透镜焦距 meaning in English
focal length of lens
lens focal length
Examples
- On the determination of errors in thin lens ' focal distance
对测定薄透镜焦距误差的探讨 - Focal length markings of lenses
摄影透镜焦距标志 - How to find the position of the image in the experiment of measuring the foci of thin covex
测薄透镜焦距实验中成象位置的确定方法 - 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 - When a larger waist w of the incident gaussian beam and a shorter focal length / of the lens are chosen , we can obtain an extremely - small dark spot size of the focused hollow beam , even approach the diffraction limit
当选择较大的入射准直高斯光束的束腰w _ 0和较短的薄透镜焦距f时，可以在焦平面上产生一个很小的dss (或束半径r _ 0 ) ，甚至可以接近衍射极限。