Automated laser damage test system with real-time damage event imaging and detection

被引:9
作者
Wolfe, Justin E. [1 ]
Schrauth, Samuel E. [1 ]
机构
[1] Lawrence Livermore Natl Lab, 7000 East Ave,L 468, Livermore, CA 94550 USA
来源
LASER-INDUCED DAMAGE IN OPTICAL MATERIALS: 2006 | 2007年 / 6403卷
关键词
laser induced damage; image processing; damage testing;
D O I
10.1117/12.696866
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
An automated laser damage test system has been developed by the National Ignition Facility small optics metrology group. The Small Optics Laser Damage (SOLD) system measures the fluence at which laser damage occurs in optical coatings and substrates following the requirements of MEL01-013-OD. Irradiation of the sample is by a 1064nm, 8ns pulse with a 1mm 1/e(2) diameter. The test protocol requires raster scanning of a 1cm(2) area at increasing fluence levels. Real-time high-resolution imaging of the surface during raster scanning enables automated detection and sizing of defects to 10 microns. Improved imaging resolves actual size of damage events while the automated damage detection removes the subjectivity of the human operator in thresholding damage events. In addition, a map is created enabling additional functions such as excluding damage sites on future scans and to returning to the damage site for growth testing.
引用
收藏
页数:9
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