Patents by Inventor Alex Birman

Alex Birman 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).

  • Design of a variable attenuator and fabrication of its shutter element
    Patent number: 6480662
    Abstract: A variable attenuator employs a shutter element that is inserted into the path of a beam of radiation. The shutter element comprises a transparent substrate with an opaque layer formed on top of the substrate. The opaque layer forms a pattern in the shape of dots on one part of the substrate and in the shape of a solid layer with holes therein on another part of the substrate. The pattern of holes and dots are such that the radiation transmission function of the element varies as a smooth linear function with the length of the shutter element. Therefore, by inserting the shutter element in a direction along its length into the path of the radiation beam, the amount of attenuation of the beam can be accurately controlled.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: November 12, 2002
    Assignee: Dicon Fiberoptics, Inc.
    Inventors: Stephen Chai, Alex Birman, Nathan Shou, Peter Jones, Ho-Shang Lee