光子学报, 2015, 44 (12): 1212001, 网络出版: 2015-12-23
用等效应力法分析温度变化对胶粘反射镜面形的影响
Using the Equivalent Stress to Analyze the Effect of Temperature Change on Surface Accuracy of the Bonded Mirror
光学检测 光学元件 面形分析 胶粘反射镜 温度变化 强迫位移约束 ZYGO干涉仪 Optical detection Optical element Surface analysis Bonded mirror Temperature change Forced displacement restrain ZYGO interferometer
摘要
基于等效应力法分析了温度变化对反射镜面形准确度的影响.对反射镜粘接处施加一定量的径向强迫位移约束, 使其受到与热应力大小一致的应力作用, 在该强迫位移约束下反射镜面形变化与热应力作用下反射镜面形变化基本一致.对直径为70 mm、厚度为15 mm的反射镜进行粘接实验, 用ZYGO干涉仪测定温变前后反射镜的面形变化.当温度由20℃降到16℃时, 反射镜面形峰谷值和均方根值的变化量分别为0.005λ和0.002λ(λ=632.8 nm), 理论计算的峰谷值和均方根值变化量分别为0.004λ和0.002λ;当温度由20℃升高到30℃时, 反射镜面形峰谷值和均方根值变化量分别为0.013λ和0.006λ, 理论计算的峰谷值和均方根值变化量分别为0.012λ和0.004λ, 实验值和模拟分析值基本一致.
Abstract
The equivalent stress method was proposed to analyze the surface change of the mirror under the temperature change. The forced displacement restrain was applied on the bonded position of the mirror to ensure the mirror suffer the equivalent stress compared with the heat stress. The surface change of the mirror under the action of the forced displacement was consistent to the one under the action of the temperature change. A bonded experiment to the mirror whose diameter is 70 mm and thickness is 15 mm and surface accuracy of the mirror is measured by the fine ZYGO interferometer in different temperatures. It is indicated that when the temperature descended from 20℃ to 16℃, the mirror surface change of the Peak to Valley(PV) and Root Mean Square(RMS) are 0.005λ and 0.002λ, while the simulation change of the PV and RMS are 0.004λ and 0.002λ. When the temperature increased from 20℃ to 30℃, the mirror surface change of the PV and RMS are 0.013λ and 0.006λ. The simulation change of the PV and RMS are 0.012λ and 0.004λ. The experimental result agrees with the simulation basically, which illustrate the equivalent stress method based on the forced displacement restrain can express the effect of the temperature change on the surface accuracy change of the mirror perfectly.
李文杰, 王少鑫, 穆全全, 杨程亮, 曹召良, 宣丽. 用等效应力法分析温度变化对胶粘反射镜面形的影响[J]. 光子学报, 2015, 44(12): 1212001. LI Wen-jie, WANG Shao-xin, MU Quan-quan, YANG Chen-liang, CAO Zao-liang, XUAN Li. Using the Equivalent Stress to Analyze the Effect of Temperature Change on Surface Accuracy of the Bonded Mirror[J]. ACTA PHOTONICA SINICA, 2015, 44(12): 1212001.