The practice indicates that pinhole filter is adjusted very difficultly and because of air ionization and burning in base material as focus of big energy laserbeam, quality of laser beam is influenced.
目前通用的针孔滤波器存在调整困难及对大功率激光器因聚焦原因易产生空气电离与烧蚀基底等弊病，影响光束质量。
Application technique of spatial pinhole filter for laser beam;
空间针孔滤波器的使用技巧
Application of Programmable Controllers in Pinhole Test of Condom;
可编程控制器在避孕套针孔检测中的应用
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