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Opt Express. 2009 Mar 2;17(5):3543-54.

Imaging subsurface damage of grinded fused silica optics by confocal fluorescence microscopy.

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  • 1Commissariat à l'énergie atomique, Centre d'études scientifiques et techniques d'Aquitaine, BP 2, 33114 Le Barp, France. jerome.neauport@cea.fr

Abstract

We report an experimental investigation of fluorescence confocal microscopy as a tool to measure subsurface damage on grinded fused silica optics. Confocal fluorescence microscopy was performed with an excitation at the wavelength of 405 nm on fixed abrasive diamond grinded fused silica samples. We detail the measured fluorescence spectrums and compare them to those of oil based coolants and grinding slurries. We evidence that oil based coolant used in diamond grinding induces a fluorescence that marks the subsurface damages and eases its observation. Such residual traces might also be involved in the laser damage process.

PMID:
19259193
[PubMed]
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