Direct readout apparatus for measuring light transmitted...

Details Direct readout apparatus for measuring light transmitted... Direct readout apparatus for measuring light transmitted...

G - Physics

01

J

73/56

G01J 3/50 (2006.01) G01N 21/25 (2006.01) G01N 21/27 (2006.01)

Patent

CA 1144389

TITLE DIRECT READOUT APPARATUS FOR MEASURING LIGHT TRANSMITTED THROUGH LIQUIDS ABSTRACT An apparatus that measures light transmitted through a fluid sample and provides a direct readout of such a measurement by electronically converting light transmitted to an electrical signal that is displayed on a readout device; the apparatus contains a power source, a light source, a photodetector, a sample holder for samples that forms a cell; the improvements used in the apparatus are as follows: (a) a color interference filter positioned between the sample and the photodetector which filters out unwanted bands of color, (b) a converter which electronically converts a current signal from the photodetector to a voltage signal, (c) a logarithmic response circuit that changes the voltage signal to a logarithmic signal proportional to the logarithm of the voltage signal; and (d) a digital voltmeter that converts the logarithm signal to a signal that is displayed on a readout device. FF-6111

367116

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