查询词典 quadrangular prism

An inconvenience of prism couplers is that the prism material must have a high refractive index ??

棱镜耦合器的一个不方便的地方是棱镜材料必须有较高的折射率？

Face on the first glass prism element. The interference filter is formed by depositingtwo prism elements are joined together.

这个滤光片是在两个棱镜连接前由第二棱镜一面镀SiO2/TiO2复合层膜构成。

A dichroic interference filter is interposed between the two prism elements and is disposed at an angle of 221/2 to an input face on the first glass prism element.

将一块二向色干涉滤光片介入两个棱镜中，并使它倾向于第一面棱镜投入面的221 ~222 角之间。干涉滤光片是由含有二氧化硅和二氧化钛的沉积候补层制成的。

A dichroic interference filter is interposed between the two prism elements and is disposed at an angle of 221/2° to an input face on the first glass prism element.

将一块二向色干涉滤光片介入两个棱镜中，并使它倾向于第一面棱镜投入面的221°~222°角之间。

The theories of cuneiform prism and series neutral glass slices used as laser attenuator are analyzed in this paper. An aberration-free laser quantitative attenuator made of cuneiform prism is adopted and a series of neutral attenuated slices are used for adjusting laser-beam enegy at the same time.

分析了楔形镜和中性玻璃衰减片组对光束的衰减原理，采用反射式楔形镜作为无像差定量衰减器，并同时使用中性玻璃衰减片组微调光束能量。

The invention comprises a free-form surface prism with three optical surfaces, and a micro-image display; the free-form surface prism is made of plastic glass materials with the refractive index greater than 1; the three free-form optical surfaces are concave surfaces, which meet one of the three surface-type equations, and the location relationship of each surface meets three condition equations; the incident angle formed between the widest-field upper edge rays emitted by an LCD and the second free-form surface meets the total reflection conditions; and an image source element is an LCD of 0.61 or 0.59 inches.

本发明包含一个具有三个光学表面的自由曲面棱镜和一个微型图像显示器，自由曲面棱镜采用折射率大于1的塑料玻璃材料，自由曲面棱镜的三个自由曲面光学表面均为凹形面，它们应满足三个面型方程之一，并且各表面的位置关系应满足三个条件方程，由LCD发出的最大视场上边缘光线在第二自由曲面上的入射角应满足全反射条件，像源元件为0.61或0.59英寸的LCD。

The measurement setup is composed of polarizing prism, normal quarter-wave plate, analyzing prism, lock-in amplifier and microprocessor.

测量系统主要由起偏棱镜、标准四分之一波片、检偏棱镜、锁相放大器和微处理器构成。

Phase coating on roof prism serves mainly for reducing interruption of light inside roof prism and thus enhance acutance of images.

在屋脊棱镜上镀制相位膜，其主要目的是为了减小屋脊镜内光波的干涉，增加影像锐度。

An approximate formula of the deflection of a local damaged plate is given and can be realized to identify the damaged amount and locality. As an example, the damaged quadrangular plate with quadrilateral simple hinged restrain is analyzed and is given an analogous formula of its deflection.

另外，用有限元结构分析软件对含损伤的四边简支板进行计算的基础上，提出了一种带损伤板的位移等效模型，可以将对损伤位置及损伤程度的物性识别问题转变成对载荷大小及作用位置的构造识别问题进行处理，从而降低识别问题的非线性程度，提高识别能力，简化识别计算。

The approach of computational simulation is the finite element method.The whole research is combined by the following three parts. In part one, a program on quadtree method is compiled. It can automatically generate planar structures with all-quadrangular, good quality elements in high speed, and it can create data files on information of elements and nodes, which provide the foundation for finite element analysis. In part two, a program on finite element calculation is compiled by object-oriented method, During the simulation of fracture, the displacement and stress are calculated by the program.

本文的工作可分为三大部分：第一部分编制了四叉树法程序，通过它可对平面结构进行单元离散，快速自动生成质量较好的全四边形单元，并获得离散后的单元信息和节点信息，为有限元计算打下基础；第二部分利用面向对象方法编制了有限元计算程序，在破坏模拟过程中，利用它进行位移、应力分析；第三部分对脆性材料的破坏过程进行了模拟。

I hope that this success is just the first in a long series.

我希望这只是成功的开始。

Three dimensional stresses on the interface of tire and soil, tire deflection and soil sinkage are measured.

测试轮胎——沙土界面上的三向应力、轮胎变形和沙土沉陷；建立考虑剪切应力对沙土承载特性产生影响的车轮牵引性能预测模型；分析车轮作用下土壤的纵向稳定性。