衍射角

数值结果表明：锥面AWG布里渊区的中心区域辐射能量最大，并得到传输系数与轴向距离z及衍射角的关系，计算得到的基本参数与仿真结果相吻合。

Numerical results demonstrate that the most radiation power is in the Brillouin center zone Ω, the relation between transmission coefficient Tm and diffraction angle a is obtained , and the calculation is in agreement with the simulation result .

入射偏振光通过空间周期电场作用下的液晶盒，一级衍射角和衍射光强受到电压的调制。

The basis is that when incident polarized light gets through a liquid-crystal box , it 's first diffraction angle and optical intensity are controlled by periodic electric field .

La掺杂ZnS薄膜晶粒增大，XRD衍射角向小角度稍微偏移。

The grain particle size of ZnS tends to increase and the diffraction angle of La-doped ZnS films slightly shifts to lower angle with La doping .

理论计算表明布拉格衍射角及其变化十分微小（弧分、秒数量级），所以能否在实践中成功地检测受Ω调制的布拉格衍射角，关系到SAW陀螺效应声光探测和检测方案的成败。

However , the diffracted angle and its variation due to SAW gyroscopic effect is very tiny ( arcmin and arcsec level ), so the key to the plan is whether such a tiny Bragg diffractive angle can be measured with success .

对薄膜微观结构的分析显示，XRD图谱在衍射角为3°附近出现较强的有序介孔结构的特征衍射峰，TEM图像也观察到了明显有序排列的孔道结构。

The analysis of the microstructure of the thin film showed that the XRD spectrum of the thin film had unique diffraction peak around 3 ° related with the ordered mesoporous structures and well orderly arranged pores could be seen in the TEM pictures of the film .

体全息光栅偏移布拉格角读出时衍射角的测定

Experimental determination of the diffraction angle of volume holographic gratings under off-bragg condition

最后讨论了具有化学短程序合金的全干涉函数在零衍射角附近的行为。

Finally , the behavior of the total structure factors near the long wavelength limit for alloys , which have chemical short range order , is discussed .

采用不同的衍射角对微晶玻璃的应力进行测试，对应力结果进行了比较，分析了应力产生误差的原因。

In this paper , residual stress was measured with different diffraction angle , then the errors and caused reasons were analyzed by contrasting the resting results .

由校正后的公式计算的成象点，其衍射角及坐标值可获得精确的结果。

The exact results of the diffractive angle and coordinate value for imaging point can be obtained if corrected coefficient is used in these formulas to correct .

随衍射角增大，轴外光谱红移比无啁啾参数时快。脉冲宽度较小时，啁啾参数增大，轴上光强增大，横向光强分布越集中于传输轴附近；

On-axis intensity increases with increasing chirp parameter for relatively small values of the pulse duration , and transversal intensity distribution is concentrated near to the propagation axis .

但是当系统衍射角σ0较小时，特别是在湍流效应较弱的情况下，抖动的影响非常显著，此时光束扩展主要是由系统抖动项所决定的。

But when the angle radius is small , especially for turbulent effects being weak , the effect on the beam spreading is very distinct , and the magnitude of the beam spreading is mainly dependent on the jitter item of the scaling relations .

根据衍射角谱理论，利用计算机数值计算了由正三角形和正六边形组成的衍射平面的夫琅和费衍射光强分布，分析并比较了两者的衍射光强分布特点，并用实验验证了上述数值计算的正确性。

According to the angular spectrum theory , the Fraunhofer diffraction light intensity distribution of the equilateral triangle and the equilateral hexagon is calculated by computer , the characteristics of their light intensity distribution is analyzed and contrasted , and it is proved by experiments .

X射线衍射Bragg's角计算，公式比较复杂，难以准确地得出Bragg's角。

X - ray diffraction calculates the Bragg 's angle . the formula is very complex , it is quite difficult to educe the Bragg 's angle accurately .

分析了空间频谱具有有限宽度的原因。进一步指出空间频谱宽度与相干面积成反比，空间频率越高的光波偏离光轴的角度越大，空间频谱宽度越大的光波，其衍射发散角越大。

The reason of limited spatial frequency spectrum is analyzed .

根据煤矿井下粉尘衍射光角谱特征，研制出利用模式识别算法实时井下检测的光电粉尘传感器。

The pattern recognition algorithm was presented according to dust diffraction angular .

利用平面波衍射的角谱理论，分析计算了二元相位光栅衍射光场的空间分布，特别讨论了离焦量和非单色光对泰伯像的影响。

The spatial distribution of Fresnel diffraction field of binary phase gratings is analyzed by using RSD theory .

文章在标量衍射理论角谱表示的基础上，以平面波圆孔衍射为例，给出了衍射场的级数解，分析了级数解的有效性；

In this paper , on the basis of the scalar diffraction theory of the angular spectrum representation and by taking the circular aperture diffraction as an example , power-series expansion corrections to the paraxial approximation are derived .

广义布拉格方程不受晶体尺寸限制，可以在正空间中描述微晶体衍射的角发散，薄晶体的衍射，多晶体衍射的积分强度等问题。

This Bragg Equation is without limit on crystal size , can be used to describe the angular divergence of minicrystal diffraction , diffraction of thin crystal , and the integral intensity of polycrystal diffraction in positive lattice , etc.

高分辨率直接驱动直接读取衍射光栅角位置的控制系统不仅可消除传统齿轮减速机构固有的各种误差，而且可大大提高光栅扫描速度。

The control system of high resolution , direct drive and direct reading of diffraction raster 's angle position can not only eliminates the diverse inherent errors of the traditional gear decelerating mechanism , but also greatly improve the scan speed of the raster .

BD&1型高精度Bragg衍射仪θ角微位移驱动系统

A driving system for 0-angular displacement of the model BD-1 Bragg high accuracy diffractometer

用广角X射线衍射、小角X光散射等手段对硬弹性聚丙烯中排状堆积片晶的形成及结构进行了研究。

The formation and the structure of the unique piled lamellae rows in hard elastic polypropylene have been studied by WAXD and SAXS techniques .

运用广角X射线衍射和小角X射线散射研究了PAN原丝晶态结构和纤维微孔网络结构形态的演变规律，并且借助扫描电镜研究了PAN纤维结构形成过程中空洞缺陷的形成机理；

The formation of crystal structure and the development rule of the micropore structure in PAN precursor were studied by wide angle X-ray diffraction and small angle X-ray diffraction .

运用模板法并结合酸碱对理论来合成多孔材料TiPOx，并对不同条件下所得到的TiPOx材料分别用广角X射线衍射、低角X射线衍射和N2吸脱附等实验进行了表征。

Ordered porous titanium phosphate materials were prepared by use of template method combined with the acid-base theory . The samples were attained under the different conditions and were characterized by large and small angle X-ray diffraction , N2 adsorption / desorption techniques .

衍射问题的角谱计算法

A Method of Calculating the Diffraction by Angular Spectrum

模拟计算了超短脉冲波场入射下其衍射层析的角分布与面分布。

The angle distribution and plane distribution of the diffraction tomography with ultrashort pulse incident wave was simulated .

通过元素分析、红外光谱、电子衍射和接触角测定等研究了聚合物结构与性能。

The structure and properties of polymer were investigated by using FR IR , electron diffraction and element analysis .

我们可以取中心衍射环的角直径作为角分辨率的一种自然极限。

As a natural limit for angular resolution , one may take the angular size of the central diffraction disk .

煤矿井下粉尘的实时测量是安全生产的一个重要环节，根据粉尘衍射光的角谱特征，已提出可适用于井下实时粉尘检测的模式识别算法。

Real time detection of coal mine dust is importance to safety in production . The dust pattern recognition algorithm is presented based on diffraction angular distribution .

同时，基于瑞利-索莫菲衍射公式和角谱理论，通过建立合适的模型，数值模拟了不同像平面上的衍射光场强分布。

At the same time , based on Fresnel-Kirchhoff diffraction theory and angular spectrum theory , we numerically simulates the intensity distributions of the SH waves at different observation planes .

为提高井下粉尘计重含量检测精度并同时获得粒度分布参数，根据井下粉尘衍射光的角谱特征，提出了一种适合于在单片机上运行的算法。

For the purposes of improving the detect precision of weight density and size distribution parameters of coal mine dust , based on the mathematical model of angular distribution coal mine dust diffraction and its feature , the algorithm suitable for single-chip computer is put forward .