一、前言感光材料的特性曲线表征了感光材料曝光显影后影像的光学密度与曝光量(或曝光量对数)之间的关系。它虽然已有将近一百年的历史,至今仍是感光科学中最基本的曲线。由它可以推算出感光材料的许多特性,而这些特性对于选择感光材料、正确使 I. Introduction The characteristic curve of the photosensitive material characterizes the relationship between the optical density and the exposure (or the logarithm of the exposure) of the image after the exposure of the photosensitive material. Although it has been nearly a hundred years old, it is still the most basic curve in photographic science. It can be deduced from many of the characteristics of photosensitive materials, and these characteristics for the choice of photosensitive materials, the correct