基于有限元法光学材料热损伤的研究

Thermal Damage to Optical Material Based on Finite Element Method

研究光学元件激光破坏的物理规律对改进激光系统及扩展其在科研生产中的应用具有重要意义。在考虑材料热力学参数随温度变化规律的前提下,以热传导方程和热弹方程为基础,采用有限元法,以K9玻璃为例计算了空间高斯分布连续CO2激光辐照光学材料引起的温度和热应力分布及其熔融和热应力损伤阈值。

Under the prerequisite of considering the influence of temperature distributions to the thermodynamic parameters of the material,based on the thermal conduction equations and the thermal-elastic equations,the transient distributions of temperature and thermal stress in the optical material K9 is calculated by a finite element analysis method.Temperature and thermal-stress distribution,fusion and heat stress damage threshold figure of space Gaussian distribution when the CO2 laser irradiation optical material are known clearly.The research on damage threshold of optical material by laser is very important to scientific research and production.