Diffractive marking (glass)
Excimer lasers offer unique advantages for the processing of glass. Their short wavelengths in the ultraviolet spectral region are strongly absorbed by most glasses and offer an even higher spatial resolution than visible wavelengths. For most glass types, the use of the ArF excimer laser (wavelength 193 nm) leads to the best results. For the diffractive marking of industrial glasses, a micrometer fine surface relief grating is machined into the glass surface filling the interior of a given macroscopic contour. Similar to holographic safety features on bank notes, processed areas appear in all spectral color upon directed illumination from the side. The laser marking works without weakening the glass matrix and the markings are reliably recognized by machine vision. A wide variety of markings in the forms of logos, texts, or codes can be realized, on plane or curved surfaces.
J. Meinertz, T. Fricke-Begemann, J. Ihlemann:
Micron and sub-micron gratings on glass by UV laser ablation
Physics Procedia 41, 701 (2013)
J. Bekesi, J. Meinertz, P. Simon, J. Ihlemann:
Sub-500-nm patterning of glass by nanosecond KrF-excimer laser ablation
Applied Physics A 110, 17 (2013)
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Laser-Laboratorium Göttingen e.V. (LLG)
Head of the Department
Dr. Peter Simon
"Short Pulses / Nanostructures"
Contact person for
Nano Structure Technology:
Dr. Jürgen Ihlemann