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Proceedings Paper

Nondestructive Method For Measuring The Scattering Coefficient Of Bulk Material
Author(s): R. A. J. Groenhuis; J. J. ten Bosch
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Paper Abstract

During demineralization and remineralization of dental enamel its structure changes resulting in a change of the absorption and scattering coefficients of the enamel. By measuring these coefficients during demineralization and remineralization these processes can be monitored in a non-destructive way. For this purpose an experimental arrangement was made: a fibre illuminates a spot on the sample with monochromatic light with a wave-length between 400 nm and 700 nm; a photomultiplier measures the luminance of the light back-scattered by the sample as a function of the distance from the measuring snot to the spot of illumination. In a Monte Carlo-model this luminance is simulated using the same geometry given the scattering and absorption coefficients in a sample. Then the scattering and absorption coefficients in the sample are determined by selecting the theoretical curve fitting the experimental one. Scattering coefficients below 10 mm-1 and absorption coefficients obtained with this method on calibration samples correspond well with those obtained with another method. Scattering coefficients above 10 mm-1 (paper samples) were measured ton low. This perhaps is caused by the anisotropic structure of paper sheets. The method is very suitable to measure the scattering and absorption coefficients of bulk materials.

Paper Details

Date Published: 15 May 1981
PDF: 6 pages
Proc. SPIE 0236, 1980 European Conf on Optical Systems and Applications, (15 May 1981); doi: 10.1117/12.959013
Show Author Affiliations
R. A. J. Groenhuis, Laboratorium voor Materia Technica (The Netherlands)
J. J. ten Bosch, Laboratorium voor Materia Technica (The Netherlands)

Published in SPIE Proceedings Vol. 0236:
1980 European Conf on Optical Systems and Applications
D. J. Kroon, Editor(s)

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