光束

In chapter 2, the intensity and phase formulae of five photorefractive processes in intermediate regime are derived including the analytic expressions of codirectional parallel-or cross-polarization two-wave mixing in the depleted pump condition and the analytic expressions of contradirectional parallel-or cross-polarization two-wave mixing and degenerate four-wave mixing in the undepleted pump approximation.

给出了本文的结构和取得的主要结果。第二章推出了五种光折变过程的中间段强度与相位公式。既同向平行、交叉极化双光束耦合的大信号解析公式，异向平行、交叉极化双光束耦合以及简并四波混频的小信号解析公式。

This system effectively combines several individual laser beams coherently into a single beam in phase.

这个系统有效地将几个独立的激光光束连贯地整合成一个单一激光光束。

As scale graduation pattern is used a steel tape with 200 μm grating pitch.The light from an infrared LED with a small light emitting surface is columnated parallel by a condenser lens and directed through the scanning reticle to the scale.

由红外发光二极管发出的一束光截面很小的红外光通过透镜后形成平行光束，该平行光束通过扫描窗照射到光栅尺上。

The characteristics of the dual-rod resonator have been studied theoretically and experimently.

将激光混合模理论引入模式测量中，使系统软件能够给出和评价混合模的光束参数及光束质量。

Focused Eyebeam: Two beams, one from each of Kologarn's eyes, appear to the right

集中眼睛光束：两道光束，每一道都是从科罗加恩的眼睛射出，分别会出现在目标的左方跟

In this gorgeous color image, both Horsehead and NGC 2023 seem to be caught in beams of light shining from above -- but the beams are actually just internal reflections from bright star Sigma Orionis, just off the upper edge of the view.

在这幅壮丽的彩色影像里，马头星云和NGC 2023好像都沐浴在来自上方的光束里；事实这二道光束是亮星所造成的相机内部反射，这颗亮星是参宿增一，位在图像的右上端外面。

Based on the Collins integral formula, the propagation of generalized hypergeometric beams in paraxial ABCD optical systems is studied and the analytical expressions for complex amplitude at output plane are obtained.

利用柯林积分公式研究了广义超几何光束在ABCD近轴光学系统中的传播行为，得到了光束在输出平面复振幅的解析表达式。

Laser cutting revearsing, passing over a condenser in revearsing, hyperpyretic light energy action focused Board above the combustion, the wooden planks and boards into sowdust and evaportranspiration; beampropagation the ashes in line with the three kilograms of compressed air blowing in the same direction, combustion, evaportranspiration sowdust of the f * ck you do cut blown away.

激光切割木板时，光束经一聚光镜在木板上方聚焦，高热光能作用在木板上方，将木板燃烧、蒸散成木屑和灰烬；光束配合三公斤同方向的压缩空气吹气，将燃烧、蒸散的木屑灰烬吹走即可达到切割的目的。

In the process of the evaluation we got the mathematical relation between correlative parameter β, Interceptive parameter δ, and the factor M~2, using coherent beam passing diaphragm, with a numerical calculation and diagram by MATLAB.

在估算与评价过程中，利用了部分相干光通过硬边光阑的理论模型估算M~2因子，得出了光束的相干参量β和光束截断参量δ与M~2因子的具体关系式，并利用MATLAB对其进行数值计算，最后图示出它们之间的关系。

In receiving antenna, when a cone-channel condenser is located at the exit pupil of a Keplerian telescope, proper field of view is obtained without tracking system at the receive end, because the receiving optical power of APD will keep stable to a great extent when the incident beam deflects.

发射天线包括准直镜和扩束镜两部分，出射光束发散角压缩到1mrad；接收天线采用非成像光学设计，将接收光锥置于望远系统的出瞳位置，保证了大视场光束的准确接收，从而提高了系统抗干扰能力。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐