【摘要】 观察了当相干激光以不同入射角照射 4个等级的平磨和外圆磨样块时记录的散斑图像中散斑强度的变化。通过分析可知对比度与表面粗糙度之间存在密切的关系 ,入射角又直接影响对比度 ,不同的入射角适合不同的加工方法和测量范围。因此找到合适的入射角可提高实验系统的精度和分辨率更多还原

【Abstract】 Incidence angle has some influences on the speckle intensity. According to the observation on the changes of speckle intensity, irradiated by laser from different incident angles to 4 level flat lapped and ground samples, it brings the result that the incidence angle is changed in different measurement range and a reasonable incidence angle may improve the precision and range of measurement.更多还原