 Ruggedized high-volume enviromentally-friendly electrophoretic cell |
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| Tape data carrier, method and device for manufacturing the same |
| The given problem is solved by the fact that the information carrier is a film structure which ... |
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| Method and apparatus for capacity-efficient restoration in an optical communication system |
| The present invention overcomes the previously mentioned disadvantages by using a hybrid protection ... |
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| Single wall domain latrix for optical data processing system |
| The optical page composer of the present invention is comprised of a magnetizable layer in which ... |
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| Microstructure-bearing articles of high refractive index |
| ; PREFERRED EMBODIMENTS The optical resinous articles of the present invention are characterized by ... |
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| Line light source including fluorescent colorant |
| The present invention provides a line light source which exhibits improved conspicuity in ... |
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| Waveguide security device |
| OF THE INVENTION Referring to the figures in detail, a preferred embodiment of a waveguide ... |
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| Ink jet recording paper |
| What is claimed is: 1. An ink jet recording paper comprising: a substrate; an anchor coating layer ... |
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| Random phase plate for holography and process for manufacturing same |
| What is claimed is: 1. A process for producing a random phase holographic plate coated with ... |
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| Transfer lamination of vapor deposited foils, method and product |
| OF THE INVENTION As illustrated in FIG. 1, the product of this invention is a laminate 10 ... |
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Double hologram
| Details |
Inventors: Noehte, Steffen; Gerspach, Matthias; Dietrich, Christoph; Borgsmuller, Stefan; Blazejewski, Anna; Stadler, Stefan; Leiber, Jo;
Assignee: Tesa Scribos GmbH (Heidelberg, DE)
Primary Examiner: Assaf; Fayez G.
Assistant Examiner:
Attorney, Agent or Firm: Baker & Daniels
The invention relates to a method of providing an article with identifying information, in which a hologram is provided from which at least first and second hologram patterns separated physically from each other can be reproduced. In this case, provision is made for the hologram to be produced in such a way that the first and second hologram patterns can generally be reproduced in one and the same direction but in different planes. |
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DETAILED DESCRIPTION The invention claimed is: 1.
A method of providing an article with one polymer area bearing a hologram as identifying information comprising: calculating one computer generated hologram such that at least two sharp patterns can be reproduced therefrom at different distances but into a same direction; and writing the computer generated hologram in the polymer area using one single light beam writing device.
2.
The method of claim 1, wherein the polymer area comprises two mutually separated regions interleaved with each other.
3.
The method of claim 2, wherein first interleaved regions are impressed while other regions are written using the single light beam writing device.
4.
The method of claim 3, wherein the computer generated hologram is calculated such that the two sharp patterns lie so far apart from each other that the patterns can be read simultaneously with different reading means.
5.
The method of claim 4, wherein said calculating step comprises iteratively determining an interference pattern from which the two, different sharp patterns can be reproduced.
6.
The method of claim 3, wherein said calculating step comprises iteratively determining an interference pattern from which the two, different sharp patterns can be reproduced.
7.
The method of claim 2, wherein the computer generated hologram is calculated such that the two sharp patterns lie so far apart from each other that the patterns can be read simultaneously with different reading means.
8.
The method of claim 7, wherein said calculating step comprises iteratively determining an interference pattern from which the two, different sharp patterns can be reproduced.
9.
The method of claim 2, wherein said calculating step comprises iteratively determining an interference pattern from which the two, different sharp patterns can be reproduced.
10.
The method of claim 1, wherein the two sharp patterns comprise a first hologram pattern and a second hologram pattern, and wherein the polymer area comprises one single region bearing one interference pattern written by the single light beam writing device for both the first and the second hologram patterns combined
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Optical Systems 
