| 1. | The principal points of a thin lens coincide at the center of the lens .
薄透镜的两个主点与透镜中心相重合。 |
| 2. | In this same way we could compute the response of any number of thin lenses .
用同样的方法，我们能够求出任意数目的薄透镜的响应。 |
| 3. | On the determination of errors in thin lens ' focal distance
对测定薄透镜焦距误差的探讨 |
| 4. | A method of solving the initial structure of a three - thin - lens null corrector
无光焦度3贴合薄透镜组初始结构参数求解方法探讨 |
| 5. | 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 |
| 6. | Triplet thin lens
三合薄透镜 |
| 7. | 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。 |
| 8. | 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。 |
| 9. | When a collimated - well gaussian laser beam passes through a 27i - phase plate and then focused by a lens , a focused hollow beam ( fhb ) will be generated behind the lens , as a result of the completely ( r = 0 ) and partially ( r 0 ) destructive interference effects around the central region of the beam
当一束准直的高斯光束通过具有2位相分布的位相片和一个薄透镜时，这将导致在入射高斯光束中心的完全和部分相消干涉效应，于是在透镜后就会形成一束聚焦中空光束( fhb ) 。 |
