Optics: measuring and testing – Of light reflection – With diffusion
Patent
1985-06-24
1987-12-29
Rosenberger, R. A.
Optics: measuring and testing
Of light reflection
With diffusion
356429, G01N 2147
Patent
active
047157186
ABSTRACT:
A method and apparatus for the on-line determination of the bonding strength of a plural layer laminate having at least one outer layer transparent to electromagnetic radiation, said method comprising: directing a collimated beam of electromagnetic radiation onto the substantially flat surface of said laminate at an incident angle substantially greater than a normal to the surface of said laminate; measuring the reflected intensity of said electromagnetic radiation at two substantially different diffuse reflectance angles; converting said reflected intensity to an intensity ratio by dividing the greater intensity value by the lesser intensity value to obtain a value which is proportional to the adhesion of the laminate based upon a pre-determined relationship of the bonding strength of said laminate and the value of said intensity ratio.
REFERENCES:
patent: 2947212 (1960-08-01), Woods
patent: 3693025 (1972-09-01), Brunton
patent: 3832065 (1974-08-01), Sullivan et al.
patent: 4015127 (1977-03-01), Sharkins
patent: 4172666 (1979-10-01), Clark
patent: 4583861 (1986-04-01), Yamaji et al.
Pierce Andrew E.
Rosenberger R. A.
Stevens Timothy S.
The Dow Chemical Company
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