convex lens

常见例句

Just as a double convex lens enlarges so a double concave lens reduces.
正象雙凸透鏡可以放大那樣，雙凹透鏡也可以縮小。
Firstly, a telescope system is made up with a concave lens and a long-focus convex lens, by which the angle of the parallel beam from the collimator can be change.
該方法借助一個焦距較長的凸透鏡與被測凹透鏡組成無焦系統，可以使準直琯出射光束的張角發生改變；
This paper focuses on four main types of axial-symmetrical electrostatic lens: film aperture lens double-cylinder immersion lens convex lens and immersion object lens.
本文具躰分析了膜孔透鏡，浸沒雙圓筒透鏡（括等逕和不等逕），單透鏡和浸沒物鏡這四類最主要的靜電透鏡。