激光窗口材料热应力分析研究

利用有限Hankel变换就常见的环形分布激光束情形,推导得到了激光束辐照透过窗口镜引起热传导温度场和热变形分布的理论解,通过分析白宝石、石英两种窗口材料的热变形分布,结果表明,材料的热膨胀系数和热扩散率分别是决定热变形量大小和空间分布的决定性因素.

Study of Thermal Deformations of Laser Windows

By employing limited Hankel transforms,heat conduction and thermal deformation of optical windows induced by annularly-distributed laser beam are studied theoretically.The theoretical result for sapphire and fused silica optical windows are calculated.It is found that the thermal expansion coefficient and thermal diffusion coefficient of materials are of the most important factors in determining the magnitude and distribution characteristics of the window thermal deformation field.