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贴片散斑法将一种可剥离铝箔贴附在试件表面,经随机划痕制栅后,以其精细的光学结构和高度的反射本领,在白光或激光照射下,表面辐射率随机分布函数作为散斑场,采取直接记录手段,用全息底片对此作物体变形前后的两次曝光,所得到的散斑底片将包含宽广的空间频谱范围,且全场分析条纹清晰、灵敏度高、量程调节范围大。此方法不仅适用于各种材料的直接散斑法测量,具有经济、可靠、操作简便的特点,还能应用于平面及可展曲面构件的现场量测。
Chip speckle method A peelable aluminum foil attached to the surface of the specimen, after random scratching grid, with its fine optical structure and a high degree of reflection, under white or laser irradiation, the surface emissivity random distribution Function as a speckle field, using direct recording means, using holographic film on the subject before and after deformation for the two exposures, the resulting speckle film will contain a wide range of spatial frequency spectrum, and the full analysis of stripes clear, high sensitivity, range Large adjustment range. The method is not only suitable for the direct speckle measurement of various materials, but also has the advantages of economy, reliability and easy operation. It can also be applied to the field measurement of plane and developable surface components.