光束

Applying matrix optics to paraxial rays, which travel through different optical elements illuminated with high-power Gaussian beams, the positions of ghost image s affected by Kerr-effect-induced nonlinear refractive index of the illuminated optics are studied.

在近轴条件下，利用矩阵光学的方法研究了高功率高斯光束通过不同光学元件时，克尔效应导致的介质折射率的变化对鬼像位置的影响。

This results can be used in the geometrical description for the propagation of a paraxial beam.

利用"嵌入高斯光束"的概念将文献［5］中的结果推广到更为普遍的情形。

It is shown that some important concepts about Gaussian beam in the paraxial theory cannot apply to the off-axis Gaussian wave.

结果表明，傍轴光学关于高斯光束的一些重要论断，对远轴高斯波不再适用。

In this paper,a technique to determine the geometrical properties of fractional Fourier transform of paraxial beams based on the phase space beam transformation matrix is presented.

提出一种分析傍轴光束分数傅里叶变换几何特性的相空间束矩阵变换的简单方法。

The optical matrix under paraxial approximation can make the calculation of optical transmission easy and convenient in designing optical system.

傍轴近似下的光学矩阵理论，可以简化光束传输计算过程，使光学系统设计更为方便。

The influence of paraxial incident Gaussian beam on the beam evolution in nonlocal nonlinear material.

偏离束腰入射对非局域非线性介质中高斯光束演化的影响。

Chapter 2: The vectorial properties of the paraxial beams propagating perpendicular to the optical axis of a uniaxially anisotropic crystal are investigated.

第二章：研究了垂直光轴入射的傍轴光束在单轴晶体中传输的矢量性质。

The beam of light inside the anteroom below cranny lamp becomes hoar light to take, namely Tyndall phenomenon is electropositive, see pelagian inflammation cell.

裂隙灯下前房内的光束成为灰白色光带，即tyndall现象阳性，并可见浮游的炎症细胞。

Generally speaking, a certain diameter of the laser beam penetration depth as the beam power increases.

一般来说，对一定直径的激光束，熔深随着光束功率提高而增加。

Influence of beam turning error of pentagonal prism on wave-front measurement［J］.

五角棱镜的光束转向误差对波前测量的影响［J］。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。