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OPTICAL DIGITAL DATA STORAGE IN ADHESIVE TAPES
Stefan Stadler, Ph.D., tesa AG, Hamburg, Germany
Annouschka Blazejewski, tesa AG, Hamburg, Germany
Jorn Leiber, Ph.D., tesa AG, Hamburg, Germany
Matthias Gerspach, Universitat Mannheim, Germany
Steffen Noehte, Ph.D., European Media Lab, Heidelberg, Germany
Christoph Dietrich, Ph.D., European Media Lab, Heidelberg, Germany
A new technology enables us to record digital optical information (bit-by-bit or as holograms) in
common adhesive tapes with the help of a 50,000 dpi laser lithograph. Among laser irradiation the
adhesive tape changes its optical properties, e.g. its reflectivity and its refractive index. One roll of adhesive tape could hold up to 10 Gbyte of data. For the reading and writing process it is not necessary to unwind the tape. The different layers are adressed by moving the laser focus. The holograms, which
can store the equivalent of 30 written pages in 1 mm2, are extremely forgery-proof and can be easily
individualized. These properties make them ideal candidates for logistics applications and security
systems to prevent counterfeiting.
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