查询词典 Fresnel diffraction

Under the oblique incidence cases, the optical path difference of light beam distributed on the edge of steps can be calculated by using the geometric method. Then, according to the multi-slit Fraunhofer diffraction, the expression of diffraction intensity of reflection step grating is deduced.

针对反射性阶梯光栅，利用几何方法计算出斜入射情况下光束在台阶边缘的光程差的分布情况，根据多缝夫琅和费衍射推导出反射型阶梯光栅的衍射光强表达式。

It was observed that there are two types of shock interaction from the edge of the reflector which are known as the diffraction shocks. For weaker shock diffraction, both shocks are crossing each other which is corresponding to the regular reflection.

在绕射震波的型态观察方面则有交叉和不交叉的两种结果：当绕射震波强度较强时，绕射震波不交叉，为马赫反射的结果；绕射震波强度较弱时，则绕射震波相交叉，为正规反射的结果。

Computer optical element based on light-wave diffraction theory is through that etches on film base to produce relievo structure with two or multiple sidestep depths , and form pure phase and coaxial recurrence , so it has higher diffraction efficiency .

计算机光学元件基于光波衍射理论，通过在片基上刻蚀产生两个或多个台阶深度的浮雕结构，形成纯相位并同轴再现，使其具有极高的衍射效率。

Epitaxial growth of GaN on sapphire and novel substrate LiAlO〓 1 The growth mechanism of GaN on sapphire substrate was investigated using AFM, X-ray diffraction, X-ray double crystal diffraction, Rutherford back scattering etc.

阐明了衬底表面的氮化处理、缓冲层的生长对外延膜结晶形貌、结晶质量、以及外延匹配关系的影响规律。

Probe into theory of X-ray diffraction testing residual stress in glass-ceramic and effect on accuracy of stress with the X-ray diffraction.

探讨了X射线法测量微晶玻璃残余应力的原理及该方法对残余应力值精确度的影响。

The principle of the method is as follows: The method employs a transmission grating plate placed over a sample surface at a small distance h. According to diffraction theorym an incident light wave is divided into both reflected and transmitted diffraction waves at the grating plate.

该方法的原理如下：该方法采用了透射光栅放置在一个小的距离超过每小时板样品表面据衍射theorym事件光波分为既反映和传播的格板衍射波分歧。

For a given total exposure dose, the diffraction efficiency of the diffraction grating first increases and then decreases with increasing the exposure intensity, and this effect becomes more remarkable with increasing the unsaturation concentration of polymeric binders.

高分子感光膜的衍射效率随着高分子载体折光率的增大而提高，同时其饱和曝光剂量随着感光膜体系中丙烯酸双键含量的增大而降低；单体良好的迁移性能及其与高分子载体良好的相容性都将大大提高感光膜的衍射效率。

In this research, we choose core material of paragliding cord barding, and this shows typical diffraction patterns for the PBO fiber and Kevlar fiber by synchrotron diffraction patterns.

本研究以PBO纤维为主要材料，同时经由20、40、60和80小时的碳弧光连续照射对PBO纤维的断裂拉伸强力影响做探討。

TEM shows that drying by direct heating might result in hard aggregation of the tourmaline powder, while hard aggregation might be avoided by azeotropic distillation. Raman spectroscopy reveals that there are O_H and C_H on the surfaces of the tourmaline powder obtained by azeotropic distillation, which indicates that butoxy is chemically adsorbed on the surfaces of tourmaline particles, but not adsorbed on those formed by direct drying. X_ray powder diffraction shows that the intensity of diffraction peaks decreases after grinding. There is no damage to the tourmaline crystal lattice in the process of direct heating, azeotropic distillation, or ultrafine grinding.

透射电镜分析结果表明，直接加热脱去水或正丁醇会使电气石超细颗粒发生硬团聚，而共沸蒸馏法则可有效防止硬团聚的产生；拉曼光谱结果表明，共沸蒸馏法制备的电气石粉末表面存在O—H和C—H键，说明正丁醇在颗粒表面为化学吸附，而直接干燥法得到的电气石粉末表面则没有；X射线粉晶衍射结果表明，研磨过程降低了粉末衍射峰的强度，但直接加热干燥和共沸蒸馏干燥均未破坏电气石的晶格结构。

X-rays are used because they have the same wavelength as the atomic separations so the crystal acts as a molecular diffraction grating to diffract a beam of X-rays, producing a diffraction pattern that can be captured and analyzed.

之所以使用X射线是因为其波长和原子裂解时的波长一样，所以晶体作为分子衍射光栅衍射X射线，产生一种可以获取并分析的衍射图形。

If you were not , and OS X just booted normally, have no fear.

如果你没有，和OS X刚刚启动通常，没有恐惧。

I only want to preserve our all .

我只想保存好我们的一切