反差系数

在感光测定中，一般都用图解的方法从感光特性曲线上求出感光度、反差系数和灰雾密度等特性数值。

In sensitometry , the sensitivity , contrast coefficient and fog density are generally deduced from characteristic curve graphically .

本文论述了反差、反差系数的基本含义，分析了图片翻拍复制中影响反差的因素，介绍了如何有效地控制反差以获得良好效果复制品的做法。

The article describes the meaning of contrast and contrast coefficient , analyses the factors influencing contrast in photograph reproducing , and introduces some ways how to control the contrast of photograph reproduction .

已经做到写擦循环次数超过1000次，反差系数K大于50%，因此能用于制备可录音和擦除的激光唱片，改变市售激光唱机只能单放的局面。

A number of write-erase cycle N > 1000 with a coefficient of contrast K > 50 has been realized . Hence the film is suitable for manufacturing recordable and erasable compact discs while the commercially available CD-set is only a player .

究其原因主要有历史遗留原因、财政扶持力度不足以及工农业发展反差系数大造成的。

The reasons mainly are historical reasons , financial support and the contrast coeffic (?) ent by the intensity of different industrial and agricultural development .

影响印片颗粒指数值的两个主要因素是彩色相纸的反差修正系数a和彩色负片的覆盖力系数ECP；

The two main factors affecting print grain index accuracy are contrast amendment factor a of the color paper and cover power efficiency E CP of the color film .