查询词典 refraction

The X-ray compound lens is a novel optical device that focuses X-ray radiation by refraction effect.

X射线聚焦组合透镜是一种利用折射效应对 X射线辐射聚焦的新型元件。

In the second chapter, during the study of compound x-ray refractive lenses, diffraction function of compound lens is derived in the light of refraction and absorption effect and the design theory of X-ray is deduced using diffraction theory in connection with the characteristic of X-ray band.

在第二章X射线聚焦组合透镜的研究中，针对X射线波段的特性，综合考虑折射和吸收效应得出组合透镜的衍射屏函数，利用衍射理论推导出X射线聚焦组合透镜的设计理论并进行结构设计与微细加工制作技术研究。

The theoretical and numerical study of such a device is reported, including the derivations of the diffractive screen function of the compound lens and the equations of the intensity distribution in the focus plane by considering both refraction and absorption effect and diffraction theory.

针对 X射线波段的特性，综合考虑折射和吸收效应得出组合透镜的衍射屏函数，并利用衍射理论推导出 X射线组合透镜的设计理论。

The tempral properties of the nonlinear refraction in Cadmium porphyrin and Methyl orange areproposed by pump-probe technique.It can be used as all optical switch based on nonlinear refractioneffect.It was numerical simulated and analyzed theoretically.

利用泵探技术测量了类卟啉镉氯仿溶液和甲基橙水溶液非线性折射效应的时间特性，并指出这一效应可用于实现折射型全光开关，从理论上分析了双光束技术折射效应的时间特性。

To avoid the shortcoming of magnification change with wavelength, which will cause the spectral image pixel registration error and provide inaccurate relative spectral signal strength in the classical diffractive optic imaging spectrometer, a novel hybrid refraction/diffraction telecentric optical system combining a diffractive lens with an achromatic lens system is presented, and the working principle is then established.

为了克服在传统衍射光学成像光谱仪中，衍射透镜的焦距随波长变化引起系统放大率随波长变化，从而导致光谱图像的像元配准误差，得到并不精确的相对光谱信号强度，提出了将衍射透镜与消色差透镜系统相结合的新型折/衍混合、二组元复合远心成像光学系统的技术方案，具体分析推导了该系统的成像理论。

Such distinct constitutive parameters have brought the medium several quite unique electromagnetic properties, such as negative refraction, reversed Doppler effect, reversed Cerenkov radiation, etc.

其独特的本构参数给予了这种介质独特的电磁特性，比如负折射、逆多普勒效应、逆？

The new electromagnetic properties of negative index material such as converse Cerenkov radiation and converse Doppler effect,negative refraction index and perfect lens are analyzed and explained by using basic electromagnetic theory.

从基本的电磁场理论出发，分析和解释负折射物质的电磁特性，以及负折射物质中的逆Cerenlov现象、逆Doppler现象、负折射率和完美透镜的工作原理，帮助人们更加清楚地认识负折射物质的本质特性，更好地开发和应用好负折射物质。

The unique negative refractive materials possess some unusual properties, such as negative refraction ,reverse Goose-Hanchen shift and negative Cerenkov radiation ,however all of these phenomena do not violate any fundamental principles.

然而，所有这些现象并不会有悖于基本原理。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。