Optics: measuring and testing – For light transmission or absorption – Of fluent material
Reexamination Certificate
2011-01-04
2011-01-04
Toatley, Gregory J (Department: 2877)
Optics: measuring and testing
For light transmission or absorption
Of fluent material
C250S339130
Reexamination Certificate
active
07864323
ABSTRACT:
There is described a method for measuring a concentration of a gas component in a measuring gas, wherein the light of a wavelength tunable light source is passed along a single optical path through a measuring volume containing the measuring gas and a reference cell containing a reference gas to a detector. The reference cell is selected to contain a selected isotope of the gas component to be measured in a known abundance ratio higher than the known natural-abundance isotope ratio of the gas component in the measuring volume; the light source is tuned to sweep the wavelength of the light over the absorption lines of the selected isotope and the remaining gas component; and the concentration of the gas component in the measuring volume is calculated from the ratio of the detector signals at the peaks of the absorption lines, based on Lambert's law and taking into account the known abundance isotope ratios.
REFERENCES:
patent: 4410273 (1983-10-01), Mantz et al.
patent: 5026991 (1991-06-01), Goldstein et al.
patent: 5047639 (1991-09-01), Wong
patent: 5173749 (1992-12-01), Tell et al.
patent: 5459574 (1995-10-01), Lee et al.
patent: 5486699 (1996-01-01), Fabinski et al.
patent: 6353225 (2002-03-01), Strzoda et al.
patent: 6452182 (2002-09-01), Zochbauer et al.
patent: 7116422 (2006-10-01), Larking et al.
patent: 2002/0084408 (2002-07-01), Shiokawa et al.
Gurlit et al., “Lightweight diode laser spectrometer CHILD (Compact High-altitude In-situ Laser Diode) for balloon borne measurements of water vapor and methane”, Applied Optics, Jan. 2005, pp. 91-102, vol. 44, Issue 1.
Durry et al., “Atmospheric CH4and H2) monitoring with near-infrared inGaAs laser diodes by the SDLA, a balloonborne spectrometer for tropospheric and stratospheric in situ measurements”, Applied Optics, Dec. 20, 1999, pp. 7342-7354, vol. 38, No. 36.
Scott et al., Airborne Laser Infrared Absorption Spectrometer (ALIAS-II) for insitu atmospheric measurements of N20, CH4, CO, HCL and NO2from balloon or remotely piloted aircraft platforms, Applied Optics, Jul. 20, 1999, pp. 4609-4622, vol. 38, No. 21.
Kluczynski Pawel
Lundqvist Stefan
Siemens Aktiengesellschaft
Slomski Rebecca C
Toatley Gregory J
LandOfFree
Method for measuring the concentration of a gas component in... 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 for measuring the concentration of a gas component in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for measuring the concentration of a gas component in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2722980