查询词典 diffraction grating

Ray tracing theory is used to obtain phase and universal polynomial function of grating, and the coefficient of the polynomial function is optimized by genetic algorithm. Several grating splitters with ratio 1:2×2, 1:3×3, 1:4×4 and diffraction efficiency 81.83%, 81.11% and 74.01% respectively are designed based on the method.

该方法根据光线追迹原理设计获得光栅相位和面形多项式函数通式，采用遗传算法优化面形多项式函数系数，分别设计了分束比为1：2×2、1：3×3、1：4×4的光栅分束器件；其衍射效率分别为81.83%、81.11%和74.01%；三个器件的光强均匀性分别达到0.02394、0.1838和0.1912，并用Matlab进行了仿真。

The fabrication of transmission gratings with the grating constant of 2.5μm and 5μm is studied in ZK6 and LaF2 glasses at the machining speed of 400μm/s by using femtoscond laser with the peak intensity of 2.7×10~(13)W/cm~2, and the diffraction patterns of the grating are presented with a semiconductors laser at 650 nm.

在加工速度为400μm/s、激光的峰值功率密度为2.7×10~(13)W/cm~2时，在ZK6玻璃和LaF2玻璃内制备出光栅常数为2.5μm和5μm的透射式衍射光栅，并在650nm的半导体激光照射下获得了光栅的衍射图样。

The thesis indicates that grating is a diffractive element, when the diffraction elements diffracts light into the solar cell, and the diffractive grating can be reflected due to its diffractive feature.

研究中所使用的光栅为一个绕射元件，在太阳能电池上制作一个绕射光栅，这个绕射元件可以将太阳光直接穿透至太阳能电池，并且也可以从太阳能电池反射的太阳能，进一步的进行再利用。

The impact of the thickness of volume H-PDLC grating on the wavelength selectivity of Bragg diffraction are simulated numerically, as well as the theoretic relationships among the refractive index modulation, spatial frequency and the H-PDLC diffraction efficiency.

计算机模拟了体光栅厚度对于布拉格衍射波长选择性的影响，以及折射率调制深度、空间频率和H-PDLC光栅衍射效率的关系。

The diffraction efficiency of a gold transmission phase grating is simulated as a function of the depth of grooves and the duty cycle on the basis of the scalar diffraction theories.

根据衍射光栅的标量理论，计算并讨论了金透射光栅在软X波段衍射效率对光栅厚度和占宽比的依赖关系。

With the help of the diffraction theory grating,the influences on diffraction efficiency of MGSs were discussed.

利用光栅的衍射理论对衍射效率变化进行了分析。

Week 8 Huygens- Fresnel principle, Fraunhofer diffraction, grating diffraction

第8周 惠更斯－菲涅耳原理；夫琅和费衍射。光栅衍射。

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。

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。

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。

The teacher likes the honeymouthed little girl very much.

老师很喜欢这个嘴甜的小姑娘。

Mr. Notker Bien's interests are traveling, spending quality time with the family and long-distance-running.

诺特卡·柏恩先生热爱旅游，长跑，以及和家人一起共度美好时光。