From the focal distance formula of thin lens, the convergence and divergence nature of each kind of thin lens are discussed in different media.
从薄透镜的焦距公式出发,讨论了各种透镜在不同介质中的会聚与发散性质。
2
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 convergencelens.
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。
3
This paper comparably tests different LED light source and optical convergence system, analyzes the condensing performance and designs the structure of TIR lens.