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根据红外望远镜的工作状态,望远镜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率的太阳像,所以对窗玻璃的变形要求很高。用有限元法对处于工作状态下的窗玻璃进行计算,得到不同厚度和不同工作角度窗玻璃的变形数据,然后对变形数据进行比较分析。可看出对应于相同的口径,不同厚度的窗玻璃,在此工作状态下的变形有较大的不同,但在对于厚度不变而只改变观测角度即受力状态的情况下,重力对窗玻璃的影响相对是较小的,通过分析比较得到了比较适合此系统的窗玻璃的口径和厚度。
According to the working conditions of the infrared telescope, the telescope window glass is mainly affected by the atmospheric pressure and the gravity, and the deformation of the window glass is very demanding due to the requirement of obtaining the solar image with high spatial resolution. The finite element method is used to calculate the windowpanes in the working state, and the deformation data of the windowpanes with different thicknesses and working angles are obtained. Then, the deformation data are compared and analyzed. Can be seen that corresponds to the same caliber, different thickness of the glass, the deformation in this working state are quite different, but for the same thickness, but only change the observation point that the force state, the gravity of the window The impact of glass is relatively small, through analysis and comparison have been more suitable for the system of window diameter and thickness.