1、 The annular lens field vertical illumination system has been more and more applied in special microscopes.
环形透镜暗场落射照明系统越来越多被应用在特型显微镜上.
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2、 Most of us are familiar with positive - index lenses - in cameras, magnifying glasses, microscopes and telescopes.
大多数人熟悉的是具有正折射率的透镜,常见于照相机 、 大镜 、 微镜及望远镜之中.
来源:互联网