In order to get a dual-wavelength tunable CO2 laser, a two-resonator laser is developed, which consists of an output coupler and two diffraction gratings. 为了获得两束波长不同的可调谐CO2激光脉冲,激光器采用双光栅与输出镜构成双谐振腔的结构设计。
Composition of inorganic phases and order degree of lamellar structure were characterized by X-ray diffraction ( XRD). 用XRD表征了合成产物的无机相组成和层状结构的有序度。
In order to suit low resolution of the liquid crystal light valve, an imaging lens is applied to amplifying joint frequency spectrum of the diffraction orders. 采用成像透镜放大各衍射级的联合频谱,适应液晶光阀较低的分辨率要求。
At the same time the effect of the optical gradient on microscop's diffraction imaging principle is stressed and points out the importance of the zero order of the gradient diffraction pattern. 同时强调在显微镜衍射成像原理上光学梯度的作用,指出梯度衍射图零级的重要性。
In order to obtain the ultrasonic speed in the medium, the deflection angle of diffraction ray and frequency of ultrasonic is calculated by the experiment of acoustics and optics effect. The ultrasonic speed in the medium can be calculated by formula. 为了获得介质中超声波的速度,利用声光效应实验,测量并计算衍射光的偏转角和超声波的频率,通过公式计算介质中超声波的速度。
Based on the first order Born approximation and the plane wave expansion of the Green function in two-dimensional ( 2-D) scattering problem under the plane wave illumination, a 2-D diffraction tomography ( DT) imaging algorithm is presented. 以一阶Born近似和格林函数的平面波谱展开为基础,导出了平面波激励情况下的二维衍射层析成像算法并给出了详细的算法处理流程。
In order to analyze the reason of unsatisfactory pattern in which spectral lines interveined each other, X-ray diffraction experiment and observating surface of muscovite were conducted. 为了分析谱线图像数据相互混叠、相互交错的原因,对丹巴天然云母还进行了X射线单晶衍射实验与表面观察实验。
The average hopping stop-distance calculated from the test data is about the order of 10  ̄(-8) m. This result has been demonstrated by the X-ray diffraction of the film recently. 根据电荷衰减实验得出的数据进行计算,电荷跃迁的平均步距具有10 ̄(-8)m左右的大小,X射线衍射实验对此进行了验证。
Based on the optical wave guide mode coupling theory, affection of this kind of non ideal index distortion is analyzed. It is theoretical demonstrated that, the second order index distortion of fiber can cause second order Bragg diffraction. 本文着重利用光波导模式耦合理论分析了这种非理想的折射率分布对光纤光栅反射性能的影响,得出了2阶折射率畸变将引起光栅的2阶衍射的结论;
In order to compute the width of the center bright stripe according to the accurate position of diffraction dark fringes, the least square method was used to fit quadratic curves of the intensity distribution. 在测量单缝衍射中央明纹的宽度时,提出了用最小二乘法对测量到的衍射图像的光强分布进行二次曲线拟合,并由拟合得到的数学表达式,确定衍射暗条纹的精确位置。
From the viewpoint of the geometrical imaging theory, the second order circular and flat field imaging properties of holographically concave diffraction grating spectrographs with a fixed entrance slit and the circular or flat field image are investigated by use of a straightforward analytics. 从全息凹面光栅几何成象理论出发,用简捷的解析方法研究固定入射狭缝全息凹面衍射光栅摄谱装架二阶圆场和平场成象特性。
In this paper, in order to ascertain the process of intercalation, the product of intercalation was characterized by means of X-Ray Diffraction, Atomic Absorption Spectroscopy, Thermogravimetric analysis. 本论文利用X射线衍射、原子吸收光谱、热失重等手段对不同反应时间的插层产物进行表征,以确定插层反应过程。
Additionally, stress conditions were tested by metal magnetic memory method in order to execute early diagnostics of the inspection object before each X-ray diffraction tested. 为准确找到测点位置并寻求两种方法之间关系,在每次应力测试之前,均用金属磁记忆方法进行了先期检测。
In order to improve the convergence rate, a correct Fourier expand method was introduced to differential theory of the finite conductivity diffraction grating. 在有限电导率光栅的微分理论中引入校正傅里叶展开方法,改善了计算收敛性。
In order to control the texture of tin deposits and improve their properties, the effects of surfactant concentration, current density and deposit thickness on the texture of tin deposits were investigated by X-ray diffraction. 为了在实际应用中控制甲基磺酸电镀锡镀层的织构以提高镀层性能,采用X射线衍射分析方法研究了镀锡工艺中表面活性剂浓度、电流密度和镀层厚度对镀锡层织构的影响规律。
Al/ Al_2O_3/ SiC/ ZrO_2. In order to study the sintering performance of each prescription in advance, carry on volume and quality change to each sintering sample of prescription analysis, XRD diffraction phase analysis and SEM micrographs etc. Al/Al2O3/SiC/ZrO2。为了预先研究各个配方的烧结性能,对各个配方的烧结试样进行了体积和质量变化分析、XRD衍射物相分析以及SEM电镜断口和表面形貌观察等。
In order to eliminate the false singularities in the Fringe Components of Equivalent Edge Currents expressions, this paper extends the treatment of false singularities of diffraction coefficients in the Physical Theory of Diffraction into the Fringe Components of Equivalent Edge Currents expressions. 为消除等效电磁流边缘分量表达式中虚假奇异点,将物理绕射理论中处理绕射系数的虚假奇异点的方法推广到等效电磁流边缘分量表达式中。
The degrees of LEO ( Long Range Order) and magnetic moments of the Fe atoms in a Fe-Si-Al alloy have been determined by neutron diffraction. 用中子衍射方法测定了Fe-Si-Al合金的长程有序度和Fe原子的磁矩。
In order to inquire into the worn mechanisms, the morphology and structure of worn surfaces and wear debris were examined through using optical microscopy, scanning electron microscopy, X-ray diffraction, laser Raman micro-spectroscopy. 采用金相、扫描电镜、X射线衍射、拉曼光谱等手段对不同试验条件下的摩擦表面、磨屑的形貌与结构进行了检测,探讨了C/C复合材料的磨损机理。
The chemical short range order of the Al Fe Ce amorphous alloy was studied by means of X ray diffraction, differential scanning calorimetry. 采用X射线衍射及DSC热分析研究了合金成分对AlFeCe非晶合金化学短程序的影响。
The mesostructure order was retained after the growth of the nanoparticles, as pointed out by small-angle X-ray diffraction measurements. 小角XRD显示在生成纳米粒子后,薄膜的有序介孔结构未受到破坏。
In order to study the combustion process of the TiSi_2 – SiC – N2 system in details, the reaction was stopped at different stages by quenching the samples. The composition and microstructure in different reaction zones were analyzed by X-ray diffraction and scanning electron microscopy. 利用燃烧波淬熄法使反应各个阶段的物相得以保留,通过X射线衍射及扫描电镜分析TiSi2在燃烧合成中的反应过程及显微组织转化。
Using the mirror-tree of son-brothers, the order of reflection and diffraction can be changed. 运用该镜像树的特点实现了反射阶数和绕射阶数的可调节性。
In order to reduce the focal spot size of converged red-laser, an optical pickup OL beyond the diffraction limit is needed. 为缩小红光焦斑尺寸,需要设计突破衍射极限的光学头物镜。
In order to correct the PO results, the edge diffraction field based on NURBS curved edge is computed by physical theory of diffraction ( PTD). 为了修正物理光学法的结果,论文采用物理绕射理论计算基于NURBS曲面棱边的边缘绕射场,以改善物理光学法的结果。
And it was laying the ground work for the behind of the analysis. 3 、 The relationship between the order of liquid surface wave diffraction and the incidence angle was discussed. 对低频液体表面波的衍射级和入射角的关系进行了讨论。
The diffraction light of the main order can be obtained by the reasonable choice of the pinhole aperture of the measuring device, and the subprime diffraction light will be filtered out, ensuring the accuracy of the measuring results. 通过合理地选择测量装置中针孔光阑的大小,能够精确地得到一级衍射的能量,并滤掉次级衍射对测量结果的影响,保证了测量结果的准确性。
Due to the subelements of the DOE we studied are in the hundreds or several tens of microns order of magnitude, so the design method is based on the scalar diffraction theory. 由于所研制的光学元件的衍射子单元在几百或几十微米的量级,所以采用基于标量衍射理论的设计方法。