2) laser beam beyond the diffraction limits
超衍射极限激光光束
1.
By use of the inverse transfer algorithm to calculate the phase distribution of an appropriate compensative phase, it is found that the reduction of the divergence of the laser beam beyond the diffraction limits and its power density of the diffraction central spot in the far field after reduction doesn t clearly decrease.
定义了激光光束衍射远场光斑压缩前后的能量比以及能量密度比来衡量超衍射极限激光光束的质量。
3) diffraction
[英][di'frækʃən] [美][dɪ'frækʃən]
光束衍射
1.
Research on the diffraction characteristics of phase modulated laser beams dispersed spectrally;
光谱色散后的相位调制光束衍射特性研究
5) laser diffraction
激光衍射
1.
Simulation research for particle shape measurement with laser diffraction;
激光衍射法测试颗粒形状的模拟
2.
CCD Measuring System for Wire Diameter by Laser Diffraction;
激光衍射 CCD 测径系统
3.
Improvement of the method of laser diffraction measuring light-guiding fiber diameter;
激光衍射测量光导纤维直径方法的改进
6) diffraction beamline
衍射光束线
1.
The general design of a high-resolution diffraction beamline at a third generation X-ray synchrotron radiation source is presented.
介绍了第三代同步辐射高分辨率X射线衍射光束线的总体设计。
补充资料：激光衍射计量技术
激光衍射计量技术
laser diffraction measuring technique
i心uang yonshe iijiong iishu激光衍射计t技术(1~diffiaCtion~ngtec俪que)利用激光衍射条纹的变化精密测量长度、角度、轮廓的一种全场计量方法。 激光衍射计量利用的是激光的远场衍射效应，即夫琅和费衍射。激光照射被测量(如狭缝、圆孔等)后，将产生衍射条纹，如图所示。利用激光衍射系统进行精密测量有两种方法:①记录固定点的衍射强度(如图a中A和B点);②记录衍射条纹极值点之间的距离(如图b中‘)。根据测得的衍射条纹信息，通过衍射公式，可求出被测量值。在实际应用中常用的激光衍射计t技术有:①间隙计量法，主要用于尺寸的比较侧t、工作形状的轮廓测量及应变测量等;②反射衍射法，主要用于表面质量评价、直线性评定、间隙测定等;③分离间隙法，主要用于液体折射率测量、薄膜材料厚激光衍射条纹示意图度及表面涂层厚度的测量等;④互补测量，用于细丝(金属丝、光导纤维及各种合成纤维丝等)或薄片(游丝等)的测量;⑤艾里斑测量，主要用于徽孔直径的测量。激光衍射测量灵敏度高，现已达0.1脚，测t准确度一般小于0.1%，装置简单，操作方便，可实现动态联机测t和全场测量。但其绝对量程比较小，量程范围约为0.01~一1.5~。(刘庆纲)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条