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首页> 外文会议>Optical System Contamination: Effects, Measurement, Control III >Effects of cryocontaminants on cryogenic superpolished mirror and superpolished quartz crystal microbalance
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Effects of cryocontaminants on cryogenic superpolished mirror and superpolished quartz crystal microbalance

机译：冷冻污染物对低温超抛光镜和超抛光石英晶体微量天平的影响

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Abstract: Effects of contaminants on optical surfaces is a continuing concern for space- based systems. Many systems contain cryogenic optical systems that operate at temperatures where gases such as nitrogen, oxygen, carbon dioxide, and water will condense. This study presents experimental results of the effects of these gases condensed on highly polished (superpolished) mirror surfaces cooled to temperatures as low as 15 K under vacuum conditions. Using these gases as contaminants, the Bidirectional Reflectance Distribution Function (BRDF) was obtained at a wavelength of 0.6328 $mu@m for various contaminant film thicknesses up to 8 $mu@m. Most of the data were obtained using as the mirror surface the superpolished sense crystal of a previously developed quartz crystal microbalance (SPQCM). The SPQCM allowed the mass of the actual contaminant layer to be measured directly.!13
机译：摘要：污染物对光学表面的影响一直是天基系统关注的问题。许多系统都包含低温光学系统，该系统在诸如氮气，氧气，二氧化碳和水等气体会凝结的温度下运行。这项研究提出了这些气体在真空条件下冷凝至冷却至低至15 K的温度的高度抛光（超抛光）镜表面上的冷凝气体影响的实验结果。使用这些气体作为污染物，对于各种厚度达8μm的污染物膜，在0.6328μm的波长下获得了双向反射分布函数（BRDF）。大多数数据是使用先前开发的石英微天平（SPQCM）的超抛光感测晶体作为镜面获得的。 SPQCM允许直接测量实际污染物层的质量。！13

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