The most significant tool of a
document examiner is his or her vision. In addition to this tool, the outer
tools which facilitate the examiner to see, evaluate and record more than is
evident to the unaided eye. The microscope is the instrument that makes it
possible to see physical evidence on documents which would otherwise remain
invisible and useless. The normal unaided human eye can differentiate only 250
separate lines to the inch. This means that the small details which involve
proportions or separations of less than 1/250th of an inch are not seen by the
eye, and sees them as a connected, solid mass. These tools can be grouped into
six categories:
1. Basic measuring tools
2. Magnification (magnifiers/
microscopes)
3. Light Sources
4. Special Instruments
5. Photography
6. Computer
Let us learn about these tools in the given video lecture.
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