Suppression of stray light in a catadioptric and re-imaging LWIR system

Meng Weihua; Xiang Jiansheng; Ni Guoqiang

Stray light suppression in a catadioptric and re-imaging LWIR system was discussed. The optical system which comprised a classical R-C reflective optics and a re-imaging refractive optics was designed for a compact and low-cost ⅡR seeker. The source and path of stray light in this system were investigated by simulating the optic-mechanical model with LightTools. According to the simulation, the mechanical light stops were built, and the performance of stray light suppression was analyzed. After assembled, the optical system and its anti-stray light effect were evaluated by testing the angle limit away from the sun. The results of simulation and test indicate that there is no influence of stray light on the LWIR system outside 7 from optical axis.

1. School of Optoelectronics,Beijing Institute of Technology,Beijing 100081,China;

2. Aviation Key Laboratory of Science and Technology on Airborne Guided Weapons,China Airborne Missile Academy,Luoyang 471009,China

Received Date: 2013-02-28

Rev Recd Date: 2013-03-13

Publish Date: 2013-04-25

Key words:

Abstract: Stray light suppression in a catadioptric and re-imaging LWIR system was discussed. The optical system which comprised a classical R-C reflective optics and a re-imaging refractive optics was designed for a compact and low-cost ⅡR seeker. The source and path of stray light in this system were investigated by simulating the optic-mechanical model with LightTools. According to the simulation, the mechanical light stops were built, and the performance of stray light suppression was analyzed. After assembled, the optical system and its anti-stray light effect were evaluated by testing the angle limit away from the sun. The results of simulation and test indicate that there is no influence of stray light on the LWIR system outside 7 from optical axis.

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[1]	Huang Qiang, Niu Xinhua, Shen Xuemin. Stray radiation analysis caused by interior heat radiation in infrared optical systems[J]. Infrared Technology, 2006, 28(6): 348-352. (in Chinese) 黄强, 钮新华, 沈学民. 红外光学系统内部热辐射引起的杂散辐射分析[J]. 红外技术, 2006, 28(6): 348-352.
[2]
[3]
[4]	Andrew T Y. Design of cassegrain light shields[J]. Applied Optics, 1967, 6(6): 1063-1067.
[5]	Zhang Guoyu, Cao Weiguo, Gao Yujun, et al. The methods of analysis and calculation for stray light in optical system[J]. Journal of Changchun Institute of Optics and Fine Mechanics, 1995, 18(4): 21-24. (in Chinese) 张国玉, 曹维国, 高玉军, 等. 光学系统杂散光的计算与分析方法[J]. 长春光学精密机械学院学报, 1995, 18(4): 21-24.
[6]
[7]
[8]	Li Hui, Li Yingcai. Mathematical and physical model for a simplified stray light analysis method[J]. Acta Photonica Sinica, 1996, 25(7): 665-672. (in Chinese) 李晖, 李英才. 一种简化杂光分析方法的数理模型[J]. 光子学报, 1996, 25(7): 665-672.
[9]
[10]	Gao Guopeng, Xiong Wang'e, Gang Yuquan, et al. Design and estimation of suppressing stray light in R-C system[J]. Optical Instruments, 2009, 31(5): 36-37. (in Chinese) 高郭鹏, 熊望娥, 甘玉泉, 等. R-C系统消杂散光设计与效果评估[J]. 光学仪器, 2009, 31(5): 36-37.
[11]	Wang Meiqin, Wang Zhonghou, Bai Jiaguang. Stray light analysis for hyper-spectral imaging spectrometer[J]. Infrared and Laser Engineering, 2012, 41(6): 1532-1537. (in Chinese) 王美钦, 王忠厚, 白加光. 高光谱成像仪的杂散光分析[J]. 红外与激光工程, 2012, 41(6): 1532-1537.
[12]
[13]	Xiang Jiansheng, Pan Guoqing, Zhang Yunqiang, et al. The design of reflective and refractive reimaging infrared optic system used in air-to-air missile[J]. Infrared Technology, 2011, 33(8): 457-459. (in Chinese) 项建胜, 潘国庆, 张运强, 等. 应用于空空导弹的二次成像折反式红外光学系统的设计[J]. 红外技术, 2011, 33(8): 457-459.
[14]
[15]	Robert E F, Biljana T G. Optical System Design[M]. NewYork: McGraw-Hill, 2004: 250-254.
[16]
[17]
[18]	Xiang Jiansheng, Pan Guoqing, Zhang Yunqiang, et al. The design of catadioptric and reimaged LWIR athermalization system[J]. Infrared Technology, 2012, 34(11): 644-647. (in Chinese) 项建胜, 潘国庆, 张运强, 等. 一种折反二次成像式长波无热化光学系统设计[J]. 红外技术, 2012, 34(11): 644-647.
[19]
[20]	Zhong Xing, Zhang Lei, Jin Guang. Stray light removing of reflective optical syatem[J]. Infrared and Laser Engineering, 2008, 37(2): 316-318. (in Chinese) 钟兴, 张雷, 金光. 反射光学系统杂散光的消除[J]. 红外与激光工程, 2008, 37(2): 316-318.
[21]	Yan Peipei, Fan Xuewu. Optical design and stray light analysis of R-C system[J]. Infrared Technology, 2011, 33(4): 214-217. (in Chinese) 闫佩佩, 樊学武. R-C光学系统设计与杂散光分析[J]. 红外技术, 2011, 33(4): 214-217.

Suppression of stray light in a catadioptric and re-imaging LWIR system

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