Method for identifying articles

Details Method for identifying articles Method for identifying articles

2008-07-29

2008-07-29

Chang, Audrey Y (Department: 2872)

Optical: systems and elements

Holographic system or element

For synthetically generating a hologram

C359S002000, C359S035000

Reexamination Certificate

active

10312466

ABSTRACT:
The invention relates to a method for identifying articles, wherein article identification data are made available and the article is provided with a hologram representing said data so that the article can be identified by way of an intensity profile corresponding to said hologram. To this end, article-identifying individual data are provided, a hologram profile is digitally calculated using said individual data, and an intensity modulation of the hologram-producing beam is determined. The hologram-producing beam transfers the hologram pixels onto a hologram support that is associated with the article to be identified so that the article can be identified by way of the intensity profile reproduced from the associated hologram support.

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Michelin, S. et al., “Fourier-Transform Computer-Generated Hologram: A Variation of the Off-Axis Principle” Journal of Fish Biology, Feb. 1994.
Urguhari, K.S. et al., “Computer-Generated Holograms Fabricated by Direct Write of Position Electron-Beam Resist” Optics Letters, Optical Society of America, Washington, US, Feb. 15, 1993.

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