focal distance meaning in English

[length] 【物理学】焦距。

On the determination of errors in thin lens ' focal distance
对测定薄透镜焦距误差的探讨
Correct under the guiding of route , we successfully design and have trial - produced the one kind of new long large - scale camera of focal distance
在正确路线的指引下，我们成功地设计和试制了一种新型长焦距大型照相机。
In this paper , the focal distance formula of lens in varied shapes is obtained by using object methods to make its physical meaning more obvious
摘要采用直观的方法得出了空气中各种形状的薄透镜的焦距公式，使其物理意义更加明显。
Abstract : it is proved that a small circular aperture has the positive and minus focal distances , and the research experiments for small aperture glasses are introduced concisely
文摘:提出了证明小圆孔具有正、负焦距的一种方法，简要地介绍了关于小孔眼镜的实验研究
Abstract : the rules of ganssian light beams extended by lens are disscussed firstey , and the relation between the optimum waist extended and focal distance of the lens are found out
文摘:首次讨论了用透镜来扩展高斯光束的一般规律，找出了最佳扩展束腰与透镜焦距的关系

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