Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1998-04-23
1999-11-09
Turner, Samuel A.
Optics: measuring and testing
By particle light scattering
With photocell detection
702 28, G01B 902
Patent
active
059824867
ABSTRACT:
A method for improving the sensitivity of a Fourier transform infrared (FTIR) spectrometer, especially one which is mounted on a movable platform, includes the step of obtaining a background spectrum and an analytical spectrum from an interferogram, and determining the absorption spectrum from the analytical spectrum and the background spectrum. Then, a classical least squares analysis is applied to the absorption spectrum, with reference to a reference spectrum. The classical least squares analysis removes the bias term, and the first and the second-order correction terms related to frequency from the measured absorption spectrum. The method preferably includes two feedback paths in which the background spectrum used in the analysis is derived from a current background spectrum and previously occurring, co-added background spectra using a weighted average approach. The other feedback path involves using one or more alternative reference spectra should a saturation condition exist.
REFERENCES:
patent: 4128337 (1978-12-01), Zehnpfennig
patent: 5305076 (1994-04-01), Inoue et al.
patent: 5751418 (1998-05-01), Kimura et al.
patent: 5790250 (1998-08-01), Wang et al.
AIL Systems, Incorporated
Turner Samuel A.
LandOfFree
Method and apparatus for on-the-move detection of chemical agent 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 on-the-move detection of chemical agent, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for on-the-move detection of chemical agent will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1463766