Study on identifying transparent bits of broken glass by laser interference fringe
Yang Woo Yu · 1999
Whether two or more pieces of glass are part of the same block is a common problem in forensic examination identification. Transparent plane glass has homogeneous index of refraction. Its interference fringe is obviously regular and continuous, influenced only by thiekness. So we can identify whether two or more pieces of glass are part of the same block by using laser and interference fringe to compare the identfication of fringes form, feature and direction and to see if the fringes at joint is continuous, regular and without overlapping. It is proved by practice that this method is an effective measure for identification.