quarter wave meaning in English
四分之一波长
Examples
- Quarter wave plate
四分之一波片 - Quarter wave line
四分之一波线 - The quarter wave vertical antenna is usually the simplest to construct and erect although i know a great many people who would dispute that statement
四分之一波浪垂直的天线四分之一波浪垂直的天线通常最简单修建和架设虽然我知道伟大会争执那个声明的许多人。 - Through measuring the thickness of mica plates and the wavelengths at which they act as quarter wave phase retarders , the birefringence can be obtained in terms of the function relation between the phase delay , the wavelength and the thickness
通过测量云母材料的厚度和相应厚度情况下作为/ 4波片使用所对应的波长，利用相位延迟与波长及厚度函数关系式直接求得云母的双折射率。 - Biology , etc . owing to many merits has not yet been used to measure parameters of gratings . the paper researches on the subject in view of current lack of it . the main tasks of the paper include : analyzing ellipsometric characteristics of gratings in detail with vector diffraction theory and ellipsometrics ; devising a reflective quarter wave plate at normal incidence according to some ellipsometric characteristics ; making use of normal simplex algorithm during ellipsometric inversion of gratings parameters , inversing ellipsometric parameters with gaussian noise of different standard deviations to simulate actually measured values with examples of isotropic metallic and anisotropic step gratings and testing that ellipsometry about gratings parameters is feasible with the range of certain precision ; discussing choice of incidence angle at length
本论文的主要工作包括：结合光栅的矢量衍射理论和薄膜的椭偏理论，详细分析了光栅的椭偏特性；并且根据一些椭偏特性设计出一款正入射反射型单波长1 4波片；在光栅参数的椭偏反演中，引入正单纯形法作为反演算法，分别以各向同性的正弦形金属光栅和各向异性的阶梯型光栅为例，在标准椭偏值的基础上加入不同偏差的高斯噪声来模拟实际的椭偏测量值进行反演，在一定精度范围内得出满意的光栅参数，说明光栅参数的椭偏测量是可行的；还就入射角的选取问题进行了一定的探讨。