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首页> 外文会议>Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter pt.2 >Stray light from galactic sky and zodiacal light for JWST
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Stray light from galactic sky and zodiacal light for JWST

机译：银河系天空产生的杂散光和JWST的黄道光

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The open telescope design of the James Webb Space Telescope (JWST) allows light from off-axis sources to scatter into the instrument field of view. The significant sources of stray light in the near IR and the mid-infrared waveband are galactic light and reflected sunlight and thermal emission from the zodiacal dust. The stray light from these sources was calculated with the ASAP software. Backward ray tracing was efficiently used in the prediction of the stray light from the sky. Since the galactic and zodiacal light is distributed over the whole sky, the sky was divided into 7200 patches of size 3° by 3°, and the contribution from each patch was calculated. The instrument geometric susceptibility for each sky patch was calculated with backward ray tracing. Multiplying the geometric susceptibility and the sky radiance, we are able to calculate the stray light from each sky patch. Total stray light from the full sky is then calculated by summing the individual patch contributions. The stray light from the galactic sky and zodiacal light has been calculated for different orientations of the observatory relative to the sky.
机译：詹姆斯·韦伯太空望远镜（JWST）的开放式望远镜设计使来自轴外光源的光散射到仪器的视场中。近红外和中红外波段中杂散光的主要来源是银河光和反射的太阳光以及黄道尘埃产生的热辐射。使用ASAP软件计算了来自这些光源的杂散光。向后光线跟踪被有效地用于预测来自天空的杂散光。由于银河和黄道光分布在整个天空中，因此将天空分成3200 x 3°的7200个小块，并计算了每个小块的贡献。通过向后光线追踪计算每个天空斑块的仪器几何磁化率。将几何敏感性和天空辐射度相乘，我们能够计算每个天空斑块的杂散光。然后，通过将各个补丁的贡献相加来计算来自整个天空的总杂散光。对于天文台相对于天空的不同方向，已经计算了来自银河天空的杂散光和黄道光。

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