查询词典 Fresnel diffraction

Chapter 4 The Computation of Complex Argument Fresnel Integral and Complex Ar gument Transition Function and Their Properties The computation of complex argument Fresnel integral and complex argument transition function is a difficult problem meeted in electromagnetic scattering of lossy dielectric wedges.

第四章 复宗量Fresnel积分和复宗量过渡函数的计算及其性质复宗量菲涅耳积分的计算和复宗量过渡函数的计算是有耗介质劈电磁散射中遇到的一个难题，目前无表可查，对其性质也知之不详。

Diffractive efficiency of Fresnel lens is important factor to evaluate the quality of Fresnel lens.

菲涅耳透镜的衍射效率是评价菲涅耳透镜质量的一个重要指标。

This article through analyzes the Fresnel formula thoroughly earnestly, theoretically development and analysis of the application of Fresnel formula.

本文通过认真透彻地分析菲涅耳公式，从理论上拓展和分析菲涅耳公式的应用。

The linewidth error of 16-step Fresnel lens is measured and its effect on 16-step Fresnel lens is analyzed.

通过实验测量16阶菲涅耳透镜的线宽误差，分析其对16阶菲涅耳透镜衍射效率的影响。

The off-axis reflection system composed of four aspheric mirrors was designed, but the system structure was not so simple and the performance can also be improved, besides, manufacture and test for large aspheric mirrors are difficult; and then the spherical Fresnel mirror which is easier to be manufactured and tested was used to replace the aspheric mirror, the spherical Fresnel mirror has low cost of replication, but this design also can\'t be used in projection lens because it was only feasible in narrow wavebands; Furthermore, the design making use of catadioptric projection lens was accomplished, this design is greatly applied in rear projector because it has merits of both refraction and reflection. But it had difficulties in color aberration correction and had complex structure.

设计了四片非球面组成的离轴式反射系统，然而，仅采用非球面设计系统结构不够精简，性能也有待进一步提高，且非球面面形较大时加工和检测都存在一定的困难；继而提出了用球面Fresnel反射镜代替非球面的设计方法，虽然Fresnel反射镜加工和检测更为简单，且复制成本低，但对波长具有选择性；进而，应用折反系统结合的方式设计了离轴式投影镜头，该方法因兼具折射和反射的优点，在大屏幕超薄背投系统的设计中广为应用，缺点是会产生难以校正的色差，且结构复杂。

The focal properties of varifocal Fresnel lens was studied in experimental, experimental results showed that the deformation of surface of LCoS will lead to diffusion of the focal of Fresnel lens, one correction method was mentioned.

然后利用已经制作的LCoS相位空间光调制器，实现了可编程的变焦菲涅尔透镜，通过实验研究了变焦菲涅尔透镜的聚焦特性，发现LCoS器件的表面弯曲会导致聚焦焦点的弥散并设计了校正的方案。

Here the diffractive lens – Fresnel lens is used because the Fresnel lens has several advantages such as much larger aperture, thin and light.

在这里，所采用的是绕射式的Fresnel透镜，因为Fresnel透镜有孔径大薄和轻的优点。

In order to control the warpage of Fresnel lens in micro-injection molding process, the model of non-linear relationship between the injection process parameters and the maximal warpage of Fresnel lens was established through the support vector machine.

为了控制菲涅尔透镜在注塑过程中的翘曲变形量，采用支持向量机算法建立了菲涅尔透镜的翘曲预测模型，并对该模型的预测精度进行了研究。

In practice the diffraction pattern is iteratively solved at ever-increasing "shells" of resolution; the crystallographer alternates between building a model structure （working in "real" space） and comparing the model's calculated diffraction pattern with the observed diffraction pattern （working in "reciprocal" space）.

在实际操作中这一衍射图形被反复地不断升高的分辨率处理，结晶学家不断在建立一个模型结构并按该模型计算出的衍射图形与实际观察到的比较。

In practice the diffraction pattern is iteratively solved at ever-increasing "shells" of resolution; the crystallographer alternates between building a model structure （working in "real" ace） and comparing the model's calculated diffraction pattern with the o erved diffraction pattern （working in "reciprocal" ace）.

在实际操作中这一衍射图形被反复地不断升高的分辨率处理，结晶学家不断在建立一个模型结构并按该模型计算出的衍射图形与实际观察到的比较。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。