从视觉角度讨论夜晚天空光污染评价指标

Discussion of Night Sky Light Pollution Evaluation Index from the Visual Angle

本文讨论了光污染中光对于夜晚天空的污染评价指标。夜晚星空一般用星等来评价观看的程度,主要是依据相对亮度来定义的。视觉角度的评价指标稍微有些不同,主要是亮度和对比度,而和星等之间是可以转换的。亮度、对比度是其它光污染研究中的通用指标,能够将夜晚天空光污染采用视觉指标表示,对于光污染的整体研究是有益的。

Light pollution evaluation index in the night sky was discussed. Magnitude defined by relative luminance,is generally used to evaluate the extent of watching the night sky. The evaluation index from the visual angle are mainly luminance and contrast,and can be converted with magnitude. Luminace and contrast are the common index in the light plllution research,expressing light pollution using visual index,which is beneficial to the light pollution research.