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为了保证透镜的面形精度受温度影响较小,透镜采用低应力胶粘结要优于采用机械方式装夹。首先对比了胶粘结透镜在16℃,20℃,26℃时透镜轴向应力大小和面形的变化。实验验证了在不同温度下,胶粘结透镜面形的峰谷(PV)值(0.073λ,0.064λ,0.085λ)要优于机械方式装夹的透镜面形PV值(0.204λ,0.108λ,0.105λ)。最后对不同温度下胶粘结透镜面形变化的理论计算、仿真和实验结果的误差进行了分析。实验结果表明在温度变化时,采用胶粘结透镜的面形精度要优于机械装夹的透镜面形精度,并且能有效控制温度变化对透镜面形精度的影响。
In order to ensure the accuracy of the lens surface temperature is less affected by the lens using low-stress adhesive bonding is better than using mechanical clamping. Firstly, the change of axial stress and surface shape of the lens at 16 ℃, 20 ℃ and 26 ℃ are compared. The experimental results show that the peak-to-valley (PV) values (0.073λ, 0.064λ, 0.085λ) of the adhesive lens are better than those of the mechanically mounted lens (0.204λ, 0.108λ , 0.105λ). Finally, the theoretical calculation, simulation and experimental results of the adhesive bonded lens at different temperatures were analyzed. The experimental results show that the surface accuracy of the bonded lens is better than that of the mechanically clamped lens when the temperature changes, and the influence of the temperature variation on the surface accuracy of the lens can be effectively controlled.