布の透明性と光学的パラメータとの関係

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Visual acuity was measured by Randolt's ring-figures covered or uncovered with a fabric and the degree of transparency for the fabric was defined as the ratio of the visual acuity in the covered case to that in the uncovered case. The feeling of transparency of fabrics was determined through sensory evaluation with the sight sense. As the optical parameters of fabrics, the absorption coefficient and the diffusion coefficient used in the Kubelka-Munk model were experimentally measured by the application of Minato's method. Then the relationship of those characteristics for the transparency of fabrics, namely, the degree of transparency, the feeling of transparency and the two optical parameters, was discussed. Obtained results were as follows. The feeling of transparency was very high as the degree of transparency was above 0.8 and the feeling of transparency was sufficiently low, as the degree of transparency was below 0.4 Both characteristics proportionally changed to each other in the range of 0.4 to 0.8. The degree of transparency showed a good linear relation with the transmission coefficient calculated by using the Kubelka-Munk model, where the absorption and diffusion coefficients were experimentally determined for the fabrics. Also it is interesting to note that the degree of transparency was mainly dependent on the diffusion coefficient and showed a good correlation coefficient in terms of fabric thickness.
社団法人日本家政学会の論文
2001-10-15

布の透明性と光学的パラメータとの関係

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