Patents by Inventor Duane E. Preiss

Duane E. Preiss 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).

  • Two imager projection device
    Patent number: 10477194
    Abstract: The present disclosure describes optical elements and optical devices that use the optical elements to allow the output of two imagers to be combined onto a single optical axis. Each of the two imagers can be based on alternate polarization directions, and the disclosed embodiments can enable high contrast 3D projectors without requiring either time or polarization sequencing. The present disclosure further describes projection systems that include the optical devices.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: November 12, 2019
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Joseph C. Carls, Craig R. Schardt, Duane E. Preiss, Dwight E. Baldwin
  • TWO IMAGER PROJECTION DEVICE
    Publication number: 20150136950
    Abstract: The present disclosure describes optical elements and optical devices that use the optical elements to allow the output of two imagers to be combined onto a single optical axis. Each of the two imagers can be based on alternate polarization directions, and the disclosed embodiments can enable high contrast 3D projectors without requiring either time or polarization sequencing. The present disclosure further describes projection systems that include the optical devices.
    Type: Application
    Filed: April 11, 2013
    Publication date: May 21, 2015
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Joseph C. Carls, Craig R. Schardt, Duane E. Preiss, Dwight G. Baldwin
  • TWO IMAGER PROJECTION DEVICE
    Publication number: 20150103151
    Abstract: The present disclosure describes optical elements and optical devices that use the optical elements to allow the output of two imagers to be combined onto a single optical axis. Each of the two imagers can be based on alternate polarization directions, and the disclosed embodiments can enable high contrast 3D projectors without requiring either time or polarization sequencing. The present disclosure further describes projection systems that include the optical devices.
    Type: Application
    Filed: April 16, 2013
    Publication date: April 16, 2015
    Inventors: Joseph C. Carls, Craig R. Schardt, Duane E. Preiss, Dwight E. Baldwin