The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 1999
Filed:
Nov. 04, 1997
Applicant:
Inventors:
Donald J Dahm, Ludlow, MA (US);
Kevin D Dahm, Somerville, MA (US);
Assignee:
Foss NIRSytems, Inc., Silver Spring, MD (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356 72 ; 356 73 ; 356381 ; 356432 ; 356357 ;
Abstract
In a method and apparatus for analyzing an unknown material, the spectra of absorption and remission coefficients are determined by means of equations relating to remission, absorption and transmission fractions through layers of material of different thicknesses in accordance with a discontinuum theory. To determine the concentration of an absorber in an unknown material, the absorption coefficients are determined for the unknown material and for samples of known material. The concentrations of absorbers in the unknown material are determined from the absorption coefficients by regression analysis.