Abstract

The great variety of materials examined in a forensic science laboratory requires the use of many techniques and instruments. Most of these involve optical components, and a brief description of some applications of some of these is outlined. The two most commonly used instruments are the microscope and the camera; some unusual applications of the latter are described. The paper also presents some applications of spectrophotometers, x-ray diffraction equipment, neutron activation analysis, and gas chromatography.

© 1969 Optical Society of America

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Figures (8)

Fig. 1
Fig. 1

Two black Polaroid carbons as they appear to the naked eye.

Fig. 2
Fig. 2

An uv fluorescence photograph of the same two Polaroid carbons.

Fig. 3
Fig. 3

Equipment used for ir luminescence photography.

Fig. 4
Fig. 4

Portion of a Canada Savings Bond from which the owner’s name has been erased.

Fig. 5
Fig. 5

An ir luminescence photograph of the same area with the bond owner’s name restored.

Fig. 6
Fig. 6

Prescription for seventy-five tablets of the drug Lomotil.

Fig. 7
Fig. 7

Infrared luminescence photograph of the same presciption.

Fig. 8
Fig. 8

Arsenic concentration dating profile of human hair.

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