Effect of Superpolishing on Laser Damage Threshold.
Abstract
The results of an experimental study to determine the effect of superpolishing techniques on laser induced surface damage are reported. Reduction of surface roughness in five transparent window materials was accomplished using ion polishing and bowl-feed polishing. Surface damage thresholds for these materials were measured at 1.06 micrometers wavelength and 40.5 nsec pulse width. Comparison of the results was accomplished using the recently determined method of roughness normalization. The ion polished samples had greatly improved thresholds, while surface contamination caused a large threshold reduction in the bowl-feed polished samples. Ion polishing was found to be effective in removing surface contamination. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1977
- Accession Number
- ADA042975
Entities
People
- Richard A. House Ii
Organizations
- Air Force Research Laboratory