STP1028: Laser-Induced Damage Detection and Assessment by Enhanced Surface Scattering

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

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

    Pages: 6    Published: Jan 1988


    Abstract

    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.

    Keywords:

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


    Paper ID: STP18540S

    Committee/Subcommittee: E13.01

    DOI: 10.1520/STP18540S


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