concave lens

汉语翻译

英语解释：

名词 concave lens:

1. a lens such that a parallel beam of light passing through it is caused to diverge or spread out
   同义词：diverging lens

例句：

1. Just as a double convex lens enlarges, so a double concave lens reduces.
   正象双凸透镜可以放大那样，双凹透镜也可以缩小。