... secondary afterlife 次级消光 secondary focusing 次级聚焦 secondary harmonic generation 次谐波振荡 ...
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由于光的衍射作用,使通过聚焦系统的激光束入射到特定靶面成一光斑(主光斑) ,而在主光斑以外还有次级光斑圈(旁瓣)。
The laser beam passing through the focusing systems gets an facula, which consists of main spot and sidelobe on the focus plane.
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