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Image for: Invisible tags: Physicists at TU Dresden write, read and erase using light


A luminescent tag, contactless printed onto a plastic foil. The light emitting layer is thinner than a human hair. The imprint can be erased and replaced by another pattern.
A luminescent tag, contactless printed onto a plastic foil. The light emitting layer is thinner than a human hair. The imprint can be erased and replaced by another pattern.

M. Gmelch and H. Thomas, TU Dresden

(389 KB, 1608 x 1001 pixels)

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