反射靶

HIFU聚焦探头声场功率测量的凹锥面反射靶设计分析

Design of concave cone reflector for HIFU ultrasonic transducer power measurement

区别于传统的套孔法和反射靶板法，该方法通过CCD采集激光光斑，用质心法确定光斑中心，根据激光能量密度分布确定激光光斑半径，进而计算出待测的激光束散角。

It ′ s different from traditional methods of covering hole and projecting target sheet . It uses CCD to grasp facula confirms its centre and radius by analyzing distribution of laser energy density and calculate the result .

分别搭建了相位调制型He-Ne激光和半导体激光自混合干涉实验系统，对外反射靶面的微纳米级动态位移进行了重构，获得了纳米量级的微位移重构精度。

Experimentally , He-Ne laser and laser diode SMI system with phase modulation have been set up to reconstruct micro-displacement of the external target and a measurement accuracy of a few nanometers can be obtained .

该装置由电子微量天平、消声水槽和反射靶悬吊系统组成。

It consists of an electronic ultramicrobalance , an anechoic tank and a system of reflecting target .

它由激光防撞雷达、控制报警箱、反射靶和联接电缆组成。

It comprises a laser anti-collision radar , a control-precaution box , a reflecting target and connecting cables .

超声功率标准的反射靶和换能器安装误差对测量精度的影响

Measurement Uncertainty Caused by the Installation Error of the Transducer and Reflecting Target in the Standard Ultrasonic Power Apparatus

主要包括系统设计、关键部分（吸收靶、反射靶）的设计制作、实际测量以及整体的误差分析。

It includes system design , manufacture of key parts ( absorbing target and reflecting target ), actual measurement and error analysis of the whole system .

作者改进了在扫描电镜中使用反射靶面透射样品座获得扫描透射电子象的方法，得到比通常的办法好得多的图象。

The author improved the method obtaining STEM images by using the reflective target specimen stege in SEM , and gained better images than commonly adopted method .

第四章，创新地利用反射靶和吸收靶设计了一套声功率测量装置，对本文设计的压电陶瓷激波发生器的工作性能进行测量和验证；

In the fourth chapter , using reflecting target and absorbing target , we invent a novel ultrasonic power meter in order to exam and certify the piezoelectric shock wave generator .

设计了锥面反射靶和吸收靶相结合的辐射力测量装置，为研究激波发生器的工作性能提供了一种手段。

Integrating the conical reflecting target and the absorbing targe , the testing device of the radiation force was designed , which provides a means to analyze the performance of the shock wave generator .

辐射压力法是超声功率测量中常采用的方法，用辐射压力法测量声功率中对于不同反射靶面的功率与压力之间的换算关系是非常重要的。

In the ultrasound power measurement of ultrasound transducer , the radiation pressure method is often used . To calculate the converting relationship between the ultrasound power and the pressure of interceptor is very important .

应用几何声学方法，推导了聚焦超声作用于测试靶上的辐射力的通用公式，讨论了全反射靶和全吸收靶上的辐射力。

The formulas of radiation force acting on targets in the focused ultrasonic field are derived using ray acoustic method . The radiation forces on the totally reflecting target and on the totally absorbing target are discussed .

文章从能量守恒基础出发，推导了大口径聚焦换能器声场作用于锥面反射靶的功率与压力的换算关系，并将结果应用于凹锥面反射靶计算。

Based on the energy conversation law , it is deduced the converting relationship between ultrasound power and the pressure formed by ultrasound beam from large-aperture focused transducer in this paper . The result is applied to the calculation of concave cone reflector .

黄海海域陆相中生界地震反射特征及靶区优选

Seismic Reflection Characteristics and Selection of Hydrocarbon Prospective Areas in the Terrestrial Mesozoic Strata of the Yellow Sea

这些超热电子发射峰分别沿着激光反射方向、靶法线方向和激光背反射方向。

These emission peaks are located in the directions of the specular reflection of laser , the target normal and the back-reflection of laser respectively .

反射式鱼雷声靶的初步研究&材料和结构

A preliminary research on reflecting topedo target ── Material and structure

同时采用了反射层、组合靶等手段进一步优化系统。

Then , reflecter and combined target are applied to optimize system further .