借助参数已知的附加透镜也能得到光束的M2和任意轴向位置的光束横向尺寸。

We can also obtain M2 and spatial variance at other axial positions with the help of additive lenses.

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可选择地或附加地，在该液体透镜中使用的至少其中一种液体可以包含纳米级颗粒。

Alternatively or additionally, at least one of the liquids used in the liquid lens can include nanoscale particles.

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虽然在图4b中示出了两个透镜，但应了解可只使用一个透镜或附加的透镜。

While two lenses are illustrated in FIG. 4b, it should be understood that only one lens or additional lenses may be used.

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