查询词典 laser

Based on symmetry of the circular light spot of the laser, a two dimensional numerical simulation of temperature fields of laser molten pool has been developed.

利用激光圆形光斑对称性的特点，建立了激光表面快速熔凝条件下温度场的二维数值模型。

In the experiments, the optical output power of the master laser is injected into the slave laser via a circulator.

实验中通过一个环形器，将主激光器的输出光注入到从激光器。

Laser clad of high temperature alloys is a new concept in the laser cladding processes.

高温合金的激光熔覆则是激光熔覆技术中的一个新课题。

Compared with the other laser testing device, here we use laser with special wavelength; a collimate large beam was used to measure the large area, so the data can reflect the relation of the transmission and content of ointment for the whole plaster.

本方法的特色在于特殊选定波长的激光发射器，而采用光学准直扩束器的目的是可以大面积测量，以反映出整块膏药的含膏量和透过率的关系。

A transmitting antenna with tapered fiber is proposed to transform the divergence partially coherent light formed by multi-mode fiber to collimate light. This structure can produce a partially coherent light of low divergence and guarantee the output power of laser transfers completely. It is applicable to laser communication in atmosphere.

提出采用直锥形光纤作为大气激光通信的发射天线，将多模光纤输出的部分相干发散光束变换为准平行光束的方案，既能得到发散角很小的部分相干激光光束，又能保证激光器输出能量的完全传输。

Among this technique, we use a simple, economical and practical collimation method-single lens collimation method to collimate semiconductor laser beam, and use moving objective scanning method to make laser point scan on the lofting plane.

其中用单透镜准直法对有大发散角的半导体激光光束成功地实现了准直，既简单又经济实用；用平移物镜法实现了激光点的扫描。

But the accuracy of laser collimator is hard to increase for the influenceto laser beam in the atmosphere.

但激光束在大气中的准直还是受很多因素的影响而使得激光准直仪的精度难以提高。

The principle of portable laser collimator is introduced in this paper and its laser device,PSD signal processing circuits data acquisition are analysed in detail.

本文介绍了便携式激光准直仪的工作原理，分析了激光器、PSD信号调理电路及数据采集处理系统的设计。

A lens and a paraboloid nozzle were used to focus pulsed CO2 laser and generate impulse.Effects of single pulse energy on impulse coupling coefficient was studied with a high-accuracy compound pendulum and a light figure system.Extension range of pulse energy from 5 J to 70 J was obtained through adjusting working voltage of the laser and energy attenuation of silicon combinations in the experiment.

利用透镜聚焦，抛物面喷管约束，结合复摆和光指针测量系统研究了单脉冲能量对吸气式激光推进冲量耦合系数的影响，实验中通过调节激光器工作电压和硅片衰减实现了脉冲能量5-70 J范围的有效拓展；进一步采用纳秒分幅高速相机拍摄了24 J能量下的流场纹影照片。

An approach is proposed, which emphasizes the importance of concave lens which can scatter the laser and make it an ideal signal source to be captured by the CCD lens. Thus, the measurement would be more precise, taking full advantage of the laser.

本文提出以凹透镜散射法将待测光源转化为镜头可以直接捕捉的理想光源，从而大大提高了点的测量精度，充分利用了激光作为信号源所体现的优势。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。