Liquid crystals were chosen because their strong birefringence provides a simple way to observe their rotation around the laser beam axis.
选择液晶是因为它们强烈的双折射提供了一种简单的方法去观察它们绕着激光光轴的旋转。
When the object is rotating or wiggling, the displacement of Moire fringe indicates the Angle of axis, and the stability of fringe indicates coincidence of the beam axis.
通过试件的旋转或摆动用条纹的移动来反映光束的倾斜，用条纹的稳定性来判断光轴的重合。
By the deflection test, the deflection produced by the deformation of joint field can be gained, accordingly, the change in the included Angle that the beam axis relative tot...
通过挠度测试，可以求出因节点域变形导致梁发生转动而产生的挠度值，进而可以得到梁柱夹角发生的改变量。
And during the cantilever construction of the prestressed concrete continuous rigid frame bridge, the beam axis shape of formed blocks can't be regulated during the subsequent constructions.
而且，在预应力混凝土连续刚构桥悬臂施工过程中，已建成梁段的线形在后期施工中是不可调整的。
In the connection design of steel structure, the shear plate with high-strength bolt connection is extensively used at the flexible joint where the beam is connected to the weak axis of the column.
钢结构节点设计中，梁与柱弱轴方向的柔性连接常采用剪力板高强螺栓连接，螺栓群所承受的荷载有竖向力和偏心力矩。
Since off-axis wander results in images which have astigmatism when the prism is placed in a converging beam, Glan types have slightly better imaging qualities than Nicla types.
因为当棱镜置于会聚光束中时，离轴漂移造成有像散的像，格兰型棱镜的成像质量比尼·科尔型略好。
During pipe line laying or large beam support welding, it often meets crossover of two or multi different axis large diameter pipe piece.
在管道铺设或大型梁架焊接过程中，往往会遇到两个或多个不同轴线的大直径管件相交的情况。
We study the beam paths in uniaxial crystal with arbitarily oriented optical axis in general conditions, by it′s plane and ellipsoid of refraction index and Fresnel law.
从菲涅耳定律出发，利用单轴晶的折射率面和光率体，讨论了在一般情况下单轴晶内部的光路问题。
Cross beam and Axis Z are made of surface-anodized aerometal to improve thermal stability and reduce moving mass for faster setting.
Z轴采用表面阳极化航空铝合金，温度一致性极佳；并降低了运动部件的质量，减少测量机在高速运行时的惯性。
It is shown that the positions of phase saddles and vortices depend on the off-axis parameter, beam width, phase and relative amplitude of beams.
研究表明干涉场中的相位鞍点以及涡旋点的位置与光束的离轴参数、束腰宽度、相位以及相对振幅有关。
The beam member extends along a region of the longitudinal axis and a portion of the beam member is disposed within the inner bore and is spaced apart from the inner surface.
梁元件沿纵向轴线的一区域延伸并且梁元件的一部分被布置在内孔内且与内表面隔开。
The three-member load frame has a plural of derivative types, such as axis partial parallelism, arc column type, arc beam type, and their composite type.
三杆承载机架有许多派生型：如轴线局部平行型、弧线柱型、弧线梁型以及它们的复合型。
On the basis of theories of physics, geometrical optics and photometry, the optical properties of collimated light beam incident upon single fiber perpendicular to the fiber axis are studied.
结合物理学的基本原理和几何光学的基本规律以及光度学的基础理论等三方面，研究了单纤维在平行均匀光束垂轴入射时的光学性质。
On the base of the general theory of thin-walled members, we deduce a new critical moment formula of steel beam under transverse loads which pass the shear center and parallel to the main axis.
就国内现有的薄壁钢梁弯扭失稳理论进行了分析，从薄壁杆件的一般理论出发，推导出荷载过截面弯心并与主轴平行的受弯钢梁的临界弯矩公式。
When a curved beam is bending in the plane of the curvature, the neutral axis of cross section is not identical with the axis of gravity due to the influence of the initial curvature.
由于曲率的影响，曲线梁在其曲率平面内弯曲时的中性轴不通过横截面的形心。因此弯矩在形心处要引起正应力，从而引出所谓“等效轴力”的概念。
It is hard to design for beam expander with high power and wide aperture required, because it is shorten length, larger aperture, as well as on axis and off axis aberration must be corrected properly.
高倍率及大孔径扩束器要求筒长短、口径大、轴上和轴外的像差都要很好地校正，所以光学系统的设计是非常困难的。
It is shown that near diffraction-limited beam qualities could be achieved with optimized off-axis hard-edge unstable resonators.
结果表明：利用优化的离轴硬边非稳腔可以得到近衍射极限的输出。
In this paper are presented the formulas for the self electric and magnetic fields on the axis of a helical electron beam.
本文给出作螺旋线运动的电子束在其轴线上的自生电场与磁场的解析表达式。
Similarly, to position the beam below the boresight axis requires the use of a negative Angle.
同样的，要使波束低于视轴线要求负的角度。
Based on the theory of wide electron beam focusing with curved axis, a method for determining the off-axis point spread distribution is studied using the trajectories with curved axis.
根据曲轴宽电子束聚焦理论，研究了一种用曲轴轨迹确定轴外点扩散分布的方法。
The polarized aberration formed by a reflected beam from an off-axis object point is discussed in this paper, and two kinds of specific cases are analysed.
对轴外点发出的一束光线经界面反射形成的偏振像差进行了研究，并对两种具体情况进行了讨论。
Starting from the Collins formula, the properties of the off-axis Gaussian beam (OAGB) propagating through a paraxial ABCD optical system with an aperture are studied in detail.
基于瑞利衍射积分公式，推导出非傍轴离轴高斯光束相干合成和非相干合成在自由空间中传输的解析公式。
But there is seldom research for the seismic behavior, especially for the beam-to-column weak axis (web) direction connection.
但是对这种节点的抗震性能，尤其是梁柱弱轴(腹板)方向的连接罕有研究。
This paper describes the test method of active multi-beam antenna pattern by using high precision 3-axis antenna test turntable and the test procedure of antenna 3d pattern.
论述了利用高精度三轴天线测试转台，测试有源多波束天线立体方向图的方法。
The central suspension beam is always in axis with the front pier.
中间吊架总是在前墩柱中心线处。
Using geometrical optics theory and off-axis aberration analysis, a set of crossed double strip integrators for high power CO_2 laser beam homogenizing has been designed.
利用几何光学原理和轴外像差理论，设计一种应用于大功率CO_2激光陶瓷烧结实验的反射型正交双带式积分镜均束装置。
Using geometrical optics theory and off-axis aberration analysis, a set of crossed double strip integrators for high power CO_2 laser beam homogenizing has been designed.
利用几何光学原理和轴外像差理论，设计一种应用于大功率CO_2激光陶瓷烧结实验的反射型正交双带式积分镜均束装置。
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