“reflection density”的概念、定义、翻译、参考文献-科学参考

单词	reflection density
释义	reflection density [ri`flek·shǝn ´den·sǝd·ē] ^OPTICS The common logarithm of the ratio of the luminance of a nonabsorbing perfect diffuser to that of the surface under consideration, when both are illuminated at an angle of 45° to the normal and the direction of measure ment is perpendicular to the surface.
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