一种实验室环境下使用的自准直仪,使用温度为实验室温度(20±5)℃。实验室环境相对稳定,无冲击、振动、污染等因素的影响,但环境温度变化范围较大,为±5 ℃,因此有必要通过温度变化对光机结构的影响来分析机械结构的设计。通过计算确定了间隙量需求,分析了温度变化对系统的影响及产生的径向应力,结果表明在实验室环境下产生的温度变化不会对透镜产生径向挤压。

An autocollimator for the laboratory environment is used at temperature in the laboratory where the environment is relatively stable and there is no effect of impact,vibration and pollution,etc.Considering the wider temperature variation range of ±5 ℃,the effect of temperature on the optical and mechanical structures is studied to analyze the design of the mechanical structure.The gap between lens and base and the generated radial stress are calculated.The results show that the temperature variation in the laboratory environment will not cause radial stress to the lens.