Prismatic device for use with process refractometers
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United States of America Patent
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May 3, 1994
Grant Date -
N/A
app pub date -
Sep 3, 1992
filing date -
Sep 18, 1991
priority date (Note) -
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Abstract
A prism providing an optical window for a process refractometer. The prism is manufactured from a material that has predetermined optical properties and a refractory index higher than the refractory index of the process material to be measured. One face of the prism is arranged to provide an interface in contact with the process material to be measured. To optimise the selection of the material of the prism, an optically transparent material layer is provided onto the surface of the interface in contact with the process material, the refractory index of the material layer being higher than the refractory index of the material that the prism is manufactured from.
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