会聚透镜使光线会聚于一点，即焦点。
A convex lens causes rays to converge on a single point, the focal point.
会聚透镜使光线会聚于一点，即焦点。
用一厚的简单会聚透镜很容易观察色差。
It's an easy matter to observe chromatic aberrations, with a thick, simple converging lens.
由数个照明单元加上会聚透镜则构成一个基本的照明系统。
Several such lighting units make a basic lighting system of projector.
用来观察物体细节的简单目视光学器件，是焦距比眼的明视距离小得多的会聚透镜。
Used to observe the details of a simple visual objects, optical devices, is the focal length than the distance between eyes, as much out of the convergence lens.
为适应该项研究的需要，设计了会聚透镜与光纤耦合器的距离可以精确调节的耦合系统。
In this paper we report a laser fiber couple system, by which the output power from the fiber tip can be adjusted according to the requirement of the actual investigation.
对近年来大屏幕彩色显像管电子枪专有技术进行了讨论，系统分析了电子束形成区、主透镜、会聚透镜系统及动态聚焦方式等。
In this paper, the specialized techniques of electron gun for large screen CPTs are discussed. The beam forming region, main lens, convergence lens system and dynamic focusing method are analyzed.
对近年来大屏幕彩色显像管电子枪专有技术进行了讨论，系统分析了电子束形成区、主透镜、会聚透镜系统及动态聚焦方式等。
In this paper, the specialized techniques of electron gun for large screen CPTs are discussed. The beam forming region, main lens, convergence lens system and dynamic focusing method are analyzed.
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