Patents by Inventor Geoffrey A. Blake

Geoffrey A. Blake 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).

  • Apparatus and method for analyzing microscopic samples based on optical parametric oscillation
    Patent number: 6522402
    Abstract: A tunable spectrometer configured to microsample minute samples of dimension on the order of 10 &mgr;m or less. A tunable optical parametric oscillator laser is used to produce a sampling beam and a reference beam for measuring the absorption of the samples.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: February 18, 2003
    Assignee: California Institute of Technology
    Inventors: Zifu Wang, George R. Rossman, Geoffrey A. Blake
  • Optical parametric oscillator cavity design
    Patent number: 5812305
    Abstract: An optical parametric oscillator which operates with uncoated optics and a non-linear crystal. The pulse length is long relative to the cavity length, and hence the pump is still operating when the crystal flouresces. The fresnel reflection from the uncoated optics is sufficient to maintain the flouresence. Another aspect attenuates one of the idler and signal beams within the cavity, to allow the other one to emerge more dominant.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: September 22, 1998
    Assignee: California Institute of Technology
    Inventors: Geoffrey A. Blake, Sheng Wu, David Rodham