烟幕颗粒对不同激光束的相对消光系数理论和实验

为了比较烟幕颗粒对不同波长激光束的相对消光能力,提出了相对消光系数的概念。在理论研究的基础上,通过设计实验方案,使用透过率比较法计量烟幕颗粒对两种波长激光束相对消光系数。根据相对消光系数和烟幕颗粒对其中一种波长激光的消光系数,得到烟幕颗粒对另一种波长激光的消光系数。与传统计量烟幕颗粒对激光束的消光系数的方法相比,该方法避开了确定烟幕颗粒浓度时所遇到的困难。研究结果表明,上述测量方法是可靠的,是对测量烟幕颗粒消光系数的传统方法、技术的一个补充。

Theoretical and experimental study on relative extinction coefficient of smoke particles to laser beams with different wavelengths

T o compare the ex tinct ion ability of smo ke screen to laser beams w ith dif ferent w aveleng ths, the co ncept of relat ive ex t inct ion coef ficient w as proposed. Based on the design of the ex perimental method, the tr ansmissio n comparison method w as used to measure the relat ive ext inct ion coef f icient . According to the calculated relative ex t inct io n co ef ficient and the ex t inctio n co ef ficient of the smoke to one of the laser beams, the ex tinct ion coeff icient of the smoke to ano ther laser beam co uld be deduced. Compared with the t radit ional measurement methods, the proposed method av oids diff icult ies in def ining the density of smoke, w hich is a supplement to the t rdit ional techniques.