光反射

At each point on the surface, the laws of refection are obeyed, but the angle of incidence varies from one point to another.

纸的表面上任何一点都遵循光的反射定律，但每个入射角都不同。

When white light enters the diamond, part of the ray is reflected back to your eye, but the rest penetrates the stone.

当白光进入钻石，部分的光线反射回来，你是眼睛，但是其余的石头渗透。

After calculating the grating fringes, white incident light will be reflected as a specific ray color according to the distance of two cars. The reflector strip has no power consumption and is easy to manufacture.

经过计算后的光栅反光纸，白光入射时会反射特定的色光，此种反光纸不需要能量来驱动、且方便制作，可成为一种路况警告标志。

Newton also built the first practical reflecting telescope and developed a theory of colour based on the observation that a prism decomposes white light into the many colours that form the visible spectrum.

在力学上，牛顿阐明了动量和角动量守恒的原理。在光学上，他发明了反射式望远镜，并基于对三棱镜将白光发散成可见光谱的观察，发展出了颜色理论。

Lost and cost are two problems which are difficult to be resolved coinstantaneous in Fiber Bragg grating reflection signal pickup. We analyzed the spectra transmission characteristics of FBG Sagnac loop with coupled mode theory , and discussed the affection of optical path difference to its transmission.

论文利用模式耦合理论，对光纤Bragg光栅Sagnac环的传输特性进行细致的讨论，分析了光程差对其传输特性的影响，并提出了光纤光栅Sagnac环包络带通滤波器的概念，指出其在光纤光栅反射信号提取中的低损耗和低代价的特性，最后通过实验研究验证了理论上的分析和构想。

In discussing the properties of reflection and refraction of fiber grating, the coupled-mode equation, envelope function, transform matrix formalism, multilayer and optical path approximation are used for describing the linear and nonlinear characteristic of optical fiber grating.

在分析光栅的反射和透射规律时，采用了耦合模式法，包络函数法，转换矩阵法，多层介质薄膜法以及光程法，这些方法虽然具有不同的数学和物理模型，但在分析光纤光栅这一特殊的波导结构时，可充分展现它的线性和非线性特性。

Studies on basic working principles and designs of fiber lasersThe basic working principles as well as the major characteristics of laser and fiber lasers are firstly reviewed,including the interaction between light and matter, the laser oscillation conditions and the spectrum distribution,the gain characteristic and spatial hole burning effect,the influence of external environment on the stability of laser output and the actual limits of fiber laser bandwidth;The designs of bidirectional single-mode Er-doped fiber ring laser and multi-wavelength laser is then discussed,respectively;The characteristics of dynamic grating reflection spectrum of the fiber saturable absorber is systematically analyzed.?

在激光型光纤传感器的设计、实验现象的理论解释等方面做了如下的研究工作：光纤激光器的基本原理与设计方案概述了激光和光纤激光器的基本原理，包括光与物质的相互作用，激光振荡的条件及频谱分布等激光产生的基本原理：掺铒光纤的增益性质，空间烧孔效应和外界扰动对激光输出稳定性的影响，光纤激光器的实际极限带宽等光纤激光器的相关知识；分别讨论了双向单纵模环形腔激光器和多波长激光器的设计方案；系统地分析了掺杂光纤饱和吸收体中形成的动态光栅的反射谱特性。

This paper presents the principle of optic time domain reflectometer and the fault location of optic fiber cable line by OTDR.

介绍了光时域反射仪的测试原理及其对光缆线路中经常出现的光纤故障点进行了分析，并简述了用OTDR测量时应注意的问题。

A Brillouin scattering-based time domain reflectometer is designed.

设计了基于布里渊散射的光时域反射计。

The principle,advantages,disadvantages,application areas and the problems in application of the distributed optical fiber sensors based on optical time domain reflectometer are summerized.

总结了基于光时域反射(OTDR，BOTDR，ROTDR)的分布式光纤传感器的原理、优缺点、应用领域以及在应用中存在的问题。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。