透明材料上的透明附着物证检测

Testing of transparent physical evidence on transparent objects

目的提出了一种检测透明材料上附着透明物证的新方法—位相滤波法。方法采用现代光学信息处理技术改变光信号的频谱,使零级频谱与一级频谱干涉。结果实现了由位相到强度的调制,最终检测到透明材料上的透明附着物证。结论该方法是一种无损光学检测法,操作简便,效果好。

A new method of detecting the transparent physical evidence on transparent material, phase filtering method is introduced. By adopting modem optics information processing technology and changing frequency spectrum of optical signal, zero frequency spectrum was enabled to interfere with the first class frequency spectrum. Therefore modulation from the phase to the intensity was realized, and transparent physical evidence on transparent objects was finally observed and detected.