By analyzing the diffraction properties of sub - micron gratings , it is summarized that sub - micron gratings can realize the function of light - guiding by controlling the period of gratings and the angle of incident light . the properties are the theory base of the designing light guide plate 通过对亚微米光栅衍射特性的分析,总结出只要控制光栅周期及入射光的角度,亚微米光栅就具有实现光波导的功能,为利用亚微米光栅制作导光板提供理论基础。
The formula to calculate the light splitting ratio of intensity compensation with light splitter is derived out . two kinds of circumstances are discussed in detail , the one is laser polarization changing while the intensity keeping stable , and the other is the intensity changing with the polarization 用能量流分析法推导了用分光镜分光进行强度补偿的分光比计算公式，详细讨论了入射光的强度不变而偏振方向变化以及二者同时变化对分光比的影响。
Second , we have proposed a reflective and coaxial configuration , in which the ultrasound beam and the incident laser are kept in the same axis direction . then a 1mhz ultrasound beam is focused into the simulating media to modulate and tag the scattering laser light passing through the ultrasonic focused zone 并且在综合国内外各小组的实验技术的优点的基础上，创造性地提出声光同轴反射式方案，即超声和入射光同轴，并和探测器在同一方向上。
At the different recording angles , the raman - nath diffraction and bragg diffraction phenomenon are observed , respectively . then , the wavelength selectivity and the relationship of diffraction efficiency and polarization state are discussed when the recording angle of 60 ? formed by two writing beam 分别观察到了写入光束夹角不同时光栅的拉曼-奈斯衍射和布拉格衍射现象，并对双光束夹角为60时写入光栅的波长选择性及衍射效率与入射光偏振态的关系进行讨论。
The first section includes the theoretical and numerical analysis for diffractive optics elements and the second one gives the results of the fabrication experiments of diffractive optics elements . in the first section , we analyzed the antireflection of the diffraction optics elements . binary optics processing methods may be applied to a glass or silicon substrate to generate an array of small columns in order to enhance transmission 在理论分析的部分，本论文完成的主要工作是用耦合波理论分析了在玻璃或硅基底上制作具有亚波长结构的圆柱形网格阵列以实现对入射光的增透作用，为此而编写的程序实际上也可以用来分析计算单位周期内具有任意面形的网格光栅的电磁场衍射特性。
The main contents and contributions include : ( 1 ) it has been proposed to uniform the temperature distribution through space modulating the intensity incident on the surface of substrate using a mask the emphasis of this method is to find the laser intensity distribution that can realize the temperature uniformity . the results show that when the mean temperature rise in the processed area is 500 k , the maximum temperature difference is 3 . 5 k , which can meet the accurancy requirement of temperature uniformity 计算结果表明,采用四环带结构的掩膜板对入射光进行调制,在0 . 2倍光斑半径区域内平均温升达到500k时,最大温差只有3 . 5k ( 0 . 4倍半径处仅有4 . 5k左右) ,可以在激光微细加工区域得到比较满意的温度分布。
On this basis , a model of pulse damage threshold fth ( j / cm2 ) was proposed . calculations on pulses of three different envelope shapes indicate that , with the same pulse duration , wavelength and incident light intensity , fth of pulse with gaussian envelope is higher that that of the pulses with hyperbolic secant and lorentzian envelope , i . e . gaussian pulse would need a little higher intensity to induce breakdown than the other two 在这个基础上，提出了一个研究脉冲破坏闭值的模型，对三种不同包络脉冲的分析表明，在相同的脉宽、波长和入射光强下，高斯脉冲的破坏闭值较高，双曲正割和洛仑兹脉冲的破坏闽值相对较低，即高斯脉冲最不容易对介质造成破坏。
By solving the equation numerically , the effects of diffusion on the property of the self - deflection of the photorefractive solitons are studied . the results show that the spatial shifts of bright screening solitons and sp solitons depend directly on the voltage factor . for dark solitons , the stronger the input intensity is , the larger the bending - angle is , whereas bright solitons depend on the input intensity nonlinearly 在考虑一阶扩散效应后，通过数值计算分析和比较了三种光折变空间孤子的自偏转特性，得出屏蔽和屏蔽光伏明孤子的偏转量与分压系数成近似线性关系，与入射光强成非线性关系，而暗孤子偏转量随入射光强的增加而增加。
Tn order to eliminatc the error caused hylight power drift of incident light , we adopt the method of the ration of scattering light to measure the concentration of protein in milk . that is to measure 90 " scattering light intensity and 0 " transmitting light intensity in the light incident plane . the ratio of them is to be used to express measured optical parameter 由于牛乳蛋白质的测量精度要求很高，为了消除因入射光的光功率漂移而引起的误差，我们采用散透比法来测量牛乳蛋白质的含量，即在光的入射平面内同时90处的散射光光强is和测量0处的透射光光强it ，用它们的比值来表征测试牛乳蛋白质含量的光学参量。
Taking no account of the non - uniformity of the detector , this paper analyzed the performance of the traditional four - quadrant angle - measurement algorithm and two other algorithms in calculating the pitch angle and the deflection angle of the incident ray , and also compared the error curve of the pitch angle calculated by each algorithm in the full plane 摘要在不考虑探测器非均匀性影响的情况下，本文分析了传统四象限测角算法和另外几种算法在计算入射光的俯仰角和偏转角时的性能，还比较了在整个平面内各个算法得到的俯仰角的误差曲面。
