查询词典 optical cable

The market share of its optical transmission system and optical cable products have been in the front rank of the domestic manufacturers and the occupancies of its optical active and passive devices in the home market have been in the first place.

烽火科技集团继承和光大了武汉邮科院在光通信领域的深厚技术背景，并在市场营销和产业化能力上实现跨越式增长，光传输系统设备和光缆产品的市场份额均位居中国制造商前列，光无源器件和有源器件产品的中国市场占有率双双名列第一。

Optical attenuator is an important optical passive component, wide used in optical communication, especially in All Optical Networks.

光衰减器是一种广泛应用的重要的光通信无源器件，尤其是在全光网络中有着重要的应用。

First, the article analyses the current situation of the Wide Band transmission optical network of Metro and put forward its target of next development. And it continues to talk about the key technology of the Wide Band transmission optical network of Metro: optical caber, MSTP, DWDM, RPR and make comparison with them. It offers the general plan of construction of the Wide Band transmission optical network of Metro.

首先，本文分析了目前宽带城域光传送网的现状，提出了下一代城域光传送网的发展目标，论述了城域光传送网中的主要关键技术：光纤直连、多业务传送平台、城域波分、弹性分组环，并对这几种技术进行了对比分析，提出了宽带城域光传送网总体建设方案。

That is: the optical fibers which are to be tested will wind the same circle according to different radius or will wind the different optical fibers circles according to the same radius, making the direction of incident ray side vibration as parameter, we have done the specific experiments and theory analysis to winding waste of quartz system, both refraction optical fibers and Elastic-optic effect of optical fiber.

即把待测光纤以不同的半径缠绕成相同的光纤圈和以相同的半径下缠绕成不同的光纤圈，以入射线偏振光方向为参数，对单模石英系双折射光纤的弯曲损耗与光纤的弹光效应进行了的具体的实验和理论分析。

In order to measure accurately the refractive index of optical glass to improve the imaging quality of optical systems,several measuring methods of refractive index for optical glass were analyzed and both foreign and domestic development situations for optical glass measurement were introduced.

为准确测量光学玻璃的折射率，提高光学系统成像质量，介绍了现有光学玻璃折射率测试方法和国内外发展现状，提出了一种利用测量棱镜3个顶角所对应的3个最小偏向角的折射率测量新方法。

We expect it will benefit the industry field to break through the optical measuring limits at present by offering some new ideas. Optical measuring research based on moire interferometry has developed for several decades. The main idea of this research is to utilize the moire effect caused by two superimposed gratings of identical or similar spatial frequency. One is the reference grating and it is a virtual grating created by a computer program in this research; The other grating is the image of grating projected on the measured surface by the DLP projector, and this grating will distort because of the different sloped profile of the surface. To superimpose the program-created grating and the captured distorted grating will derive the so-called moire effect. This research combined the basic theory of optical interferometry and moire effect to project the different phases of the projected grating fringes by the phase-shifting method and compute the principal value of arguments between -π,π. In the end, the phase unwrapping program based on discrete Fourier transform of solving PDEs is used to unwrap the phase of the measured surface, and finally the surface profile is derived by the optical measuring system.

以叠纹干涉术为基础的光学检测研究之发展早已行之有年，而在本研究中所采用的投影叠纹法(Projection moiré)之主要精神在於藉由两道空间频率相近或相同的光栅相互叠加而成的效应，其中一道为参考光栅，而本研究中的参考光栅是以程式产生可调整不同空间频率的虚拟光栅；另一道则为投影至待测物表面的光栅影像，而在起伏高度不一的待测表面上的光栅影像会受到待测物表面起伏状况不同而在观测方向产生光栅投影条纹影像的歪曲变形，将电脑产生的参考光栅与由影像撷取装置所获取投影於待测物表面的光栅影像作叠合，便会产生所谓的叠纹效应；利用基本的光学干涉理论与叠纹效应结合，本研究中以相移法来改变投影於待测表面的光栅相位，再以相移法的理论反运算出在带有待测面各点高度资讯之介於-π，π相位主幅角，再以离散傅立叶转换解偏微分方程的相位重建程式还原待测面的相位值，以得知待测面之表面轮廓。

The Ethernet optical network can offer Gbps data rate to correspond to multi-media communication. Besides, it was adopted point to multipoint optical network structure to avoid a large of optical fiber's use in point to point optical network structure as presented before.

乙太被动光纤网路单元除了可以提供Gbps的资料速度去符合多媒体的传输外，它也改良了以往光纤通讯点对点的资料传送方式，而改采点对多点的传送方式来避免光纤使用上的浪费。

The temperature gradient occurs imperatively and then influences to the image quality and resolution of the space camera. Based on the theory of optical wavefront error and combining the engineering practice, the thermal optical evaluation has been done to the optical window with non symmetric temperature field. The RMS wavefront errors of the optical window have been calculated on each typical position in orbit cycle.

文中结合工程实际，以光学波像差的基本理论为基础对空间相机光学窗口的非轴对称温度场进行了热光学评价，编程计算了空间相机光学窗口在一个轨道周期内各典型位置处的均方根波像差，并把计算结果与美国"天空实验室"光学窗口的相应数据进行比较，以验证本文热光学分析的合理性、正确性。

Phase shifting interferometry has been widely used and accepted as a fast and accurate non-contact metrology tool. It is widely used to test optical element, optical system, and to detect optical surface and some physical parameter(such as temperature field, density field) related with optical path difference.

移相干涉术作为快速、非接触的精密测量手段，已经广泛地应用于光学零件、光学系统、精密表面的检测和其它与光程差参数相关的物理量的测量。

The small hole of the optical inducer of the traditional second-generation optical mouse used for receiving the images faces downwards, and corresponding light sources (including photoelectric diode and laser diode), optic lens and photosensitive holes are arranged at the lower part of the mouse; therefore, moving the whole mouse is a relatively convenient method for generating displacement of the mouse pointer; oppositely, the small hole of the optical inducer used for receiving the images faces upwards and corresponding light sources, optical lens and photosensitive holes (7) are arranged at the upper part of the mouse; matters on the upper surface of the photosensitive hole (7) can be moved so as to lead the mouse pointer to generate the displacement, while the moving signal transmitted by a photoelectric conversion device must be reset so as to comply with the integrated mouse of the invention.

传统的第二代光电鼠标的光学感应器接收图象的小孔是向下的，对应的光源(包括光电二极管，激光二极管)、光学透镜和感光孔都是在鼠标下部分，这样要想鼠标指针产生位移较方便的方法就是移动整个鼠标；相反，光学感应器接受图象的小孔向上，对应的光源、光学透镜和感光孔(7)在鼠标上部分，要使鼠标指针产生位移就只需移动附在感光孔(7)上面的物质，但必须重新设置光电转换装置传出的移动信号，以符合本发明。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。