光束

Such lensed fiber tip corrects for the phase front mismatch between the curved laser beam wave front and the planar fiber beam.

本文研究的透镜光纤主要是楔形柱透镜光纤，它的作用是修正激光光束波前和从光纤出来光束之间的相位失配。

As compared with aberration-free super-Gaussian beams, the profile of spherically aberrated super-Gaussian beams can be leptokurtic, mesokurtic or platykurtic, depending on the aberration and propagation distance.

从能量集中度的角四川大学博士学位论文度来衡量，正球差使得光束质量降低，而合适参数的负球差透镜使得光束质量得到改善。

Analyze the gain spectrum of modulation instability under specific nonlinear responds. We take logarithmically nonlinear medium as an example to discuss MI gain spectrum of coherent and incoherent beams both.

一、我们在微扰近似下，分析了介质的非线性响应形式对调制非稳增益的影响，以对数型非线性介质为例分别讨论了相干光束和非相干光束的调制非稳性。

We have proved experimentally and theoretically that OBNC PM is more interesting than collinear PM in OPA and OPO due to its two characteristics: noncriticality for the noncritical beam and collinearity of the propagation directions of energy of the noncritical beam and pump beam in the crystal.

OBNC过程中作用光波中的一个光束与所产生谐波光束是非临界的，并且它们的能量流方向是一致的；OBNC具有很大的容限角，而其匹配条件比共线匹配过程宽容得多，从而可以使现有的多种非线性光学晶体通过OBNC获得比共线情况更有效的非线性作用。

The nonspiral phase plate introduces phase singularity to the incident beam, and the spiral one adjusts the radial phase distribution.

非螺旋相位片将一个光漩涡引入高斯光束，螺旋相位片调节光束径向波前相位分布。

This paper gives a design to measure the vibration with photogrammetric survey,and at the same time,the method of bundle adjustment is applied to modify the position of targets.

因此设计了非接触的摄影测量方案，并提出了采用光束平差法来修正目标点位置坐标，并且在某些相机参数可能发生变化的情况下，采用光束平差的方法来修正相机的外参数，大大提高了本方案的鲁棒性能。

The light detecting machine detects the second scan beam of the first scan beam at the specifical points.

光检测机构检测在特定点检测包括在第一多个扫描光束中的第二多个扫描光束。

In order to depress the gas thermal effects on laser propagation,it should be considered to minimize the superposed areas in beam path.

因此，为抑制气体热效应对光束的影响，在考虑其它因素的同时，应尽可能减小光路中的光束交叠区域。

In addition,the unhomogeneous distribution of atmospheric density leads to refraction of ladar signals propagation,and turbulence in the atmosphere results in energy fluctuation in the cross-section,spread and drift of beams.

另外 ，由于大气密度分布不均匀导致激光沿光路上的折射，大气湍流效应导致光束横截面上能量分布起伏、光束扩展和漂移等，这些对激光雷光信号的传输产生一定的影响。

While a lens takes scattered beams of light and focuses them into a cone or ray it them projects on to film, a pinhole works by allowing such a small aperture that the beam coming in is quite small, and therefore remains relatively unscattered.

虽然镜头采取分散光束和重点成圆锥或射线是他们的项目，以电影，一个针孔的作品，让这样一个小孔径的光束将在相当小，因此仍相对

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐