Method and devices for laser induced fluorescence attenuation spectroscopy
US6124597A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1997 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Jul 7, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/06193
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The Laser Induced Fluorescence Attenuation Spectroscopy (LIFAS) method and apparatus preferably include a source adapted to emit radiation that is directed at a sample volume in a sample to produce return light from the sample, such return light including modulated return light resulting from modulation by the sample, a first sensor, displaced by a first distance from the sample volume for monitoring the return light and generating a first signal indicative of the intensity of return light, a second sensor, displaced by a second distance from the sample volume, for monitoring the return light and generating a second signal indicative of the intensity of return light, and a processor associated with the first sensor and the second sensor and adapted to process the first and second signals so as to determine the modulation of the sample. The methods and devices of the inventions are particularly well-suited for determining the wavelength-dependent attenuation of a sample and using the attenuation to restore the intrinsic laser induced fluorescence of the sample. In turn, the attenuation and intrinsic laser induced fluorescence can be used to determined a characteristic of interest, s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.