两个焦距都是10厘米的透镜形成的组合透镜焦距为5厘米。
Two lenses of focal length 10 cm have a combined focal length of 5 cm.
描述了对长焦距布拉格-菲涅耳透镜与可变曲率半径反射镜组合所做的实验研究。
An experimental investigation of the combination of a long focal distance Bragg-Fresnel lens with a bimorph mirror is described.
本文介绍了由不同焦距与不同衍射方向的全息透镜组合而成的一种新型全息元件。
A new holographic optical element (HOE) consisting of the hololenses with different focal length and diffraotional channel is described.
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