Patents by Inventor Jayanta K. Guha

Jayanta K. Guha 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).

  • Very low absorption, low efficiency laser beamsampler
    Patent number: 4281894
    Abstract: A very low absorption beamsampler for diffracting a very small fraction of a laser beam while specularly reflecting substantially all of the main beam with minimal absorption. The beamsampler comprises a plane mirror surface coated with a high-reflectivity multilayer dielectric coating, the topmost dielectric of which is grooved into a grating and coated with a transparent dielectric having a refractive index very similar, but not the same, as the grooved layer to form a weak phase grating for diffracting a weak first order sampling beam.
    Type: Grant
    Filed: January 21, 1980
    Date of Patent: August 4, 1981
    Assignee: The Perkin-Elmer Corporation
    Inventor: Jayanta K. Guha