基于热光学分析的光学窗口玻璃厚度的优化

以热光学分析为基础,对复杂环境下光学窗口的玻璃厚度进行了优化设计。对光学窗口的强度及其所处的热环境进行了分析和仿真,计算出稳态的温度场,将温度场映射到结构模型中计算了光学窗口在力-热耦合情况下的光学玻璃的变形量,结合光学窗口的折射率梯度分析和玻璃面形变化进行热光学分析,计算出了直径是350 mm的光学窗口在不同的玻璃厚度下光程的均方根(RMS)误差值,确定光学窗口的玻璃厚度为18 mm。结果表明,光学窗口既能满足强度和可靠性要求,又能在有效通光口径内满足光学指标,为窗口的设计提供了依据。

Abstract

Based on the thermal optical analysis,the glass thickness of optical window under the complex environment is optimized. Intensity and the thermal environment of optical window is analyzed. steady-state temperature field is calculated. By mapping the temperature field to structural model,the deformation of optical window under the force-thermal coupling condition is calculated. Combinating refractive index gradient analysis and glass surface change of optical window,thermal optical analysis is carried out. When the glass thickness is different,the optical path in root mean square error(RMS) of optical window with diameter of 350 mm is calculated. Thickness of the optical window is determined as 18 mm. The results show that the optical window can not only meet the strength and reliability requirements,but also meet the optic index in the effective optical aperture. These results provide the guidance for the optical window design.

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黎明, 吴清文, 余飞. 基于热光学分析的光学窗口玻璃厚度的优化[J]. 光学学报, 2010, 30(1): 210. Li Ming, Wu Qingwen, Yu Fei. Optimization of Optical Window Glass Thickness Based on the Thermal Optical Analysis[J]. Acta Optica Sinica, 2010, 30(1): 210.

基于热光学分析的光学窗口玻璃厚度的优化

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