Patents Assigned to Prufbau Dr. Ing. H. Durner GmbH
  • Patent number: 8405893
    Abstract: A device for producing a reflection hologram by means of a master, which is formed by a substrate on which a saw-toothed shaped structure is formed by molding, mechanical or lithographical methods. The structure has a reflective finish, such that the desired surface is produced on the structure. The light of a laser light source is expanded by means of an optical device, thus enabling a beam having a predetermined beam width to be obtained. The beam radiates the master and is reflected by the structure at an angle ? in relation to the incident beam. Above the smooth surface arranged over the structure a photopolymer-film, containing a photo-sensitive layer that is disposed at a distance in relation to the structure, is arranged and the reflection hologram is produced in the photo-sensitive layer.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: March 26, 2013
    Assignee: Prufbau Dr. Ing. H. Durner GmbH
    Inventors: Peter Bauernschmid, Gerhard Hochenbleicher