Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1994-05-09
1995-10-03
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
2504581, 356334, G01J 318, G01N 2164
Patent
active
054556740
ABSTRACT:
A method of illuminating a deposition of organic material such as, blood, sweat or oil for forensic examination is disclosed. Light having a wide range of wavelengths is generated and directed towards a reflective diffraction grating. The relative position of an exit slit with respect to the grating is adjusted to pass a desired band of wavelengths of output light from portions of the light reflected by the grating. The output light is then directed toward the deposition to be examined through the use of a fiber optic bundle, preferably a liquid fiber optic member. Adjustment of the relative position of the exit slit with respect to the grating is achieved by rotation of the grating. Movement is controlled by an electronic control and a handheld remote control pad.
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Evans F. L.
Instruments SA, Inc.
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