Volume 40, Issue 1 (January 1995)

    Fingerprint Imaging with a Confocal Scanning Laser Macroscope

    (Received 24 January 1994; accepted 16 June 1994)

    CODEN: JFSOAD

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    Abstract

    The scanning laser macroscope is a new scanning beam confocal imaging system that scans up to 7.5 cm × 7.5 cm in 5 seconds. One of its unique features is a telecentric f-theta lens that focuses the incoming beam from a low power laser to a 10 µm spot on the sample. The f-theta lens provides a linear scan, and has a flat focal plane. The macroscope is described in detail and its operation is discussed. Confocal reflected-light images of latent fingerprints were obtained on several different materials. Fluorescence images of Rhodamine-treated samples were also obtained. We also show a reflection image of a fingerprint recorded by scanning the finger in air. Other possible uses of the macroscope in forensics include time-resolved fluorescence, imaging of fluorescent gels used in DNA fingerprinting, IR fluorescence imaging of documents, detecting and recording fluorescence images of latent fingerprints excited with UV radiation, and entering file prints into the computer for storage.


    Author Information:

    (Ted) Dixon, AE
    Graduate Student, Guelph-Waterloo Program for Graduate Work in Physics, Waterloo, Ontario

    Beesley, KM
    Graduate Student, Guelph-Waterloo Program for Graduate Work in Physics, Waterloo, Ontario

    Damaskinos, S
    Graduate Student, Guelph-Waterloo Program for Graduate Work in Physics, Waterloo, Ontario


    Stock #: JFS13753J

    ISSN: 0022-1198

    DOI: 10.1520/JFS13753J

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    Author
    Title Fingerprint Imaging with a Confocal Scanning Laser Macroscope
    Symposium , 0000-00-00
    Committee E30