查询词典 Fresnel diffraction

On the basis of theoretical analysis of digital holography, the preliminary study carries out through computer simulation and experiments. The main work is as follows:Firstly, on the basis of off-axis Fresnel diffraction, the principles of optical holography and digital holography are introduced. Besides, the theories such as recording digital hologram, numerical reconstruction and the related digital image processing methods are analyzed.

本论文从理论分析、计算机仿真和实验三个方面对数字全息技术进行了初步的研究，主要完成了以下工作：首先，介绍了传统的光学全息术和数字全息技术的基本原理，以离轴菲涅耳全息为例对数字全息的记录条件、数值重现算法、以及相关的数字图像处理方法进行了详尽的理论分析。

The speckle velocity equal to the nano-particle velocity in the fresnel diffraction field is proved in theory.

根据这个结论，利用高速CCD拍摄散斑图，并进行图像处理获得与散斑运动速度相关的信息就可以得到纳米颗粒的运动速度。

Applying Fresnel diffraction theory, this technique is proved to enlarge the equivalent dimension of CCD and increase the cutoff frequency of optical system, so this method can improve the imaging resolution of digital holography.

用菲涅耳衍射理论证明了该技术可有效增大CCD探测器的等效尺寸和系统截止频率，从而提高数字全息成像分辨率。

Based on the Fresnel diffraction integral, the analytical expression for the field distribution of converging spherical waves passing through an annular aperture is derived and some special cases are discussed.

摘要基于菲涅耳衍射积分公式，推导出了会聚球面波通过环形光阑后场分布的解析公式，并讨论了一些特殊情况。

The spatial propagation properties of output annular laser beam from an unstable resonator are studied based on Fresnel diffraction integral.

本文从菲涅耳衍射积分公式出发研究了激光器非稳腔输出环状光束在空间的传输规律。

In this model, the Fresnel integral was performed in the spatial frequency domain, and the X-ray diffraction field was calculated by means of the fast Fourier transform.

该模型将Fresnel积分运算转换到空间频域，利用快速傅里叶变换计算衍射光场。

The generalized Huygens–Fresnel diffraction integral for misaligned asymmetric first-order optical systems is derived by using the canonical operator method, which enables us to study propagation properties of anisotropic Gaussian Schell-model beams through misaligned asymmetric first-order optical systems.

广义惠更斯-菲涅尔衍射积分为歪斜的非对称一阶光学系统中，推导出用典型算子方法，使我们可以研究繁殖性能的各向异性高斯夏伟模型光束通过失调非对称一阶光学系统。

Through reasonable setup and Fresnel diffraction integral, the theory of aberration correction by LSBS was proved.The aberration of wavefront was introduced by Zernike polynomial.

文中讨论了自发布里渊散射提供噪声源的LSBS发生器特性，并将此模型与目前广泛使用的分布式噪声源LSBS发生器模型进行了对比，分析了二者的优劣及适用情况。

The Propagating property of flat topped multi-Gaussian laser beams passing through ABCD optical systems is discussed on the basis of generalized Huygens Fresnel Diffraction integral formula.

利用广义惠更斯－菲涅耳衍射积分公式，研究了平顶多高斯光束通过ABCD光学系统的传输特性，推导出光强分布的解析式。

Theoretical analysis proves that,when the pixel number,pixel size and reconstructed wavelength of the hologram are certain,computer simulated algorithms of Fresnel diffraction integral fall into convolution algorithm,angular spectrum algorithm and direct Fourier trans...

通过对相位函数局域空间频率的分析，给出了判定算法适用范围的特征再现距离，并分析得出，再现距离大于特征再现距离时，适合用卷积法；小于特征再现距离时，适合采用角谱法；等于特征再现距离时三种方法都适用。

The production moved off-Broadway to New York City, where she won the Joseph E. Calloway award for her performance, and was profiled in American Theater Magazine as one of ten young theater artists to watch.

生产提出过百老汇的新的纽约市，在那里她赢得了约瑟夫calloway奖，她的表现，并于异型在美国的战区杂志之一， 10战区的青年艺术家观赏。

It's a risk tradeoff, and I believe that adding test support code usually wins.

这是一个风险的权衡，我相信添加测试代码通常会占上风。