LIU Yang, AN Xiao-qiang, DENG Jian. Removal of stray radiation from warm shields in cooled infrared optical systems[J]. Journal of Applied Optics, 2012, 33(1): 186-190.
Citation: LIU Yang, AN Xiao-qiang, DENG Jian. Removal of stray radiation from warm shields in cooled infrared optical systems[J]. Journal of Applied Optics, 2012, 33(1): 186-190.

Removal of stray radiation from warm shields in cooled infrared optical systems

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  • Stray radiation may be introduced after warm shields are mounted in cooled infrared systems. The stray radiation consists of radiation and reflection from the warm shields. Since it degrades the SNR, dynamic range and image quality of the system, it shall be avoided by design. The stray radiation was analyzed based on the theory of radiation and heat transfer, and NETD was calculated. The scheme to avoid stray light effects was proposed and verified by ray tracing. The stray radiation of flat shields and spherical reflective shields was analyzed and compared in LIGHT TOOLS. Stray radiation effects were avoided if spherical reflective warm shields with proper radius are properly positioned. A spherical reflective warm shield with radius 30.3mm was used to replace the original flat one, and the stray radiation dropped by more than 99%.
  • [1]VIZGAITIS J N. Dual f/number optics for 3rd generation FLIR systems [J]. SPIE,2005,5783:875-886.
    [2]DESLIS APOSTOLOS. Optical design of a warm shield for the 8~12 micron wavelength region [J]. SPIE,2006,6288:628803.
    [3]牛金星,周仁魁,刘朝晖,等. 红外探测系统自身热辐射杂散光的分析[J]. 光学学报,2010,30(8):2267-2271.
    NIU Jin-xing,ZHOU Ren-kui,LIU Chao-hui,et al. Analysis of stray light caused by thermal radiation of infrared detection system [J]. Acta Optica Sinica,2010,30(8):2267-2271. (in Chinese with an English abstract)
    [4]杨开宇,王飞宇,金宁,等. 利用OptisWorks 对红外热像仪进行内部杂散光分析[J] .红外技术,2010,32(8):443-448.
    YANG Kai-yu,WANG Fei-yu,JIN ning,et al. Analysis of interior stray light for infrared thermal imager by OptisWorks[J] .Infrared Techelonogy,2010,32(8):443-448. (in Chinese with an English abstract)
    [5]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.
    HUANG Qiang,NIU Xin-hua,SHEN Xue-min. Stray radiation analysis caused by interior heat radiation in infrared optical systems[J].Infrared Techelonogy,2006,28(6),348-352. (in Chinese with an English abstract)
    [6]齐超,李文娟,戴景民. 红外双向反射率测量应用及研究进展[J].激光与红外,2005,35(6):391-393.
    QI Chao,LI Wen-juan,DAI Jing-ming. Application and research progress of the infrared bidirectional reflectance measurement [J]. Laser&Infrared,2005,35(6):391-393. (in Chinese with an English abstract)
    [7]帅永,刘彬,杨果,等. 微粗糙硬铝表面双向反射特性试验研究[J] .工程热物理学报,2010,31(4):671-674.
    SHUAI Yong,LIU Bin,YANG Guo,et al. Experimental study on bidirectional reflectance distribution function from micro-rough duralumin surfaces[J] . Journal of Engneering of Thermophysics,2010,31(4):671-674.(in Chinese with an English abstract)
    [8]ROBERT SIEGEL, JOHN R HOWELL. Thermal radiation heat transfer [M]. USA:Hemisphere Publishing Corporation,1969.
    [9]WARREN J S. Modern optical engineering [M]. USA: MacGrawhill Companies,2000.
    [10]刘林华,阮立明,谈和平,等. 红外辐射特性与传输的数值计算[M]. 哈尔滨 : 哈尔滨工业大学出版社,2006.
    LIU Lin-hua,RUAN Li-ming,TAN He-ping,et al. Transfer and numerical caculation of Infrared radiation[M]. Harbin:Harbin Institute of Technology Press,2006.(in Chinese)
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