Using assembled unit of prism and lens, the laser beam from firing channel is focalized and imaged.
采用棱镜透镜组合装置把出射激光束经发射通道聚焦成像，根据光斑半径测量束散角。
2
The shading plate is assembled on the lamp holder and positioned between the illuminating part and the lens, and is used for shading partial light emitted by the illuminating part.