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ＣＵ９５０５ 激光钢球表面粗糙度测量仪是根据激光散斑理论和简化数学模型（ φｎ ＝ ψｎ ＋ Ｈｎ） 进行设计，并通过理论分析推荐出不同大小的钢球与传感器接收距离的数学公式，文中给出了测量原理框图和流程图。附图７ 幅，参考文献３ 篇。
CU9505 laser steel ball surface roughness measuring instrument is designed according to the laser speckle theory and the simplified mathematical model (φn = ψn + Hn), and the mathematical formulas of the receiving distance of steel balls and sensors with different sizes are proposed through theoretical analysis. Out of the measurement principle diagram and flow chart. Figure 7, reference 3 articles.