Analytical sensor using grating light reflection spectroscopy

Details Analytical sensor using grating light reflection spectroscopy Analytical sensor using grating light reflection spectroscopy

1995-11-01

1997-03-11

Evans, F. L.

Optics: measuring and testing

Refraction testing

G01N 2141

Patent

active

056107080

ABSTRACT:
A optical analytical method and apparatus for measuring concentrations of materials in liquids and gases is described. The method is based upon measurements of light reflection from diffraction gratings in contact with the sample. Features in the reflection spectrum are directly related to the complex dielectric constant of the sample solution. By examining the reflection spectrum, the concentration of materials in the liquid or gas can be determined.

REFERENCES:
patent: 3702736 (1972-11-01), Coggeshall
patent: 4436420 (1984-03-01), Depp et al.
patent: 4715715 (1987-12-01), Howarth et al.
patent: 5502560 (1996-03-01), Anderson et al.

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