Patents by Inventor Ujwal S. Sathyam

Ujwal S. Sathyam 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).

  • Optical detection dental disease using polarized light
    Patent number: 6522407
    Abstract: A polarization sensitive optical imaging system is used to detect changes in polarization in dental tissues to aid the diagnosis of dental disease such as caries. The degree of depolarization is measured by illuminating the dental tissue with polarized light and measuring the polarization state of the backscattered light. The polarization state of this reflected light is analyzed using optical polarimetric imaging techniques. A hand-held fiber optic dental probe is used in vivo to direct the incident beam to the dental tissue and collect the reflected light. To provide depth-resolved characterization of the dental tissue, the polarization diagnostics may be incorporated into optical coherence domain reflectometry and optical coherence tomography (OCDR/OCT) systems, which enables identification of subsurface depolarization sites associated with demineralization of enamel or bone.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: February 18, 2003
    Assignee: The Regents of the University of California
    Inventors: Matthew J. Everett, Billy W. Colston, Jr., Ujwal S. Sathyam, Luiz B. Da Silva, Daniel Fried
  • Optical detection of dental disease using polarized light
    Publication number: 20020093655
    Abstract: A polarization sensitive optical imaging system is used to detect changes in polarization in dental tissues to aid the diagnosis of dental disease such as caries. The degree of depolarization is measured by illuminating the dental tissue with polarized light and measuring the polarization state of the backscattered light. The polarization state of this reflected light is analyzed using optical polarimetric imaging techniques. A hand-held fiber optic dental probe is used in vivo to direct the incident beam to the dental tissue and collect the reflected light. To provide depth-resolved characterization of the dental tissue, the polarization diagnostics may be incorporated into optical coherence domain reflectometry and optical coherence tomography (OCDR/OCT) systems, which enables identification of subsurface depolarization sites associated with demineralization of enamel or bone.
    Type: Application
    Filed: March 18, 2002
    Publication date: July 18, 2002
    Applicant: The Regents of the University of California
    Inventors: Matthew J. Everett, Billy W. Colston, Ujwal S. Sathyam, Luiz B. Da Silva, Daniel Fried
  • Dental optical coherence domain reflectometry explorer
    Patent number: 6179611
    Abstract: A hand-held, fiber optic based dental device with optical coherence domain reflectometry (OCDR) sensing capabilities provides a profile of optical scattering as a function of depth in the tissue at the point where the tip of the dental explorer touches the tissue. This system provides information on the internal structure of the dental tissue, which is then used to detect caries and periodontal disease. A series of profiles of optical scattering or tissue microstructure are generated by moving the explorer across the tooth or other tissue. The profiles are combined to form a cross-sectional, or optical coherence tomography (OCT), image.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: January 30, 2001
    Assignee: The Regents of the University of California
    Inventors: Matthew J. Everett, Billy W. Colston, Jr., Ujwal S. Sathyam, Luiz B. Da Silva