一般人可能都见过放大镜,没见过放大镜也见过眼镜或照相机之类的东西,一般光学仪器或设备中都会用到透镜。透镜有一个最基本的性质,就是有焦点(曲面镜也有焦点),可以汇聚或发散光线,从而实现聚焦。只要能聚焦就可以成像,这是很有用处的。用普通光学透镜做成镜头,我们可以 Most people may have seen a magnifying glass, louboutin pas cher, have not seen a magnifying glass has seen glasses or cameras and the like, the general optical instruments or equipment will use the lens. One of the most basic properties of a lens is the focus (the curved mirror also has focus) that can focus or diverge light to achieve focus. It is useful to focus as long as it can be imaged. With ordinary optical lens made of the lens, we can