光学学报, 2015, 35 (8): 0812003, 网络出版: 2015-07-23
光电平台变焦镜头光机结构设计及热光学分析 
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Opto-Mechanical Structure Design and Thermal Optical Analysis on Zoom Lenses of Optical-Electronic Platform
光学设计 变焦镜头 热光学分析 Zernike多项式 有限元法 optical design zoom lens thermal optical analysis Zernike polynomial finite element method
摘要
针对光电对抗稳定平台中的变焦镜头进行了光机结构设计及热光学特性分析。根据30~120 mm 变焦要求采用凸轮机构进行结构设计。为确保工作在高低温环境下的光学系统获得高分辨率的目标图像，利用有限元方法分析了高低温环境下整机热变形与轴向温度场下变形位移，采用Zernike 多项式对形变后的镜面进行拟合，带入Zemax 软件分析出调制传递函数(MTF)、峰谷值(PV)、均方根(RMS)等评价函数随温度变化曲线，验证了光机设计的合理性。经过高低温可靠性实验对分析结果与变焦光学系统的温度适应性进行了验证。
Abstract
In the light of zoom lenses of optical-electronic counteraction platform, an opto-mechanical structure is designed and thermal optical property is analyzed. Based on 30～120 mm zooming design requirement, the cam mechanism is adopted to design. In order to ensure that the optical system can obtain high resolution images under high-low temperature, thermal deformation of the whole machine under highlow temperature and rigid body displacement under axial temperature field are analyzed by means of finite element method. Subsequently, mirror surface after thermal deformation is fitted by Zernike annular polynomials and introduces into Zemax to obtain variation curve of modulation transfer funciton (MTF), peakto-valley (PV), root mean square (RMS) evaluation function with temperature change to proof of optomechanical design rationality. Finally, the analysis results and temperature adaptability of zoom lenses are verified through high-low temperature reliability experiments.
柳鸣, 张国玉, 耿树彬, 肖作江, 韩旭. 光电平台变焦镜头光机结构设计及热光学分析[J]. 光学学报, 2015, 35(8): 0812003. Liu Ming, Zhang Guoyu, Geng Shubin, Xiao Zuojiang, Han Xu. Opto-Mechanical Structure Design and Thermal Optical Analysis on Zoom Lenses of Optical-Electronic Platform[J]. Acta Optica Sinica, 2015, 35(8): 0812003.
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