反射式椭球面光栏在空间光学遥感器上的应用

发布时间：2018-03-17 22:30

本文选题：遥感器　切入点：椭球面光栏　出处：《航天返回与遥感》2016年02期 　论文类型：期刊论文

【摘要】：空间光学遥感器遮光罩内壁通常会布置消除太阳、地气等外部杂散光的环状光栏,而传统的高吸收率直环环状光栏会显著加大光学系统入光口的黑体面积,尤其在高热流密度的阳光直射遮光罩内壁时,会导致遮光罩内壁及光栏自身温度出现极端高温现象,进而对光学系统前光学镜头的温度稳定度带来负面影响,同时引入了额外的内部红外谱段杂散光。为消除上述弊端,文章给出了一种反射式椭球面光栏的设计方案。针对地球静止轨道遥感器在轨飞行环境及入光口特征,采用UG NX热分析软件建立了热仿真模型,并通过软件中的蒙特卡罗法统计、对比了该反射式椭球面光栏与传统直环光栏的热负荷及杂散光分布情况。结果表明,相比传统光栏,该反射式椭球面光栏在有效消除太阳、地气等外部杂散光的同时,可以将遥感器入光口的热负荷降低60%~70%,避免了入光口的极端高温现象。
[Abstract]:The inner wall of the space optical remote sensor shade will usually be arranged to eliminate the sun, earth atmosphere and other external stray light, while the traditional high absorptivity ring ring light bar will significantly increase the blackbody area of the optical system entrance. Especially when the heat flux is high, the temperature of the inner wall of the mask and the inner wall of the optical barrier will be extremely high temperature, which will have a negative impact on the temperature stability of the optical lens in front of the optical system. At the same time, the extra stray light of internal infrared spectrum is introduced. In order to eliminate the above disadvantages, a design scheme of reflective ellipsoidal light bar is presented, aiming at the characteristics of orbit environment and light entry port of geostationary orbit remote sensor (GSO). The thermal simulation model is established by UG NX thermal analysis software, and the thermal load and stray light distribution of the reflective ellipsoidal light bar are compared with that of the traditional direct ring light bar by Monte Carlo method. The results show that the thermal load and stray light distribution of the reflective ellipsoidal light bar are compared with those of the traditional optical bar. The reflective ellipsoidal light bar can effectively eliminate the external stray light such as the sun and the earth atmosphere, at the same time, it can reduce the heat load of the remote sensor into the light port by 6070, thus avoiding the extreme high temperature phenomenon in the light port.
【作者单位】：北京空间机电研究所;
【基金】：国家高技术研究发展计划重点项目(2008AA121900)
【分类号】：V443.5

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