Systems and methods for measuring a physical parameter of a substance based on an isoclinic point in the absorption spectrum of another substance
US8873061B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2013 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Sep 5, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/39
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods measure a physical parameter of a first substance having an absorption feature that varies based on the physical parameter. A tunable-frequency laser may transmit a first laser beam through the first substance and a second laser beam through a second substance having an isoclinic point. A first output is based on an intensity of the first laser beam transmitted through the first substance, and a second output is based on an intensity of the second laser beam transmitted through the second substance. Controller circuitry locks a first frequency of the first laser beam to the absorption feature based on the first output, and locks a second frequency of the second laser beam to the isoclinic point based on the second output. Measurement circuitry calculates the physical parameter of the first substance based on a difference between the first and second frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.