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The photoresponsive properties of the azobenzene polymers are based on the photoinduced fast and reversible isomerization between the trans and cis isomers of azobenzene upon exposure to UV or visible light, which triggers significant changes in the physicochemical properties of polymer materials. Recent years have witnessed a rapidly increasing interest in azo-containing polymers due to their potential in various optical and optoelectronic applications such as optical data storage, liquid-crystal displays, molecular switches, nonlinear optical devices, photomechanical systems and so on.

偶氮分子在光照下能够发生可逆顺反异构，从而引起偶氮聚合物发生分子取向以及构象转变，使得偶氮聚合物具有优越的光学活性，同时偶氮聚合物结合了偶氮单体的光学活性和高分子材料优异的力学性能和加工性能，在光信息存储材料、非线性光学材料、液晶材料等领域都有重要的应用价值。

Nonlinear digital optical switch, optical limiter and optical power stabilizator are proposed and analyzed, which consist of a number of cascaded single-input excitation nonlinear dual-core couplers.

分析了级联单端输入非线性光波导耦合器的输出特性。理论分析表明这类器件具有极好的开关、限幅以及稳定光功率的特性。

In this paper, through the design of the optical system for an infrared automatic dimension sorting machine with high precision, the characteristic, design thought and evaluation method of the optical system, which is a kind of unimaged precision optical equipment applied under workshop conditions, are discussed in detail.

本文通过红外尺寸自动分选仪光学系统的设计，详细地讨论了在车间条件下使用的非成象精密光学装置中光学系统的特点。设计思想及评价方法。

On the basis of the summarization and review on the researches and developments of the third-order optical nonlinear materials, the third-order optical nonlinearities of poly(l,4-phenylene vinylene) derivatives and metalloorganic compounds as well as the optical switching effects of poly(l,4-phenylene vinylene) derivatives are investigated.

在总结和回顾前人对三阶非线性光学材料研究的基础上，合成并研究了聚(1，4-苯亚乙烯)及其衍生物以及金属有机化合物的三阶光学非线性，同时对PPV及其衍生物的光开关特性进行了初步研究。

The requirements of Interference fiber optical gyroscope, optical time domain reflectometer,biomedicine optical coherence tomograph.

讨论了在干涉型光纤陀螺仪、光时域反射计、医学相干检测技术、波分复用技术中对SLD的要求。

Through years of exploration, the company optimize the framework for a huge - and optical centers,a mature logistics system step by step, radiation nationwide sales network and after-sale service, changed the traditional red tape optical methods to reduce the cost of expensive glasses, avouching for optical profession and accuracy.

通过几年的探索，公司逐步构架了庞大的供-配镜中心，成熟的物流体系，辐射全国范围的销售网络与售后保障，改变了传统繁琐的配镜方式，降低了昂贵的配镜费用，做到网上配镜专业、准确！

An optical demodulator and accompanying method that demodulates a DQPSK signal employing a single optical delay interferometer comprising a free-space Michelson interferometer having two optical paths, connected to a 1x2 coupler.

本发明提供了一种光解调器及其所附方法，它采用单个光延迟干涉仪来解调DQPSK信号，单个光延迟干涉仪由与1×2的耦合器相连的具有两条光路的自由空间迈克尔逊干涉仪组成。

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。

Because the length of optical fiber delay lines has direct effects on the volume of laser warning system, the optical loss and the false alarm ratio, the optical fiber delay lines are permuted and combined based on the property of the laser pulse and the optimization theory.

针对光纤延迟线的长度对激光告警器的体积，光学损耗，虚警率等因素有着直接的影响，在此利用激光脉冲的相关特性，通过最优化理论对光纤延迟线进行排列组合，从而解算出光纤总长度的最小值，为激光测向告警器优化设计提供了重要的理论依据。

The theoretical analysis and experimental result show that the experimental setup can realize these functions including optical signal sorting and permuting etc., which also can be used in the fields of optical communication and optical information processing.

结果表明，该实验模块能够完成输入信号光的交换和排序等操作，可应用于光通信和光信息处理中。

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。