红外太阳望远镜封窗玻璃的变形分析

Deformation Analysis for Hermetic Window Glass of IR Solar Telescope

真空望远镜封窗玻璃主要受到大气压力和重力的影响,由于要求得到高空间分辨力的太阳像,所以对封窗玻璃的变形要求很高。用有限元法对封窗玻璃进行力学分析计算,得出不同角度观测时的应力及变形数据,封窗玻璃在各个位置观测时受到的应力和变形相差很小,可近似认为变形后的表面是对称旋转变形。

In IR solar telescope, atmosphere pressure and gravitation are the main factors affecting the hermetic window glass. In order to obtain a solar image with high spatial resolution, a high demand for the deformation of hermetic window glass is required. The stress and deformation data under the different observation angles were obtained by mechanical analysis and calculation with the finite element method. The difference of the stress and deformation of hermetic window glass on various observation position is very small, thus the deformed surface can be approximately considered to have symmetrical rotary deformation.