查询词典 laser

A method of producing a three-dimensional image of an object by recording on a photographic plate or film the pattern of interference formed by a split laser beam and then illuminating the pattern either with a laser or with ordinary light.

全息照像术一种再现物体三维空间形象的方法，在底片或版片上记录由分裂的激光光束干扰下的图案，然后再用普通光或感激光显示出该图案

And also is seeking after the effect of laser parameter on ablation efficiency in laser medical.

探索激光参数对气化效率的影响是激光生物医学的重要研究内容。

Ablative laser propulsion is one of the major branches in the study field of laser propulsion.

烧蚀模式激光推进是激光推进技术的一个重要研究领域。

Laser's characteristic as a shock wave drive and the advantages of KrF laser are explained. Finally, the progress at home and abroad is enumerated.In chapter two, the basic principle of the EOS study is introduced. Specially, the impedance mismatch effect of the double-layer flyer is mentioned here. It is the primary theoretical basis of this paper.In chapter three, a one-dimension, three-temperature hydrodynamic code HYADES is introduced briefly. it is used to make a qualitative analysis about how the thickness of ablator affect the flyer velocities and stability.In chapter four, the experimental setup is described.

第一章为绪论部分，简要总结了状态方程研究的历史，激光作为冲击波驱动源的特点和KrF激光的优势，以及国内外的进展情况；第二章是本工作的理论基础，讨论了冲击波物理和雨贡纽曲线测量的基本原理和方法，重点介绍了激光飞片法的特点、关键要素和双层飞片的阻抗失配效应，鉴于KrF激光短波长和长脉宽的特点，我们拟对双层飞片的特性展丌研究工作，为实测状态方程做好准备；第三章简单介绍了一维三温流体力学数值模拟程序Hyades并运用它进行了若干状态方程实验的计算和设计，进行了烧蚀层厚度对飞片速度、稳定性的影响的定性分析；第四章是实验平台描述部分，介绍了光束平滑化技术，靶的制作，条纹相机的原理和使用，系统同步控制以及光学记录速度干涉仪系统的简单原理和构成。

We believe that the improvement of the frequency response is due to a two-mode beat that includes the main mode of the slave laser and the master laser mode, which coincides with the side band of the slave laser.

激光器频率响应的改善可以用两个模式的拍频来解释，一个模式是从激光器的主模，另一个是主激光器的模式，该模式与从激光器的边带重合。

Furthermore, its working characteristics are studied experimentally and compared with those excited by the only DC glow discharge. Under the action of transverse silent discharge, the laser power, the gas-filled pressure and the fraction of N2in the laser are increased obviously, the laser efficiency is increased, too.

实验表明，由于横向无声放电的作用使这种激光器的激光功率、工作气压和工作气体中氮的比例有明显的提高，激光效率也有所提高，而且放电电流能兼顾最大激光输出功率和最佳效率。

the paper discussed the phase laser rangefinder and pulse laser rangefinder principle, and the advantages and disadvantages of two kinds of laser rangefinder made a comparative analysis.

论文中谈论了相位激光测距和脉冲激光测距的原理，并就两种激光测距的优缺点作了对比分析。

Laser Cladding Rapid Forming is a new developed technology on the basis of laser cladding and rapid forming in the recent years. In LCRF the substrate and the metallic powder fed synchronously are melt by laser beam and the metallurgical combination is formed, then the compact part with regular figures is manufactured layer by layer on the substrate. LCRF has some special advantages, such as high integration, high production efficiency, wide range of processable materials, no pollution to the environment and so on.

激光熔覆快速成形技术是近年来在激光熔覆技术和快速成形技术的基础上发展起来的一种新技术，通过激光熔化基体和同步送来的粉末，使粉末和基体形成冶金结合，并且在基体上堆积成有规则形状的致密的零件，具有集成度高、生产效率高、柔性好、可加工材料广泛、不污染环境等优点，因此受到了越来越广泛的关注。

In order to obtain 266nm UV laser, we use a type-I phase match BBO crystal(θ=47.6°) pumped by the green laser above and a focus lens. the spectrum of 266nm UV laser is measured by a UV spectrometer. But we can not obtain the output power for absence of available spectroscopes.

在高功率、高重复频率绿光激光器的基础上，采用I 类相位匹配(θ=47.6°)的BBO 倍频晶体，实验中测得了266nm 激光光谱，但由于缺乏有效的分光措施无法测得输出功率。

After transverse Zeeman effect is introduced to reduce the mode coupling, the laser could produce two orthogonal linear polarized components with 5MHz beat frequency. The effect of the magnetic field's direction to generation of the dualfrequency and the polarization property of the laser is investigated Based on theoretical study and experimental investigation to the beat frequency tuning character, a novel method for stabilizing the laser beat frequency is brought forward.

现代机械工业的发展使得机床、三坐标测量机等的运行速度已提高至1m/s，为适应这种发展趋势，本文研究了高频差（5MHz）激光干涉仪的光源、稳频和外差信号的处理等基本问题，建立了测量速度可达1m/s的高测速激光干涉仪，并对其在加工中心主轴热漂移测量系统和加工中心误差实时测量系统中的应用进行了研究。

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。