查询词典 Fresnel

Based on the Fresnel diffraction integral and the complex Gaussian expansion for the hard-edge aperture function, a simple and analytical expression for calculating the diffraction field distribution of an apertured lens is presented.

基于菲涅尔衍射积分和将硬边孔径函数展开成有限项复高斯级数方法推导出了计算透镜衍射光强分布的解析表达式。

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。

When an image digital holographic microscopy layout is employed, the Fresnel integral cannot be used in separating the reconstructed image from its conjugate image and background.

在像面数字全息中，用菲涅尔衍射积分进行复振幅再现的方法已不适用，将相移同轴技术与数字全息显微术结合，研究了以平行光为参考光记录相移同轴像面显微数字全息图及其幅度和相位再现方法。

Because the transform matrix calculated with the Fresnel integral was non-unitary,YG algorithm was used to design the DOE realizing beam shaping in the fractional Fourier transform domain in this paper.

鉴于该变换矩阵非幺正，本文利用YG算法进行了光束整形器件的设计。

However, combining image plane DHM with the phase-shifting in-line technique, the complex amplitude of reconstructed image can be obtained without using Fresnel integral, moreover the approximate error of reconstruction calculation is easily eliminated and the signal-to-noise ratio of reconstructed image is significantly improved.

理论分析和实验证明，用这种方法无需使用菲涅尔积分即可直接获得再现像的复振幅，提高了再现像的信噪比，避免了再现中的近似误差。

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 results of computer simulation can provide theoretical basis for the fabrication of Fresnel lens.

模拟计算结果对多阶菲涅耳透镜的制作提供重要的理论指导。

A method of making the Fresnel lens is described.

本文还描述了制造菲涅耳透镜的方法。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。