激光冲击波清洗K9玻璃表面SiO2颗粒的研究

光学元件表面的颗粒污染物会影响到光学系统的正常运行,为了解决此污染问题,采用激光等离子体冲击波清洗法移除K9玻璃表面的SiO2颗粒污染物。在激光器扫描模式下,实验研究此方法的清洗效果;在激光单点作用下,理论计算了颗粒位置、激光作用距离及激光能量对清洗效果的影响,并以实验加以验证。结果表明,通过良好地控制激光参量,采用Nd:YAG激光清洗K9玻璃表面的SiO2颗粒具有明显的效果;在激光单点作用下,计算结果与实验结果规律一致。

Clearance of SiO2 particles on K9 glass surfaces by means of laser shockwave

Particle contaminations on the optical surfaces limit the operation of optical systems.In order to solve the pollution problem,laser plasma shockwave was utilized to remove the SiO2 particles on the surface of K9 glass.The laser cleaning effect was studied in the scanning mode.In case of single pulse laser cleaning,the effect of several parameters,such as particle position,separation distance and laser energy,on the cleaning result was simulated and demonstrated in experiments.The results show that Nd:YAG laser can remove the SiO2 particles effectively if properly controlling the laser parameters.The simulation results are consistent with the experimental ones in case of single pulse laser cleaning.