Photometer apparatus

Details Photometer apparatus Photometer apparatus

1996-11-15

1998-04-28

Evans, F. L.

Optics: measuring and testing

By shade or color

With color transmitting filter

25033912, 250373, G01N 2127

Patent

active

057452431

ABSTRACT:
A photometer for measuring electromagnetic radiation absorption of a sample utilizing a source of the electromagnetic radiation. Electromagnetic radiation is conducted from the source, to a sample sensor, and is passed through the sample utilizing a sample cell. The electromagnetic radiation is then directed to a detection system which determines absorbance of electromagnetic radiation by the sample at the sample cell. The detection system includes a beam splitter which receives the electromagnetic radiation and outputs first and second beams. A first detector having a first wavelength filter and a second detector having a second wavelength filter receives the two beams from the splitters. One detector may be employed to produce a reference signal. The remaining detector or detectors produce an output signal which is a representation of a characteristic, such as absorbance of the sample. The output signals are operated on by a reference signal, and converted into a measurement absorbance.

REFERENCES:
patent: 3532434 (1970-10-01), Jones, Jr. et al.
patent: 3941487 (1976-03-01), Ehret et al.
patent: 4637730 (1987-01-01), Ponstingl et al.
patent: 4657398 (1987-04-01), Brunsting

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