Method of performing continuous on-line laser emission spectroscopic analysis on a flowing fluid sample by laser and apparatus therefor
US4652128A · kind A · utility
2Cited by
2References
9Claims
0Family size
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Key dates
| Filing date | Dec 13, 1984 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Dec 13, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/695
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A focusing lens having a focal length f is provided at a position spaced a distance L apart from a substance to be measured in the fluid state, the relationship between L and f is controlled, so that the formula: EQU 0.95f.ltoreq.L.ltoreq.1.05f is constantly satisfied, and the light emitted when a high output pulse laser irradiates the surface of the substance to be measured is analyzed spectroscopically so that the influence of variations on the surface of the substance to be measured can be avoided and a stabilized laser emission spectroscopically analysis on-line can be conducted as the substance to be measured flows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.