Multifunctional photometer apparatus
US5825478A · kind A · utility
Inventors
Key dates
| Filing date | Nov 13, 1997 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Nov 13, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/1213
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 or sensors, and is passed through or scattered from, 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 compared to a reference signal, and converted into a measurement of absorbance, transmission, reflectance, or turbidity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.