Reconstruction of Fractured Glass by Laser Beam Interferometry

    Volume 24, Issue 1 (January 1979)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Published Online: 1 January 1979

    Page Count: 8


    Thornton, JI
    Associate professor of forensic science, School of Public Health, University of California, Berkeley,

    Cashman, PJ
    Assistant professor of forensic science, California State University, Sacramento, Calif.

    (Received 14 February 1978; accepted 14 June 1978)

    Abstract

    The matching of fractured glass fragments has been extended by von Bremen [1] to include the intrinsic heterogeneities referred to in the glass industry as “ream” [2]. Von Bremen used a fiber optics source to project a shadowgraph of fractured glass onto a photographic film that was then developed. Although this is a powerful method for comparing ream marking, the technique suffers a disadvantage in that the ream cannot readily be seen with the naked eye in all samples. It is readily apparent in container glass, lamp bulb glass, and drawn window glass. In other types of glass including float glass, the photographic film must be developed before it is known whether an image of the heterogeneities of the glass has been adequately recorded.


    Paper ID: JFS10796J

    DOI: 10.1520/JFS10796J

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    Author
    Title Reconstruction of Fractured Glass by Laser Beam Interferometry
    Symposium , 0000-00-00
    Committee E30