Optics: measuring and testing – By shade or color – With color transmitting filter
Patent
1987-12-29
1991-07-30
Rosenberger, Richard A.
Optics: measuring and testing
By shade or color
With color transmitting filter
G01J 351
Patent
active
050355082
ABSTRACT:
A light absorption analyzer can work in either a reflection or a transmission mode, according to which probe head is fitted to it.
Light is caused to be of a desired wavelength for the analysis by passing non-monochromatic light from a high-intensity flash tube source (which is not a point source) to an interference filter. Only parallel light emanating from the filter is focused by a concave parabolic mirror on a point where at least one fibre-optic collector is positioned. This light can then be passed directly to the probe for passage through the sample, since it is only light of a specified wavelength which will have travelled parallel from the filter and will therefore be focused at the point. Some of the light is taken off a reference detector to provide a reference signal for comparison with that derived from a test detetor fed by a return fibre-optic from the probe. A comparator is programmed to give a quantitiative readout of the absorption by the test sample.
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Bunce Roger A.
Carter Timothy J. N.
National Research Development Corporation
Rosenberger Richard A.
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