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首页> 外文会议>Optical Systems Degradation, Contamination, and Stray Light: Effects, Measurements, and Control II >Measuring Reality, Solving the Slope Dilemma and Redefining the Particle Size Distribution Model
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Measuring Reality, Solving the Slope Dilemma and Redefining the Particle Size Distribution Model

机译：测量真实度，解决坡度难题并重新定义粒度分布模型

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In contamination control technology relatively dirty surfaces cannot be specified with the same defining equations as those for "clean" surfaces. The current practices in the aerospace community disregard this inaccuracy in defining and specifying gradations of surface cleanliness. Using a 0.926 slope with an IEST-STD-CC1246D particle distribution to describe cleanliness on dirty surfaces, or surfaces subjected to fallout, is inaccurate, unrealistic, misleading, and often impossible to verify. Most importantly, using this model provides incorrect information to experts who calculate sensor performance: a slope of 0.926 is appropriate only for cleaned surfaces. However, the industry continues to use the same slope to describe all surfaces, clean or dirty. Current measurements taken from Raytheon labs have shown that particle distributions dominated by fallout typically have a slope between 0.3 and 0.5, in concurrence with previous studies. Based on the accumulated data, the authors propose that particle distributions for dirty surfaces be described by a second model, which should be incorporated into the next revision of IEST-STD-CC1246.
机译：在污染控制技术中，不能用与“清洁”表面相同的定义方程式来指定相对较脏的表面。航空航天界的当前做法在定义和指定表面清洁度等级时忽略了这种不准确性。使用具有IEST-STD-CC1246D粒子分布的0.926坡度来描述肮脏表面或易掉落的表面的清洁度是不准确，不现实，具有误导性的，并且通常无法验证。最重要的是，使用此模型为计算传感器性能的专家提供了错误的信息：0.926的斜率仅适用于清洁的表面。但是，该行业继续使用相同的坡度来描述所有清洁或肮脏的表面。雷声公司实验室的最新测量结果表明，与以前的研究相一致，以尘埃为主的颗粒分布通常具有0.3至0.5的斜率。基于累积的数据，作者建议用第二种模型描述脏表面的颗粒分布，该模型应纳入IEST-STD-CC1246的下一个修订版中。

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