convex lens

常見(jiàn)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(gè)焦距較長(zhǎng)的凸透鏡與被測(cè)凹透鏡組成無(wú)焦系統(tǒng)，可以使準(zhǔn)直管出射光束的張角發(fā)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.
本文具體分析了膜孔透鏡，浸沒(méi)雙圓筒透鏡（括等徑和不等徑），單透鏡和浸沒(méi)物鏡這四類(lèi)最主要的靜電透鏡。