Reversible laser marking process in anthraquinone dye films
| Autor: | A. H. Sporer |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
business.industry Materials Science (miscellaneous) Optical storage Photothermal therapy Laser Anthraquinone Industrial and Manufacturing Engineering Pulse (physics) law.invention Light intensity chemistry.chemical_compound Optics chemistry law X-ray crystallography Business and International Management business Layer (electronics) |
| Zdroj: | Applied optics. 26(7) |
| ISSN: | 1559-128X |
| Popis: | A reversible laser marking material is described which is based on a photothermal transformation between a crystalline and amorphous phase of an anthraquinine dye film. It is shown that the material is stable in ambient conditions in either the crystalline or amorphous phase. The transformation from the crystalline to the amorphous phase can be accomplished with a 6.5-mW 50-ns pulse of a 1-microm spot from the 647-nM line of a Kr laser. The reversal occurs with a 0.93-mW pulse applied for 1 ms. The long erasure pulse time is attributed to the long orientation time for clusters of rodlike dye molecules at the recrystallization temperature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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