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对于现场中常见的光滑球面指印进行无损提取。方法利用常见器材和相机自带的多重曝光功能,使用光学方法拍照光滑球面指印。结果经过LED面光源配光,运用漫反射原理,通过二次曝光法完整的提取不锈钢球面上的指印,记录实验结果。结论利用面光源配合相机多重曝光功能提取光滑球面上的指印,方法简便,对无损检验提供很大帮助。使用多重曝光法对球面客体进行多次曝光可以有效解决光线不均匀问题,同时结合漫反射法去除了反射光斑,清晰完整的显现球面指印。
For non-destructive extraction of the smooth spherical fingerprints common in the field. Methods Using multiple exposures of common equipment and cameras, use optical methods to take glossy spherical fingerprints. Results LED surface light source with light distribution, the use of diffuse reflection principle, by double exposure method complete extraction of stainless steel spherical fingerprints, record the experimental results. Conclusion The use of surface light source with camera multiple exposure function to extract fingerprints on smooth spheres is simple and convenient and provides great help for non-destructive testing. The multiple exposures to spherical objects can effectively solve the problem of uneven light, meanwhile remove the reflected speckle with the diffuse reflection method to clearly and completely show the spherical fingerprints.