从理论上论述了温度梯度对主镜面形变形的影响,分析了当光轴位置不同、主镜支撑方式不同时,在轴向温度梯度和径向温度梯度作用下的面形变形。通过计算,得出轴向温度梯度对面形变形的影响要远大于径向温度梯度对面形的影响,而且镜面变形不仅与主镜的线胀系数和其他材料、结构特性参数有关,与温度梯度的大小和方向均有密切的关系。 The influence of temperature gradient on the deformation of the primary mirror is theoretically discussed. The deformation of the primary mirror under the action of axial temperature gradient and radial temperature gradient is analyzed when the position of the optical axis is different and the supporting modes of the primary mirror are different. Through calculation, it is concluded that the influence of axial temperature gradient on surface deformation is far greater than that of radial temperature gradient, and the deformation of mirror is not only related to the linear expansion coefficient of the main mirror and other material and structural parameters, but also to the temperature gradient Size and direction are closely related.