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目镜是各种光学观察仪器中不可缺少的组成部分.它的作用是把物镜给出的像成在人眼的远点,使观察者网膜上出现一个放大的像. 随着仪器的使用条件不同,目镜的种类很多,本文仅就普通显微镜系统中经常使用的最简单的惠更斯目镜和冉斯登目镜加以讨论. 惠更斯目镜及冉斯登目镜都是复合透镜
Eyepieces are indispensable components of various optical observation instruments, and their purpose is to make the image given by the objective into a far point in the human eye, causing an enlarged image of the retina of the observer. As the instrument is used Different types of eyepieces are numerous and this article discusses only the simplest Huygens eyepieces and the Ramsden eyepieces that are commonly used in ordinary microscope systems.Wygthens and Ransom eyepieces are all composite lenses