Method and device for investigation of a surface layer

Details Method and device for investigation of a surface layer Method and device for investigation of a surface layer

2004-11-02

2011-11-29

Gakh, Yelena G (Department: 1777)

Chemistry: analytical and immunological testing

Optical result

C436S167000, C436S170000

Reexamination Certificate

active

08067244

ABSTRACT:
A method and device for investigation of a surface layer of a material. The material without surface layer is exposed for a gas and the penetration of the gas into the material is measured. Then the surface layer is applied to the material. Finally, the material including the surface layer is exposed for the gas and the penetration of the gas into the material through the surface layer is measured. The measurement of the passage of the gas into the material is performed by a method comprising measurement of light absorption by the gas by absorption spectroscopy.

REFERENCES:
M. Sjoholm, Analysis of Gas Dispersed in Scattering Media, Optics Letters, Jan. 1, 2001, vol. 26, No. 1, pp. 16-18,, Lund, Sweden.
Joachim Seltman, Indication of slope-grain and biodegradation in wood with electromagnetic waves, Seminar on Scanning Technology and Image . . . ,Sep. 1, 1992, Stockholm, Sweden.

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