The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 03, 2013
Filed:
Nov. 12, 2009
Günther Dausmann, Grasbrunn, DE;
Günther Dausmann, Grasbrunn, DE;
Hologram Industries Research GmbH, Pliening-Ottersberg, DE;
Abstract
A method and an apparatus are described for producing a volume transmission hologram and/or a volume reflection hologram from a film () having a backing foil () and a holographic layer (). In said method, the film () is guided over a drum (), on which the film () is brought in contact with the master hologram (). The master hologram () and the film () are simultaneously moved through an exposure zone (). In the exposure zone (), the film () and the master hologram () are irradiated with a linearly expanding exposure laser beam () in order to reproduce the master hologram () in the photopolymer layer (). Both volume reflection and volume transmission holograms can be produced in the polymer layer () of the film () that is guided over the drum by means of only one drum (). For this purpose, two master holograms () are or can be associated with the drum and are moved in synchrony therewith while lying thereon, the film () being located radially below the first master hologram () and/or radially above the second master hologram ().