查询词典 optical density

At last,a optical engineering software is introduced to simulate optical scattering in the deep sea water ,and studys the corelation between scattering and relative refractive index,particle density and particle size in the sea water.

最后通过光学工程软件对海水中的散射进行仿真实验，研究散射与海水中粒子密度、粒子大小和相对折射率的关系。

The main work can be summed up as follows: Firstly, we studied the thermal-field properties of VCSELs, and analyzed the influences of current spreading, material parameters and operating conditions on the temperature distributions. Secondly, we began with the electrode voltage and calculated the equipotential s distributions, compared the distributions of voltages and current densities in different depths of VCSELs, and then studied the influences of the oxide-confining region with different position or thickness, and the different sizes of the gain-guided aperture and emitting window on the distributions of the injected current density, carrier concentration and temperature in the active region. Thirdly, we realized the coupling of electricity, optical and thermal-fields, worked out the threshold voltage, calculated the distributions of the injected current density, carrier concentration and temperature under different offset voltages, and analyzed the impacts of temperature profile and carrier density on the refractive index, Fermi levels and optical-field. Finally, we gave the equipotential line distributions with considering N-DBR and double oxidized-confining regions, and analyzed theinfluences of N-DBR and double oxide-confining regions on the distributions of the current density, carrier concentration, temperature and optical-field.

具体工作可以概括如下：首先，研究了VCSEL的热场特性，分析了电流扩展，材料参数和工作条件对于温度分布的影响；其次，从电极电压入手，计算出激光器中的等势线分布，并对不同深度处的电压和电流分布进行比较，研究了高阻区的不同位置和不同厚度、限制层和出射窗口半径的大小对电流密度、载流子浓度和温度分布的影响；再次，实现了电、光、热耦合，求出了阈值电压，计算了不同偏置电压下的电流密度分布、载流子浓度分布和热场分布，分析了温度和载流子浓度变化对折射率、费米能级和光场的影响；最后，给出了考虑N-DBR和双氧化限制层时激光器中的等势线分布，分析了N-DBR和双氧化限制层对VCSEL电流密度、载流子浓度、温度和光场分布的影响。

The high-density optical data storage technologies based on short-wavelength laser source and solid immersion lens are studied with the aim to develop the key technologies of the two optical data storages system.

本课题主要围绕高密度光存储技术中的短波长光存储技术和固体浸没透镜超分辨存储技术展开研究，其目的在于掌握这两种高密度光存储系统中的关键技术。

Solid immersion lens was employed to increase the optical writing density. The position of foci and numerical aperture of the focusing system with SIL were simulated, and the threedimensional optical data storage was conducted.

为进一步提高光存储密度，利用固体侵没透镜与数值孔径为0.55的长工作距离物镜对飞秒激光脉冲进行聚焦，完成了PMMA及石英介质上的存储实验，并对聚焦物镜焦点与SIL底面离焦时的介质内焦点位置和系统的数值孔径进行了模拟。

Because the magneto-optical recording density isin inverse proportion to the square of wavelength,and the GaN-based diode ina blue light range is at the stage of practical usage,it is very important to studythe magneto-optical materials in a blue light range.

由于磁光记录密度反比于光波长的平方，而且目前以GaN为基的蓝光二极管已经实用化，从而研究蓝光波段的磁光材料十分重要，这点是本论文的主要出发点。

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。

This project was established based on the first cooperative development of optical in situ real time detecting technique probing the atomic scale layer-by-layer epitaxy growth of oxide film. Over the last three years, we have given full play to the advantages and characteristics of both sides and have finished the assumptions and plans of this subject satisfactorily. 1. In Institute of Physics, we set up advanced oblique-incidence reflectivity difference equipment and wrote one data acquisition procedure that made the simultaneous detection of optical signal and RHEED signal into reality. 2. The first observation of sustained oscillations over hundreds of monolayers in both real and imaginary signals during the epitaxy growth of SrNb0.1Ti0.9O3 on SrTiO3 substrate in LMBE testifies that oblique-incidence is an excellent method to detect and monitor film epitaxy growth real time. 3. For the first time, we verify that oblique-incidence reflectivity difference method can be used to monitor the layer-by-layer growth mode during continuous growth through the correspondence between optical signals to atomic or molecular step edge density on the growth surface. 4. Phenomenological analysis shows that optical signals comprise three parts, the first is proportional to the average thickness of the film and depends on the bulk phase dielectric response; the second is proportional to the coverage of terraces and depends on the dielectric response of atoms or unit cells in the terrace; the third is proportional to the coverage of step edges and depends on the effective dielectric response of atoms or unit cells at step edges. This makes oblique-incident reflectivity difference technique a quantitative macroscopic method to monitor film growth.

中文摘要：本课题是在合作首次发展了氧化物薄膜原子尺度层状外延生长光学原位实时探测方法的基础上立项的，三年来，我们充分发挥双方的优势和特点，圆满完成了课题的设想和计划。1、在物理所建立了一套先进的光反射差法装置，编写了计算机系统的数据采集程序，实现了两路光学信号和RHEED数据的同步采集和显示。2、用激光分子束外延在SrTiO3基底上生长SrNb0.1Ti0.9O3薄膜，首次观测到连续外延几百个原胞层，周期振荡的光反射差实部和虚部信号，证明了光反射差法是一种能原位实时探测与监控薄膜层状外延生长的好方法。3、首次验证了通过对生长表面原子或分子台阶密度的响应，光反射差法可用于原位实时监测在连续生长条件下薄膜的层式生长模式。4、通过唯象理论的研究，证明光反射差信号由三项组成，第一项只与薄膜的平均厚度和宏观光学电介质常数有关；第二项与分子台阶面覆盖度和台阶面上分子层的光学电介质常数有关；第三项与台阶边缘的覆盖度成正比，并和在台阶边缘的分子的有效光学介电常数有关。

We have calculated the electronic structure and optical properties of zinc blende structure ZnSe under different high pressure by means of plane wave pseudo-potential methodwith generalized gradient approximationin this paper.The total energy,density of state,energy band structure,and optical absorption and reflection properties under high pressure are calculated.Furthermore,we analyzed the change of electron structure,band structure and optical properties under high pressure using the results of experiment and theory

运用密度泛函理论体系下的平面波赝势和广义梯度近似方法，利用第一性原理计算了不同的压强下ZnSe晶体闪锌矿结构，得到了它的平衡晶格常数、总能量、电子态密度分布、能带结构、光反射与吸收系数等性质，具体讨论了高压下ZnSe的电子结构，并且结合实验结果定性地分析了高压下的光学性质。

Third, the physical indicators: transparent liquid or slightly yellow liquid, density (g/cm3): 1.0 ± 0.02, PH = 9.0 ± 0.02 d, the scope of application: optical glass, diamond, mobile glass, liquid crystal display, liquid crystal glass, optical lenses , optical lenses, glass instrument, P3 wash Lilongwe, silicon and so on.

三、物理指标：透明液体或微黄色液体，密度（g/cm3）：1.0±0.02，PH=9.0±0.02 四、适用范围：光学玻璃、水钻、手机玻璃、液晶显示屏、液晶玻璃、光学镜片、光学透镜、仪表玻璃、P3洗利隆、硅片等。

Quantitatively, the optical density of NADPH-d positive neurons in all of the related nuclei was significantly increased in the BDL animals compared with controls. Since NO is thought to be able to increase the motilities of the gallbladder and the sphincter of Oddi in anesthelized rabbits, the elevation of NADPH-d and NOS reactivities is likely to magnify the excitatory effect on the extrahepatic biliary system for the purpose of depletion of the loitered bile juice from the jaundiced liver. These data may also have important implications for the altered state of circulatory, metabolic or regenerative responsiveness under pathological condition.

此现象一来可推测，肝脏在遭受胆管阻塞性黄胆的伤害后，其代谢、血液动态与温度调节作用势必改变、紊乱、甚至失功能，而感觉神经也势必会接受到大量的机械性、化学性、渗透性等感知讯息，所以感觉神经元将一氧化氮制造量提升，有助於感觉讯息的快速传报，以发挥回馈调控的效果；二来可表示，自主神经系统不论是交感或副交感神经，为了因应胆管阻塞所造成肝脏的病变，以增加一氧化氮的制造，意欲刺激肝外胆道系统，排空滞留在肝脏内或胆囊内的胆汁，而达到恢复肝脏内代谢、血液循环、胆汁流动等功能控制的恒定状态。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了