce and Mn are <0.5 ppm. The doped crystal and optics made therefrom have a ratio of 515/380 nm transmission loss of less than 0.3 after exposure to greater than 2.8 MRads of ?-radiation.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: August 28, 2012
    Assignee: Corning Incorporated
    Inventors: James R Cole, Keith J Donohue, Michael Lucien Genier, Robert Stephen Pavlik, Jr., Michael William Price, William Rogers Rosch, Jeffrey L Sunderland
  • CALCIUM FLUORIDE OPTICS WITH IMPROVED LASER DURABILITY
    Publication number: 20100108958
    Abstract: The invention is directed to calcium fluoride crystal optics with improved laser durability that can be used for the transmission of below 250 nanometer (nm) electromagnetic radiation. The optics consist of CaF2 as the major component and, in one embodiment, at least one dopant/amount selected >0.3-1200 ppm Mg, >0.3-200 ppm Sr, >0.3-200 ppm Ba, while Ce and Mn are <0.5 ppm. The doped crystal and optics made therefrom have a ratio of 515/380 nm transmission loss of less than 0.3 after exposure to greater than 2.8 MRads of ?-radiation.
    Type: Application
    Filed: October 21, 2009
    Publication date: May 6, 2010
    Inventors: James R. Cole, Keith J. Donohue, Michael Lucien Genier, Robert Stephen Pavlik, JR., Michael William Price, William Rogers Rosch, Jeffrey L. Sunderland