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PI Physik Instrumente - Revolution In Photonics Align ROSLB 3/24

Doped Glass Enables Tiny Bar Codes

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Kevin Robinson

The ability to label chemicals, biological samples, explosives and currency with invisible ID tags would lead to numerous security and safety applications. Now scientists at Corning Inc. in Corning, N.Y., have built bar codes from microscopic slices of glass doped with rare-earth ions that may be used to mark money, drugs and genes. These false color images of rare-earth-doped glass micro bar codes illustrate the tagging devices. The top image shows "one-dimensional" bar codes that feature six color bands. The bottom image displays "two-dimensional" codes, two six- banded fibers fused...Read full article

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    Published: March 2003
    bar codes from microscopic slices of glass doped with rare-earth ionsBasic SciencechemicalsConsumerdefenseinvisible ID tagsMicroscopyResearch & Technologysecurity and safety applicationsTech Pulse

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