Thermal-optical evaluation to optical window of near space aerial remote sensor surrounding hypersonic

Zhang Hongwen; Cao Guohua; Li Yanwei; Zhang Jichao

In order to improve the optical performance of optical window in aerial remote sensor, thermal-optical evaluation to fused silica optical window surrounding hypersonic was analyzed. The flight environment of optical window was analyzed. Based on the theory of aerodynamics, the relation between convection heat transfer coefficient and mach number was calculated. The temperature distributing of optical window was simulated by heat flux density, the optical path difference caused by the temperature difference between the inner and outer surfaces was calculated, and the influence of thermal deformation of the optical window on optical transfer function was analyzed. The study result shows that the optical path difference caused by thermal deformation of the optical window is 130.5 nm, which is under 1/4. The simulation result meets the requirements of the optical design. The above result discussed in this paper can be used as a reference for other optical window designs.

1. College of Mechanical and Electric Engineering Changchun University of Science and Technology,Changchun 130025,China;

2. Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China

Received Date: 2014-04-05

Rev Recd Date: 2014-05-15

Publish Date: 2014-12-25

Key words:

Abstract: In order to improve the optical performance of optical window in aerial remote sensor, thermal-optical evaluation to fused silica optical window surrounding hypersonic was analyzed. The flight environment of optical window was analyzed. Based on the theory of aerodynamics, the relation between convection heat transfer coefficient and mach number was calculated. The temperature distributing of optical window was simulated by heat flux density, the optical path difference caused by the temperature difference between the inner and outer surfaces was calculated, and the influence of thermal deformation of the optical window on optical transfer function was analyzed. The study result shows that the optical path difference caused by thermal deformation of the optical window is 130.5 nm, which is under 1/4. The simulation result meets the requirements of the optical design. The above result discussed in this paper can be used as a reference for other optical window designs.

HTML

Reference (19)

[1]
[2]	Wu Xuefeng, Ding Yalin, Wu Qingwen. Thermal design for near space optical remote sensor [J]. Opt Precision Eng, 2010, 18(5): 1159-1165. (in Chinese) 吴雪峰, 丁亚林, 吴清文. 临近空间光学遥感器热设计[J]. 光学精密工程, 2010, 18(5): 1159-1165.
[3]	Li Yanwei, Zhang Hongwen, Zhan Lei, et al. Influence of high altitude environment on optical window in aerial remote sensor [J]. Laser Infrared, 2012, 42(9): 1035-1039. (in Chinese) 李延伟,张洪文,詹磊,等. 高空环境对航空遥感器光学窗口的影响[J]. 激光与红外, 2012, 42(9): 1035-1039.
[4]
[5]	Zhang Hongwen, Cao Guohua, Li Yanwei, et al. Influence of three section type optical window on imaging quality of aerial camera [J]. Infrared and Laser Engineering, 2013, 42(6): 1623-1627. (in Chinese) 张洪文, 曹国华, 李延伟, 等. 三折式光学窗口对航空相机成像的影响[J]. 红外与激光工程, 2013, 42(6): 1623-1627.
[6]
[7]	Liu Weiyi. Thermal design and analysis for the opto-mechanical structure of a high-resolution aerial camera [D]. Changchun: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 2012. (in Chinese) 刘伟毅. 高分辨率航空相机光机结构的热设计及热分析[D]. 长春: 中国科学院长春光学精密机械与物理研究所, 2012.
[8]
[9]
[10]	Li Yanwei, Yang Hongbo, Cheng Zhifeng, et al. Thermal/structural/optical integrated design for optical window in aerial remote sensor [J]. Infrared and Laser Engineering, 2012, 41(8): 2102-2106. (in Chinese) 李延伟, 杨洪波, 程志峰, 等. 航空遥感器光学窗口光机热一体化设计[J]. 红外与激光工程, 2012, 41(8): 2102-2106.
[11]
[12]	Li Ming. The research of precision thermal control technology for a CCD mapping camera [D]. Changchun: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 2010. (in Chinese) 黎明. 测绘相机精密热控制技术研究[D]. 长春: 中国科学院长春光学精密机械与物理研究所, 2010.
[13]	Cullimore B, Panczak T, Baumann J, et al. Integrated analysis of thermal structural-optical-systems [Z]. USA: Society of Automotive Enginneers, 2002.
[14]
[15]
[16]	Zhao Lixin. Thermal-optical evaluation to optical windows of space camera[J]. Acta Optica Sinica, 1998, 18(10): 1440-1444. (in Chinese) 赵立新. 空间相机光学窗口的热光学评价[J]. 光学学报, 1998, 18(10): 1440-1444.
[17]
[18]	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): 210-213. (in Chinese) 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): 210-213.
[19]	Ding Yanwei, Han Shuangli, Li Jihui. Analysis for thermo-optical sensitivity of space optical window[J]. Opt-Electronic Engineering, 2002, 29(3): 15-18. (in Chinese) 丁延卫, 韩双丽, 李积慧. 空间光学窗口的热光学灵敏度分析[J]. 光电工程, 2002, 29(3): 15-18.

Thermal-optical evaluation to optical window of near space aerial remote sensor surrounding hypersonic

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Related

Proportional views