Patents by Inventor Timothy Vlaar

Timothy Vlaar 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).

  • Fingerprint image optical input apparatus
    Patent number: 6355937
    Abstract: A fingerprint optical input apparatus comprises a contact image sensor for viewing a moving finger and providing a high contrast image. A narrow strip of the fingerprint touching a transparent platen is illuminated by sheet of collimated light normal to or at an oblique angle to the surface. The fingerprint image is viewed at an oblique angle by partially scattered light or by frustrated total internal reflection by a GRIN rod lens array and projected onto a linear array sensor. Various embodiments of the platen provide a compact design by using TIR or mirror reflections of the fingerprint image.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: March 12, 2002
    Assignee: Kinetic Sciences Inc.
    Inventors: Keith Antonelli, Geoffrey Vanderkooy, Timothy Vlaar, Guy Immega
  • Fingerprint image optical input apparatus
    Publication number: 20010050765
    Abstract: A fingerprint optical input apparatus comprises a contact image sensor for viewing a moving finger and providing a high contrast image. A narrow strip of the fingerprint touching a transparent platen is illuminated by sheet of collimated light normal to or at an oblique angle to the surface. The fingerprint image is viewed at an oblique angle by partially scattered light or by frustrated total internal reflection by a GRIN rod lens array and projected onto a linear array sensor. Various embodiments of the platen provide a compact design by using TIR or mirror reflections of the fingerprint image.
    Type: Application
    Filed: April 9, 2001
    Publication date: December 13, 2001
    Inventors: Keith Antonelli, Geoffrey Vanderkooy, Timothy Vlaar, Guy Immega
  • Fingerprint image optical input apparatus
    Patent number: 6259108
    Abstract: A fingerprint optical input apparatus comprises a contact image sensor for viewing a moving finger and providing a high contrast image. A narrow strip of the fingerprint touching a transparent platen is illuminated by sheet of collimated light at an oblique angle to the surface. The fingerprint image is viewed by frustrated total internal reflection by a GRIN rod lens array and projected onto a linear array sensor. Various embodiments of the platen provide a compact design by using TIR or mirror reflections of the fingerprint image.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: July 10, 2001
    Assignee: Kinetic Sciences Inc.
    Inventors: Keith Antonelli, Geoffrey Vanderkooy, Timothy Vlaar, Guy Immega