通过透镜

Generally, the Fresenl lens is used for collimation and its structure is planeconvex, but the analysis and comparison of the biconvex and the plane-convex Fresenl lenses with P-W method show that the biconvex Fresenl lens is better because of its specific imaging requirement. The two kinds of the Fresenl lenses were modeled in ZEMAX to validate the conclusion.

从应用角度看，菲涅尔透镜设计属于准直系统，一般采用平面结构，但由于其成像要求的特殊性，通过运用P-W方法进行分析和比较，结果表明：曲面的设计较之于平面更具优势，并在ZEMAX中分别对2种菲涅尔透镜进行建模，验证了结果的正确性。

To make picture clear, the electron beam that must come out to be being hit from electron gun undertakes focusing is handled, let electron beam pass electron lens, be opposite with optical lens of beam of light collect action likeness, the electron beam assemble that opens scattering rises, get on fluorescent screen one shines again small spot, add the effect of scanning circuit, ability shows clear picture.

为了使图像清楚，必须对从电子枪打出来的电子束进行聚焦处理，让电子束通过电子透镜，和光学透镜对光束的聚集功能相似，把散射开的电子束会聚起来，在荧光屏上得到一个又亮又小的光点，加上扫描电路的功能，才能显示清楚的图像。

By using Zernike polynomials to describe the wavefront distortion of beams, the propagation properties of the flattened Gaussian beams, super Gaussian beams, Gaussian beams and plane waves passing through an aberrated lens or an aberrated annular lens are studied based on the generalized Huygens-Fresnel diffraction integral.

以广义惠更斯—菲涅尔衍射理论为基础，采用Zernike多项式描述像差光束畸变波前相位，研究了平顶高斯光束、超高斯光束、高斯光束以及平面波通过像差透镜和环状像差透镜的传输。

The linewidth error of 16-step Fresnel lens is measured and its effect on 16-step Fresnel lens is analyzed.

通过实验测量16阶菲涅耳透镜的线宽误差，分析其对16阶菲涅耳透镜衍射效率的影响。

In the first part, a novel paraboloidal lensed multimode fiber has been analyzed amply in the coupling between the high power single emitter broad area diode laser and multimode fiber, which has been verified in the experiment. In the second part, the coupling between the high power single emitter broad area diode laser and cylindrical lensed multimode fiber has been discussed detailedly.

主要通过计算机仿真抛物面型光纤微透镜和柱状楔形光纤微透镜与大功率宽发射域半导体激光器的多模光纤耦合效率，并在实验中进行验证，提出了提高大功率宽发射域半导体激光器与多模光纤耦合效率的新方法。

Based on the Seidel sums formulae of thin lens, four types of NIM thin lenses free from partial primary aberrations are designed with specific parameters and given redundant aberration coefficients.

通过对单块负折射率介质薄透镜的像差特性分析，我们提出了四种只有利用到负折射率介质才具备的可消除部分初级像差的单块薄透镜系统，并给出了相关的系统结构参数和冗余的初级像差表达式。

The key for the optical design is confirming the F number of lens,and making the system aberration least by transforming the curvature of lens and the degree of lens tilt in the case of no ghost image damager.

设计的关键在于确定例行的透镜F数。并通过控制透镜的曲率半径和倾斜角度，在保证无鬼点破坏的情况下使得系统像差较小。

According to these formulas,the parameters of the lenticular lens for a 15-inch autostereoscopic display monitor was designed.

根据这些理论公式，为15英寸柱面透镜光栅自由立体显示器设计了柱面透镜光栅的参量，通过应用光学软件ASAP模拟该立体显示器的立体视区分布，得出该立体显示器能显示良好立体图像，从而验证了理论的正确性。

The concentration of mass is determined by analyzing the effect of so-called gravitational lensing, where light from the distant objects is distorted by intervening matter.

通过所谓的引力透镜分析了大规模的的物质集中区。在引力透镜这块区域内，来自遥远天体的光线在这被扭曲。

In a camera, light rays pass through a series of lenses that focus images onto film.In a healthy eye, light rays pass through the cornea and lens, which focuses images onto the retina, a layer of light-sensing cells lining the back of the eye.

在照相机中，光线经过一系列的透镜，把图像聚焦在胶片上，在健康的眼睛中，光线通过角膜和透镜，把图像聚焦到视网膜上，而视网膜是一层排列在眼底的光敏单元。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。