透射式红外光学系统的光机热集成分析

姬文晨; 张宇; 李茂忠

红外技术, 2015, 37 (8): 691, 网络出版: 2015-11-30

透射式红外光学系统的光机热集成分析

Integrated Optomechanical-Thermal Analysis of Refractive Infrared Optical System

论文大纲

姬文晨 ^1,2,*张宇 ¹李茂忠 ²

作者单位

¹ 昆明理工大学机电工程学院，云南昆明 650500

² 云南北方驰宏光电有限公司，云南昆明 650217

红外光学系统 Zernike 多项式光学性能光机热 infrared optical system Zernike polynomial optical performance optomechanical-thermal

摘要

利用有限元软件ANSYS 建立了透射式红外光学系统的有限元模型，并对其进行热应力分析。以Zernike 多项式为接口工具对变形后光学透镜的面形进行拟合，将得到的Zernike 系数、透镜间隔的改变量和材料的折射率变化量代入光学设计软件ZEMAX 中，分析变形后系统的光学性能。分析结果表明，温度改变使光学透镜的面形发生严重变化，并且使光学系统的像面产生漂移，导致系统的光学性能下降；光机热集成分析方法在红外光学系统中的应用，可以预测热环境对系统的光学性能的影响，为光机系统设计提供参考。

Abstract

The finite element model of the refractive infrared optical system was established by ANSYS, and the thermal stress analysis was accomplished. The Zernike polynomial was used to fit the mirror surface of optical lens as an interface tool, the zernike coefficients, lens interval changes and the variation of material’s refractive index were substituted into the optical design software ZEMAX for analyzing the optical performance of system after deformation. The analysis results show that the mirror surface of optical lens changes seriously for different temperature, and the image plane of optical system driftes, which leads to the optical performance of system decreasing. The integrated optomechanical-thermal analysis method is successfully applied to the infrared optical system, so the influence of thermal environment on the optical performance can be predicted, and the method can provide reference for the design of optomechanical system.

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姬文晨, 张宇, 李茂忠. 透射式红外光学系统的光机热集成分析[J]. 红外技术, 2015, 37(8): 691. JI Wen-chen, ZHANG Yu, LI Mao-zhong. Integrated Optomechanical-Thermal Analysis of Refractive Infrared Optical System[J]. Infrared Technology, 2015, 37(8): 691.

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