System for chemical analysis
US4771629A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1987 |
| Grant date | Sep 20, 1988 |
| Priority date | — |
| Expiry date | Mar 10, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved system for quantitative chemical analysis incorporates a chromatographic column. A radiation source of a predetermined range of wavelengths is in optical communication with an emerging specie from the chromatographic column by of a first optical path whereby radiation is modified by characteristic of the specie. A detector is in optical communication with the emerging specie by a second optical path whereby a first output signal reflective of the detected radiation is generated. An acousto-optic tunable filter system is disposed in one of either the first or second optical paths. The radiation is passed through the crystal at a predetermined angle relative to the crystal's optic axis. An acoustic transducer is coupled to the crystal to launch acoustic waves into the crystal to interact with a selected narrow bandwidth portion of the radiation to make it distinguishable from the remaining radiation. A computer to which the detector output signal is applied determines the emerging specie by the identifiable characteristics. An auxiliary detector responsive to the emerging specie can be associated with the chromatographic column. A parallel optical path can also be include…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.