光束扩束器：以兩片凸透镜(convex lenses)作为光束扩束器，本实验 使用焦距分别为 50 mm、125 mm 作为光束扩束器，兩镜的间距为 175 mm，光束扩大了 2.5 倍。
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hyperbolic plano-convex lenses 双曲平凸透镜
Fused Silica Plano-Convex Lenses 熔融石英平
Plano-Convex Lenses 平凸透镜
Bi-Convex Singlet Lenses 双凸球面透镜
piano-convex rod lenses 平凸棒透镜
同义词： converging lens
以上来源于: WordNet
The compound microscope consists of two convex lenses with short focal length, the objective and eyepiece lenses, fitted at opposite ends of a tube.
复合显微镜包括两个短焦距凸透镜，即位于镜筒两端的物镜和目镜。
They're lenses because they're convex vessels, and when they're full of water, they act as a lens and you see the horizon in them, upside down and backwards.
它们是透镜，因为它们是凸面容器，当它们盛满水后，它们可作为透镜使用，你可以看到它们里面上下颠倒的地平线。
They're lenses because they're convex vessels, and when they're full of water they act as a lens and you see the horizon in them, upside down and backwards.
说它们是镜头，因为它们是凸面的容器。盛满水后，它们可作为镜头使用，你可以通过它们看到颠倒过来的地平线。
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