查询词典 optical density

She has long been engaged in researches optical fiber communication, optical burst switching network and data network and optical network integration.

长期从事光纤通信、光突发交换网络以及数据网与光网融合等方面的研究工作。

Of the passive optical fiber network system, the near-end optical fiber line terminal OLT includes data processor, range finding counter, fast bit synchronizer, frame timing generator, etc.; and the far-end optical fiber network unit ONU includes delayer, transmission delaying positioner and data processor.

一种无源光纤网络系统，其中近端光纤线路终端OLT（1）包括：数据处理器（11）、测距计数器（13）、快速比特同步器（14）、帧定时发生器（12）等，远端光纤网络单元ONU（2）包括：延时器（23）、发送延时定位器（24）、数据处理器（21）。

The polarization light used to affect the accuracy of optical test instrument, optical sensor and the quality of optical communication system, the depolarizer can be used to decrease the affection. Different kinds of depolarizer have different applications, so we need select proper kind of depolarizer for special application.

偏振光会对光学仪器测量精度、光通信系统传输质量及传感器精度产生影响，通常可以采用退偏器来减小这种影响，但每种退偏器都有一定的应用范围，要根据不同的应用来设计选择相应的退偏器类型。

Depolarizer can be used to reducepolarization-dependent damage and thus polarization-related problems can be solvedin optical fiber communication systems, measuring instrument and optical fibersensor. PMD emulator is used to mimic PMD behavior of real optical fibertransmission systems, and it is one of the key technologies for solving PMDproblems.

消偏器可以有效地消除偏振损害，解决光纤通信系统、测量仪器及传感器中的偏振相关问题；PMD模拟器用以模拟实际光纤的PMD现象，是解决PMD问题的关键技术之一。

Due to the numerical aperture of DVD pickup is large, and the characteristic size is small, the error of scalar diffraction theory is very large. The in-depth research work on vector diffraction of optical disc was carried out. The optical disk model was analyzed use the rigorous coupled wave theory, and some significative conclusion was obtained. These conclusions can use for guidance of scheme designing of optical pickup.

针对DVD读取头光学系统数值孔径大，光盘特征尺寸小，标量衍射理论误差大等缺点，采用矢量衍射理论对光盘的衍射进行了深入的研究，首次在光学读取头领域中将耦合波理论应用到光盘的衍射分析中，得到了一些有意义的结果，这些结果可以用来指导光学读取头方案的设计。

The detailed analyzed and simulating of focusing error signal of optical pickup based on oblique parallel plate glass was carried out. The new scheme for generating focusing error signal based double reflection plane BSP was proposed. As a result, the structure of optical pickup was simplified, and the cost of optical pickup was reduced. The scheme was not reported in domestic and international literature formerly. Now, author obtained the patent on this scheme.

作者对采用倾斜平板玻璃进行误差信号的提取方案进行了详细的理论分析和模拟，并提出采用双反射面BSP进行聚焦误差信号的提取，该方案可以简化光学读取头的结构，并降低光学读取头的成本，该方案未见国内外报道，目前已经获得专利。

A novel Ni-Cr-Au micro-structure scheme is brought forward after research on the silicon-based non-silicon optical switch. By theoretic and experimental analysis, a Ni-Cr-Au optical switch unit is fabricated successfully. Measuring experiments have been done on the Ni-Cr-Au micromirror for electrostatic driving torsion mirror optical switch.

本文对2D MEMS光开关的关键技术进行了探讨，采用体微加工和表面微加工技术和新型MEMS结构材料，研制出2D MEMS光开关的微镜及其驱动结构，主要研究工作如下：系统地对MEMS技术，尤其是MEMS微加工技术进行了研究，为MEMS器件设计奠定理论基础。

By the optical matrix, the effects have been analyzed quantitativelly, and point out that equivalent length of optical path is the different concept from optical distance.

通过变角度衰减片的光学传播矩阵定量地分析了这些影响，特别提到光路的等效长度与光程是不同的概念，需要分别考虑。

The paper is under the background of "2.5G small form factor pluggable optical transceiver module with digital diagnosis function", which is the project of WuHan huagong genuine optical Technology Co, Ltd. It introduces the constitutes, principle, of the main parts of optical transceiver, introduces the performance and design technology of these integrate circuit which be used in the project.

本文以武汉华工正源光子技术有限公司"2.5G带数字诊断功能的小封装光模块"项目的研究为背景，深入介绍了光收发模块的组成与各主要部分的工作原理，详细介绍了课题中采用的各款芯片的性能与设计技术。

Mach-Zehnder Optical fiber space interferometer is an optical instrument in which the traditional optical interferometer arms are substituted by two fibers. It uses a visible light, and the interference of beams from fibers will be observed in the screen.

光纤Mach-Zehnder干涉仪是利用光纤代替常规M-Z干涉仪传输光路的一种仪器，使用在可见波段，由光纤出射的光在空间进行干涉，在干涉屏上出现可见的干涉条纹。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。