Patents by Inventor Alexander Y. Polishchuk

Alexander Y. Polishchuk 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).

  • Patent number: 5625458
    Abstract: A method for imaging objects in turbid media. According to one embodiment of the invention, the method comprises the steps of (a) illuminating the object through the turbid medium with a pulse of light, the light emergent from the turbid medium consisting of a ballistic component, a snake-like component and a diffusive component, the diffusive component including Fermat photons and non-Fermat photons; (b) gating the light emergent from the turbid medium to preferentially select Fermat photons; and (c) forming an image of the object using the gated light. Preferably, a spatial gate is used to preferentially select Fermat photons from the emergent light. This may be done by orienting the source of the illuminating light and a light detector to lie along a most favorable path travelled predominately by Fermat photons. A time gate, such as a streak camera or the like, may be used in addition to the spatial gate to more carefully select Fermat photons from the emergent light.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: April 29, 1997
    Assignee: Research Foundation of City College of New York
    Inventors: Robert R. Alfano, Alexander Y. Polishchuk