System for spectroscopic carpet identification
US7671981B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2007 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Oct 29, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3559
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tunable laser spectroscopic carpet identification system comprises a tunable laser spectroscopy system for generating a tunable signal that is transmitted to a carpet sample. The system detects the tunable signal after interaction with the carpet sample so that an analyzer is able to relate a spectral response of the carpet sample to a chemical composition of the carpet sample. In one example, the spectroscopy system comprises a laser cavity in which the tunable signal is generated, a semiconductor gain medium in the laser cavity, and a tunable element for controlling a wavelength of tunable signal generated in the laser cavity. To deal with variations in water content, the analyzer estimates a water content of the carpet sample using the spectral response of the carpet sample and then determines the chemical composition of the carpet sample in part based on the estimate of the water content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.