1·It's an easy matter to observe chromatic aberrations, with a thick, simple converging lens.
用一厚的简单会聚透镜很容易观察色差。
2·A refractive defect of a lens or other optical system that prevents light rays from converging at a single point resulting in a blurred or imperfect image.
散光有折射缺陷的透镜或其它光学系统，阻碍光线汇聚于一个焦点，形成一个模糊或不完全的图象。
3·At least one aspherical lens is arranged between the spherical lens and the printing form, for focusing or converging the laser light onto a desired spot.
至少有一个非球面透镜位于球面透镜和印刷版面之间，用于将激光聚焦或会聚到一个所需点上。
4·This paper presents the features of a lens designed for converging the laser beam onto the target and the solution of the aspherical lenses using equal optical path principle.
本文介绍了激光打靶透镜的特点及用等光程原理求解非球面透镜的方法。