1) prefocus lamp
定焦灯
2) focus lamp
聚焦灯
3) cocusing of headlamps
头灯聚焦
4) fixed focus
定焦
1.
The factors that effect the measuring accuracy of dual star point fixed focus measuring method for minimun focal length of plane optical element is analyzed.
分析用双星点定焦法测量平面光学元件最小焦距时影响测量精度的因素 ,指出测量中应注意的问题。
5) Zoom Flash
变焦闪光灯
6) focusing quartz light
聚焦石英灯
补充资料:冲击波聚焦效应