Multiple path length transmittance measuring device

Details Multiple path length transmittance measuring device Multiple path length transmittance measuring device

2007-07-06

2011-12-13

Chowdhury, Tarifur (Department: 2886)

Optics: measuring and testing

For light transmission or absorption

Of fluent material

C356S440000, C356S442000

Reexamination Certificate

active

08077315

ABSTRACT:
A device to measure the amount of light able to transmit through a test liquid sample. A single lamp is used to illuminate a liquid sample cell containing the test water. A light detector is fixed relative to the lamp and is used to detect the amount of light from the lamp able to transmit through the liquid sample cell. The liquid sample cell is shaped in such a way as to provide at least two sets of opposed side walls that are able to transmit the light emitted from the lamp, where each set of opposed side walls defines a different path length through the liquid sample in the liquid sample cell. A rotation mechanism is used to provide relative rotation between the liquid sample cell and the lamp/light detector assembly. A microprocessor connected to the light detector calculates the light transmitted through at least two different path lengths through the liquid sample. Using these calculated transmittances the microprocessor then calculates the overall transmittance of the test water.

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