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《Optoelectronics Letters》 2019年04期
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Final optics damage online inspection in high power laser facility

魏富鹏  陈凤东  唐军  彭志涛  刘国栋  
【摘要】:For the laser-induced damage(LID) in large-aperture final optics, we present a novel approach of damage online inspection and its experimental system, which solves two problems: classification of true and false LID and size measurement of the LID. We first analyze the imaging principle of the experimental system for the true and false damage sites, then use kernel-based extreme learning machine(K-ELM) to distinguish them, and finally propose hierarchical kernel extreme learning machine(HK-ELM) to predict the damage size. The experimental results show that the classification accuracy is higher than 95%, the mean relative error of the predicted LID size is within 10%. So the proposed method meets the technical requirements for the damage online inspection.

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