针对在温度范围大的环境中使用的多组元透镜组由于透镜和镜座的材料热膨胀系数不匹配而在透镜内部产生应力,影响系统光学性能的问题,对透镜组的固定支撑结构进行设计以最小化此应力.对常用的几种表面接触方式进行分析比较,计算温度对轴向和径向的影响,并合理设计透镜组安装和定位结构,采用MSC.Patran 软件对消热结构进行验证.结果表明,消热间隙和消热垫的设计使温度对透镜的影响明显减小,而且整体结构刚度高,便于装调,对于共轴光学系统的支撑结构是一种普遍适用的设计方法.

As the mismatch of thermal expansion coefficients between the lens and the frames,stress on the lens is brought under the large temperature range,which can affect the properties of optical system.So a special support structure is designed to minimize the stress.Firstly,several existing form of surface contacted are analyzed and compared,then the axial and radial effect caused by temperature is calculated,and the fixing and orientation structure is designed prettily.Lastly,the impact of reducing the thermal stress is simulated by the MSC.Patran software.The result indicates that the space and pad for reducing the thermal stress make the stress and deformation of lens caused by temperature decrease clearly,and the rigidity of the assembly system is fine,assembly method simple,as a broad applicable design method can solve the support structure of coaxial optical system.