| Autor: |
Hirschausen, D., Kane, D. M. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 10/15/2002, Vol. 92 Issue 8, p4201, 8p, 2 Black and White Photographs, 3 Diagrams, 1 Chart, 7 Graphs |
| Abstrakt: |
Waxes and thermopolymers are commonly used to mount optical and photonic materials prior to polishing and singularization. After demounting, residual wax/thermopolymer can adhere to the component surface, frequently in the form of particles. Dry, ultraviolet-pulsed laser cleaning has been demonstrated to effectively remove paraffin wax particles, prepared on a glass surface using a wax aerosol technique. This method produces dome-shaped particles. Experimental evidence suggests the dome-shaped particles are vaporized by the absorption of the energy from the laser pulse. A theoretical model based on vaporization has been developed and this leads to predictions of the critical fluence for single laser pulse removal of dome-shaped particles which is in good agreement with that experimentally measured (220 mJ/cm[SUP2]). The model also gives insight into the geometries and relative thermal properties of the "particles" and surface, which are important in determining whether removal by vaporization is a viable process. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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