convex lens

汉语翻译

英语解释：

名词 convex lens:

1. lens such that a beam of light passing through it is brought to a point or focus
   同义词：converging 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。