| 释义 |
reflection density
reflection density n (General Physics) physics a measure of the extent to which a surface reflects light or other electromagnetic radiation, equal to the logarithm to base ten of the reciprocal of the reflectance. Symbol: D Former name: optical density
reflection density
reflection density[ri′flek·shən ‚den·səd·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 measurement is perpendicular to the surface. MedicalSeeoptical density |