Patents by Inventor Daniel KIEFHABER

Daniel KIEFHABER 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).

  • Method and apparatus for optically inspecting a mold for manufacturing ophthalmic lenses for possible mold defects
    Patent number: 10867379
    Abstract: A method for optically inspecting a mold (10) for manufacturing ophthalmic lenses such as contact lenses for possible mold defects, including: generating a set of images of the mold (10) for different azimuthal illumination angles (?1, ?9) using an illumination system (20) and an imaging system (30), the latter being aligned such that its focal plane cuts through the mold (10) at a specific axial position along a center axis of the mold (10); generating a focal plane image by averaging pixelwise over the set of images after having masked out in each image those regions that include direct specular reflections from the mold (10); repeating the previous steps for one or a plurality of different axial positions of the focal plane such as to generate a plurality of different focal plane images; identifying one or more image features in the plurality of focal plane images indicative for a possible mold defect; determining for each identified image feature in which focal plane image the identified image feature app
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: December 15, 2020
    Assignee: Alcon Inc.
    Inventors: Fabian Etzold, Arno Florian Warken, Daniel Kiefhaber, Giovanni Campanelli
  • METHOD AND APPARATUS FOR OPTICALLY INSPECTING A MOLD FOR MANUFACTURING OPHTHALMIC LENSES FOR POSSIBLE MOLD DEFECTS
    Publication number: 20200051233
    Abstract: A method for optically inspecting a mold (10) for manufacturing ophthalmic lenses such as contact lenses for possible mold defects, including: generating a set of images of the mold (10) for different azimuthal illumination angles (?1, ?9) using an illumination system (20) and an imaging system (30), the latter being aligned such that its focal plane cuts through the mold (10) at a specific axial position along a center axis of the mold (10); generating a focal plane image by averaging pixelwise over the set of images after having masked out in each image those regions that include direct specular reflections from the mold (10); repeating the previous steps for one or a plurality of different axial positions of the focal plane such as to generate a plurality of different focal plane images; identifying one or more image features in the plurality of focal plane images indicative for a possible mold defect; determining for each identified image feature in which focal plane image the identified image feature app
    Type: Application
    Filed: August 12, 2019
    Publication date: February 13, 2020
    Inventors: Fabian ETZOLD, Arno Florian WARKEN, Daniel KIEFHABER, Giovanni Campanelli