Patents by Inventor Vladmir P. RAKSHA

Vladmir P. RAKSHA 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).

  • Security feature based on a single axis alignment of mirrors in a structured surface that forms a micro mirror array
    Patent number: 10618340
    Abstract: The disclosure relates to an optical security feature that is based on a single axis alignment of mirrors or facets in a structured surface that forms a micro mirror array. In an aspect, a device is described that includes a reflecting structure on a first layer, where the reflecting structure has a top surface with multiple embossed facets arranged in a spatial orientation that produces a flat ring optical effect upon incidence of light. In another aspect, a method for making the device is described that provides a reflecting layer and produces the reflecting structure on the reflecting layer with multiple facets arranged in the spatial orientation to produce the flat ring optical effect. In yet another aspect, an apparatus for making the device is described that includes a pressing device and a stamping device to transfer a pattern of the reflecting structure to a reflecting material.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: April 14, 2020
    Assignee: VIAVI Solutions Inc.
    Inventors: Cornelis Jan Delst, Vladmir P. Raksha, Paul G. Coombs, Robert B. Sargent, Michael Ray Nofi
  • SECURITY FEATURE BASED ON A SINGLE AXIS ALIGNMENT OF MIRRORS IN A STRUCTURED SURFACE THAT FORMS A MICRO MIRROR ARRAY
    Publication number: 20190351693
    Abstract: The disclosure relates to an optical security feature that is based on a single axis alignment of mirrors or facets in a structured surface that forms a micro mirror array. In an aspect, a device is described that includes a reflecting structure on a first layer, where the reflecting structure has a top surface with multiple embossed facets arranged in a spatial orientation that produces a flat ring optical effect upon incidence of light. In another aspect, a method for making the device is described that provides a reflecting layer and produces the reflecting structure on the reflecting layer with multiple facets arranged in the spatial orientation to produce the flat ring optical effect. In yet another aspect, an apparatus for making the device is described that includes a pressing device and a stamping device to transfer a pattern of the reflecting structure to a reflecting material.
    Type: Application
    Filed: May 16, 2018
    Publication date: November 21, 2019
    Inventors: Cornelis Jan DELST, Vladmir P. RAKSHA, Paul G. COOMBS, Robert B. SARGENT, Michael NOFI