Modulation cancellation method in laser spectroscopy
US8009293B2 · kind B2 · utility
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10References
32Claims
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Key dates
| Filing date | Nov 9, 2006 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Jan 19, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/1704
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Novel methods and laser spectroscopic systems for accurately measuring the concentration of compounds are disclosed herein. The disclosed methods utilize a modulation cancellation technique resulting in a significantly increase in the sensitivity and accuracy of laser spectroscopic measurements. In general, the methods and systems utilize modulation phase-shifting and amplitude attenuation to cancel the signals detected from at least two modulated light beams. Thus, any signal detected will be directly proportional to the concentration measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.