Patents by Inventor Herman M. A. Amendt

Herman M. A. Amendt 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 of manufacturing optical components
    Patent number: 4957663
    Abstract: A method of manufacturing components such as optical components (17, 18, 21, FIG. 2C) by means of a matrix which comprises a preform 12 of glass or quartz and has a skin 14 of a cured epoxy synthetic resin, the surface of which is the negative of a metal mold from which the matrix is produced. The matrix is suitable for use in the above-mentioned method, whereby optical components are produced which have surfaces that are for example, the aspherical negatives of the matrix surface.
    Type: Grant
    Filed: March 2, 1989
    Date of Patent: September 18, 1990
    Assignee: U.S. Philips Corp.
    Inventors: Renso J. M. Zwiers, Johannes M. G. Verhoeven, Herman M. A. Amendt
  • Optical element having an aspheric surface
    Patent number: 4738516
    Abstract: For manufacturing monaspherical lenses, a correction layer of a synthetic resin is provided on a substrate having a spherical surface. In this method, centering is performed by using the curvature of the surface of the matrix. With a correct choice of the radius of curvature of the substrate surface, the substrate approaches the matrix most closely near a collection of inflection points in the matrix surface situated on a circle. A good centering without a guiding mechanism is possible by using the method according to the invention. Moreover, the differences in thickness in the correction layer are small enough to prevent shrinkage defects upon curing of the synthetic resin layer.
    Type: Grant
    Filed: July 10, 1986
    Date of Patent: April 19, 1988
    Assignee: U.S. Philips Corp.
    Inventors: Johannes M. G. Verhoeven, Albert Smid, Herman M. A. Amendt
  • Method of manufacturing an optical element having an aspheric surface
    Patent number: 4623496
    Abstract: For manufacturing monaspherical lenses, a correction layer of a synthetic resin is provided on a substrate having a spherical surface. In this method, centering is performed by using the curvature of the surface of the matrix. With a correct choice of the radius of curvature of the substrate surface, the substrate approaches the matrix most closely near a collection of inflection points in the matrix surface situated on a circle. A good centering without a guiding mechanism is possible by using the method according to the invention. Moreover, the differences in thickness in the correction layer are small enough to prevent shrinkage defects upon curing of the synthetic resin layer.
    Type: Grant
    Filed: December 18, 1984
    Date of Patent: November 18, 1986
    Assignee: U.S. Philips Corporation
    Inventors: Johannes M. G. Verhoeven, Albert Smid, Herman M. A. Amendt
  • Beam-splitting prism, method of manufacturing said prism, and optical read and/or write unit provided with said prism
    Patent number: 4489408
    Abstract: A beam-splitting prism provided with a roof-edge prism is described. The roof-edge prism is made of a cured transparent synthetic material and can be arranged on a surface of the beam-splitting prism in a simple and cheap manner.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: December 18, 1984
    Assignee: U.S. Philips Corporation
    Inventors: Johannes M. G. Verhoeven, Herman M. A. Amendt