Method and apparatus for spectroscopic measurement of the...

Details Method and apparatus for spectroscopic measurement of the... Method and apparatus for spectroscopic measurement of the...

G - Physics

01

J

73/55

G01J 3/433 (2006.01)

Patent

CA 2007240

Abstract Method and apparatus for spectroscopic measurement of the concentration of a gas in a sample where you detect the intensity of light from a light source (1) passed through the sample (4) and through a reference cell (5) and gene- rates a signal which represents the concentration of the gas. A laser diode (1) constitutes the light source which is locked to the absorption line of the gas at known con- centration and pressure contained in a reference cell (5) The laser light with the properly selected wavelength is distributed via optical fibers (2,3,6) and/or glass prisms (19,20) to the reference cell (5) and the sample (4). Nongasrelated transmission variations in the measurement path or in the optics is automatically compensated for by a special laser modulation which generates a time multiplexed reference. The measurement can be performed in a measurement cell incorporating several reflective mirrors (30) to reflect the laser beam several times inside the measurement cell thereby increasing the effective length of the measure- ment path. The measurement can also be performed using an optical fiber designed so that the surrounding gas or fluid via the evanescent field effects the laser light so that the concentration of the substance in question in the surround- ing fluid or gas can be determined.

Affiliated with

Also associated with

Rating

Method and apparatus for spectroscopic measurement of the... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for spectroscopic measurement of the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for spectroscopic measurement of the... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1710538