介绍了一种基于光散射原理的便携式激光表面粗糙度测量仪。它采用半导体激光器为光源，以远心光路结构接收、处理经粗糙表面调制的散射光带，成功地解决了粗糙度测量精度高低与测量范围大小相矛盾的问题。仪器结构简单、操作方便、测量效率高，精度能满足生产实际的需要 A portable laser surface roughness measuring instrument based on light scattering principle is introduced. It adopts the semiconductor laser as the light source, and receives the scattering light band modulated by the rough surface by the telecentric optical path structure, thus successfully solving the problem that the accuracy of the roughness measurement is incompatible with the measurement range size. The instrument structure is simple, easy to operate, high measurement efficiency, accuracy can meet the actual needs of production