Patents by Inventor Herbert Pfieffer

Herbert Pfieffer 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).

  • B-spline optimization of optical glasses especially spectacle glasses with planes of symmetry
    Publication number: 20040114100
    Abstract: A method for optimizing an atoroidal surface of an optical lens, in particular a spectacle lens, having at least one plane of symmetry is characterized by a combination of the following features: dividing the atoroidal surface having at least one plane of symmetry into at least two regions separated by the at least one plane of symmetry; representing one of the separate regions (represented region) of this surface by a set of coefficients of B spline functions; computing sagittal heights of the represented region by B spline interpolation; computing sagittal heights in at least one other region by mirroring coefficients or coordinates at the at least one plane of symmetry; and optimizing the atoroidal surface only by varying the set of B spline coefficients of the represented region.
    Type: Application
    Filed: January 13, 2004
    Publication date: June 17, 2004
    Inventors: Andrea Welk, Helmut Altheimer, Peter Baumbach, Rainer Dorsch, Gregor Esser, Walter Haimerl, Herbert Pfieffer