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    Laser-Induced Damage Detection and Assessment by Enhanced Surface Scattering

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    A photoelectric damage detection and assessment system based on laser-induced changes in surface scattering is reported. The system is similar to one reported by Franck, et. al., with improved operating flexibility. It is integrated with a 1064/532 nm damage test facility used for routine testing of production optics. For some types of coated samples, a plot of scatter change vs. applied fluence can be extrapolated to the threshold fluence for surface pitting, eliminating the need for tedious microscopic assessment of near-threshold test sites. The system permits quantitative assessment of surface quality (by forward scatter) at a test site just prior to exposure by the damaging beam. thus, correlations between surface scatter and damage susceptibility may be investigated directly.


    damage assessment, damage detection, damage evolution, experiment automation, intrinsic scatter, laser-induced damage, laser-induced scatter, surface blemishes, threshold extraction

    Author Information:

    Seitel, SC
    Montana Laser Optics, Inc., Bozeman, Montana

    Babb, MT
    Montana Laser Optics, Inc., Bozeman, Montana

    Committee/Subcommittee: E13.01

    DOI: 10.1520/STP18540S