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In order to design a high performance laser Doppler velocimeter, the relationship between the signal intensity of laser Doppler and the diameter of spot was analyzed using the speckle theory, and the calculation formulas of the Doppler current was given based on functional theory. The polarization characteristic of scattered light and its intensity distribution were investigated.

为了设计高性能的激光多普勒测速仪，运用散斑理论详细分析了激光多普勒信号的强度与散射光斑大小的关系，结合泛函理论给出了计算多普勒电流的散斑表达式，并通过实验的方法研究了回波信号的偏振特性及其强度分布。

In the control system for skin pass mill elongation,the measuring devices in common use are pulse generator and laser velocimeter ,of which the control accuracy of the laser velocimeter is higher.

在平整机延伸率控制系统中，常用的测量装置是脉冲发生器和激光测速仪。

In order to decrease the measuring error of signal processing in laser Doppler velocimeter,frequency spectrum correction methods for laser Doppler signal were proposed.

在激光多普勒测速仪中，为了减小由信号处理算法带来的测量误差，提出运用频谱校正算法对多普勒信号的频谱进行校正，详细阐述了能量重心法、比值法和相位差法3种离散频谱校正算法的基本原理，运用这3种算法对理想正弦信号进行仿真，并运用比值法对信号施加不同频率和信噪比的噪音下的正弦信号和实测的多普勒信号进行仿真及实验研究。

ABSTRACT In this dissertation, in accordance with two projects from the National Defense Science Industry Committee:"The Laser Doppler Velometer for the Large-value and Wide-frequency-range Standard Negative-step-force"And"The novel kind Laser Vibrometer for vibration transducers calibration"have been studied deeply and systematically.

结合国防科工委85攻关项目："用于大力值宽频带标准力源发生装置中的激光多普勒测速系统"和国防攻关项目："用于加速度传感器复合灵敏度绝对校准的宽频带相位型激光测振仪"的研制。

The present numerical results indicate that:(1) the ablation shape and depth sensitively depend on the laser shape, pulse duration time and power density;(2) with laser power density in order of 109 W/cm2, ablation surface keep in consistent with spot size.

数值结果表明：(1)激光的脉冲形状、脉宽和功率密度直接影响烧蚀的形状和深度；(2)激光功率密度在109 W/cm2量级烧蚀面近似为光斑大小。

The study of absorption property of water vapor is valuable for laser communication and transmission of laser.

水汽吸收特性的研究对评估激光通讯和激光传输等具有重要的意义，因此水汽吸收光谱的研究在理论和工程方面都有重要应用。

The laser diode and the chip of the laser diode driver and the 4∶1 multiplexer,which are realized in different materials and processes,are fabricated on one same ceramic substrate using a film circuit to make up one opto-electronic integrated circuit,i.e.,an OEIC.The chip and the diode are realized with a 0.35μm CMOS process and with wet etching,polymer planar, and lift-off technologies, respectively.The module is encapsulated with a wing shell.

该发射机采用薄膜电路和激光焊接耦合技术将高速集成电路和光电子器件进行混合集成，其中高速集成电路是采用0.35μm硅CMOS工艺实现的单片4∶1复接器加激光驱动器芯片，光电子器件是采用湿法腐蚀、聚合物平坦和lift-off等技术实现的激光器芯片，最终混合集成模块采用蝶形管壳进行封装，体积小、性能优良。

FOG is one kind of laser gyroscopes. IT is based on the interferential theory of Sagnac. And its lamp-house is used with laser. A photic loop is made by fiber. There are clockwise and withershins sheaveses of lights transfer in the circle. With the turn of the circle ,the two lights introduce phasic difference ,so the angle velocity is measured.

光纤陀螺仪是激光陀螺的一种，它采用的是Sagnac干涉原理，以激光作为光源，用光纤构成环形光路并检测出由正反时针沿光纤传输的两束光，随光纤环转动而产生的两路激光束之间的相位差，由此计算出旋转的角速度。

In dual-frequency laser interference measuring system Wollaston prism is an indispensable and important device,which can separate the incident beam in to measurement beam and reference beam according to the polarization direction of dual-frequency laser,so as to realize the high accuracy measurement.

在双频激光干涉测量系统中，Wollaston棱镜是不可缺少的重要光学元件，它可将双频激光按偏振方向分为测量光和参考光，从而实现高精度测量；但是，如果Wollaston棱镜的安装方位相对入射光线方向以及与聚焦透镜距离不同时，测量结果将会不同。

This type design is compact, the area is small, uses inspires the mirror system and the import high speed seals to the type CO2 laser generator, the coordinate high quality stable laser power source, hits the sign precision to be high, the speed is quick, the stable property, can in each kind of Asian gram force, the quartz, the cotton material, the leather, the woodware, the shell, the agate, the marble and so in the nonmetallic material hit sign each kind of design, the character, the writing as well as the punch and so on, is a section of performance-to-price ratio extremely high hits the sign equipment.

该机型设计紧凑，占地面积小，采用高速振镜系统和进口封离式CO2激光发生器，配合优质稳定的激光电源，打标精度高，速度快，性能稳定，能在各种亚克力、水晶、布料、皮革、木制品、贝壳、玛瑙、大理石等非金属材料上打标各种图案、人物、文字以及打孔等，是一款性价比极高的打标设备。

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。