Patent · US Active

Detecting species in a dilute medium

US9244006B2 · kind B2 · utility

1Cited by

3References

26Claims

0Family size

Assignee

THE SCIENCE AND TECHNOLOGY FACILITIES COUNCIL · GB

Inventors

Damien Weidmann · Reading, GB
Gerard Wysocki · Princeton, US

Key dates

Filing date	Nov 12, 2010
Grant date	Jan 26, 2016
Priority date	—
Expiry date	May 30, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG01N21/45
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Method and apparatus for detecting a species in a dilute medium, the species having a spectral feature, the apparatus comprising: a beam source arranged to generate a first laser beam and a second laser beam coherent with each other, and having a matching chirp pattern. Beam guide arranged to pass at least the first laser beam through the dilute medium; a beam mixer arranged to mix the first and the second laser beams to form a mixed beam. Detector arranged to detect, during the chirp pattern, the mixed beam and to measure changes in the mixed beam caused by refractive index variations in the dilute medium across a spectral feature. Output providing a signal that changes in response to the measured changes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.