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Lasers Target Glass Marking

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Lenny Migliore, Coherent Inc.

As do many materials suppliers, manufacturers of glass products stand to benefit from two-dimensional bar codes inscribed on their products. These marks provide a means to determine a product’s revision level, to deter counterfeiting or to track its location, date and method of manufacture. Unlike many materials, however, glass presents significant challenges to most marking methods, including laser-based approaches. Ablating glass requires sources emitting at either ultraviolet or long-infrared wavelengths where the material readily absorbs. The challenge stems from the brittle nature of...Read full article

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    Published: July 2003
    Consumerdeter counterfeitingFeaturesglass productsindustrialmarking methodMicroscopywo-dimensional bar codes

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