光源

Light-emitting diode is a compound semiconductor device. In optical radiometry and calibration, LED has good performance of high luminance, energy-cost savings and long life.

发光二极管（LED是一种半导体固体发光器件，在可见-近红外波段的光辐射测量和光电探测器的定标中，显示出高辐射亮度、高电光转换效率、可组合调配光谱分布、发光性能稳定等独特优点，可作为辐射度学、光度学和色度学研究的新型参考光源。

One slightly concave cylindrical lens combination is used to change one laser beam into small sector in small angle, and one reflector projects the laser beam to prism driven by a motor to rotate in high speed to produce one reciprocating and scanning small sector plane.

采用微凹柱面透镜组将激光光源发射的一束激光拉成具有微小夹角的小扇面，利用反射镜将此激光束透射到由电机驱动的高速旋转多面棱体上，使激光束产生一个小扇形往复激光扫描光平面。

The effects of concent of catalyst, pH value and lamp-house on the catalytic oxidation were investigated.

考察了催化剂的用量、pH值及不同光源对降解作用的影响。

According to the principle and composition of machine vision and the specific requirements of voice diaphragm concentricity measure system, and based on analyzed the features of voice diaphragm , proper camera, lens, lighting manner, light source and background were chosen to form and realize the vision system of the system.

根据机器视觉的原理、构成和同心度测量系统的具体要求，在分析了音膜的特征的基础上，选择合适的摄像机、镜头、照明方式、光源和背景构建并实现了音膜同心度测量系统的视觉系统。

But, because of the complexity of the dye molecule, there has been short of detailed comprehension in its photocatalytic degradation process. The key problem is difficult to detect the intermediates clearly. In this paper, the photocatalytic degradation of azo dye Congo red in water solution was investigated on UV irradiating TiO2 in the homemade reactor. The optimization conditions were determined and then the rate of decolorization, COD decrease, yield of CO2 and varies pH of aqueous solution during illumination were detected; The varies of the possible intermediates during degradation process were monitored with UV-VIS spectrum and HPLC. The possible mechanism of Congo red photocatalytic degradation is discussed combined with the data of MS.

本文选择有代表性的常见偶氮染料—刚果红作为研究对象，以自制TiO2为催化剂和小功率紫外灯为光源，在自制光反应器上确定了光催化降解的优化条件，并在这个优化条件下测定了降解过程中的脱色率、COD去除率和CO2生成量；利用数显酸度计、紫外可见分光光度计和高效液相色谱仪跟踪测定了降解过程中的可能产物，并结合质谱的数据初步探讨了刚果红的可能降解机制。

The first disadvantage of MMI device is wavelength sensitive, which leads to restricted applications. To reduce the wavelength insensitivity in optical network applications, the demand of light source with a specific wavelength is needed, especially for power splitters. For this reason, a wideband criterion for MMI splitter is proposed. The basic principle is based on reducing the interference length difference and making it shorter than the spot size for constructive mode interference. Simulation results show the spectra of proposed MMI splitter is wide enough (1.26-1.61um) to cover the fiber communication band and the size of the splitter is more compact than that of the conventional MMI or Y-branch splitter.

多模干涉元件的第一个缺点为波长敏感，此缺点会限制其在实际上的用途；因元件在网路上的应用时，通常都需要降低波长敏感性，以减低对光源波长准确性的要求；有鉴於此，本论文提出多模干涉分光器的宽频标准；基本原理是建立在缩短其多模干涉区的长度差，并使之小於建设性干涉的光点大小；透过模拟后发现，操作频宽可涵盖光纤通信全波段(1.26-1.61um)，且长度小於Y形分支结构的分光器。

The AXD series is a group of high-brightness point light sources having a continuous spectrum similar to that of the sunlight .

短弧氙灯：该产品是一种高亮度的点光源，具有像阳光一样的连续光谱。

With the development of laser techniques , 1.5μm high power continuous wave single-frequency laser has been used for scientific research and other fields.

随着激光技术的发展，1.5μm高功率连续单频激光光源被广泛应用于生产、科研等各个领域。

W It reduces "flare" or "hot spots" so typical of reflection from white or bright surfaces when the light conditions are very sunny/contrasty.

w 当光源很强或对比度强的时候，它可以减少白色或亮色反光造成的亮点

Influence of the convergence angle on light transporting in biological tissues.

光源会聚角对生物组织光传输问题的影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。