Patent ID: 8810766

Claim:
Method for producing contact copies of reflection volume holograms on a holographic film, the method comprising: guiding the film over a rotating drum with a polygonal cross-section, where at least two planar master surfaces are present on the drum, to each of which one master hologram is attached, and; moving the planar master surfaces through or into an exposure area together with the master hologram, subjecting the film and the master hologram in the exposure area to at least one laser exposure to reproduce the master hologram in the photosensitive layer of the film, attaching the film to the drum with a pressure device; rotating the drum constantly, with at least one polygon surface or master surface at a time with the master hologram attached to it being located in the exposure area, wherein the at least one laser exposure is a coherent parallel radiation over the complete or entire surface which takes place over at least part of: the entire master surface, the surface of the respective master holograms of a master surface, or plural master surfaces at the same time, where the at least one laser exposure follows, section wise, the rotational movement of the drum with a speed equal to a rotational speed of the drum in such a manner that the laser exposure over the entire surface is present for a sufficiently long exposure time to reproduce the master hologram in the photosensitive layer and acts on the master and the film; and resetting the laser exposure into an initial or starting position and performing the same rotational movement and exposure together with the next master surface.