利用激光光测弹性法分析复合材料硬化成形条件对残留应力影响的评价

本研究应用激光光测弹性法,探讨了复合材料硬化成形条件(硬化温度、冷却时间、硬化时间对基体与增强纤维间界面近旁所发生残留应力的影响、并应用图像处理的方法、以提高测试结果的精度。测试结果表明,冷却时间和硬化时间对复合材料界面应力变化没有明显的影响;而硬化温度对复合材料界面应力变化有明显影响。     

Neutral dissociation of methane in the ultra-fast laser pulse

Neutral fragments of methane were performed using femetosecond laser at an intensity of 10^（13-14） W/cm^2. A new mechanism of neutral dissociation is proposed in this work. The methane molecule is excited to super-excited states, in which it would dissociate into neutral fragments. We made Morse type potential energy surfaces for the super-excited molecules. Furthermore, we investigated the dissociation dynamics of the super-excited states by using quasi-claseical trajectory （QCT） method. The results thus interpret the neutral dissociation of the methane molecule in the ultra-fast laser pulse.     

氮分子激光器放电电路分析

本文详细分析了氮分子激光器放电电路,指出了影响激光器寿命的因素,并比较了3种不同β=C_1/C_2值时激光器的放电电流,为设计激光器放电回路提供了理论基础。     

紫外激光诱导Mn2（CO）10的气相光解离沉积动力学

采用石英晶体微量秤技术研究了紫外激光诱导的Ｍｎ２（ＣＯ）１０气相光解离沉积反应，发现Ｎｎ２（ＣＯ）１０气相母体分子浓度，激光能量密度与光解离沉积速度均呈线性关系。     

菲涅耳菱体的入射角效应

利用全内反射相变方程，阐述了斜入射相位延迟原理，分析了菲涅耳菱体相位延迟随其入射角变化的规律性。结果表明：当光束非严格准直时，光的入射角对相位延迟量有明显的影响，并从理论上定量给出了单一波长的光连续入射时入射角随波长变化而变化的计算公式，作出了i-λ关系曲线，从而为延迟器件的调整和正确使用提供理论依据，满足精确测量及智能调控的需求，     

铝靶表面及附近空气光学击穿研究

该文分析了调Q激光引诱铝靶表面及附近空气光学击穿的物理机理,并利用马赫干涉仪和光学延迟装置探测了在这一过程中产生的等离子体和冲击波,获得了序列多幅的等离子体及冲击波产生和发展的马赫干涉图,并讨论了靶表面空气击穿的起因。     

激光场与多层高反膜系相互作用机理

从理论上阐述了激光在多层高反膜系中的场分布,并就提高膜系抗激光损伤阈值进行了讨论。     

一种合成分子局域模振动态的新方法

在两激光场与三能级分子相互作用系统中，调制光场的振幅和位相，合成了分子的局域模振动态，并讨论了分子的动力学规律     

Choroidal vascular repair: Scanning and transmission electron microscopy

Repair of the choroidal vasculature following laser photocoagulation in the rat was examined with vascular casts and correlated with observations on thin-sections. The regenerative process began at the periphery of the damaged area, starting from the surviving choriocapillaris and venules, and proceeding towards the center by means of recanalization of damaged vessels and growth of new ones. In small healed lesions the capillary bed was re-formed. It resembled the adjacent undamaged choriocapillaris morphologically but appeared to be less dense than the intact choriocapillaris when examined by scanning microscopy. In large lesions the capillary bed was re-formed at the periphery but not at the center. Also present at the edges of the large lesions were groups of new vessels which, when observed by scanning microscopy, appeared to extend in two directions; towards the subretinal space and towards the choroidal network. Another aspect of the repair process was the simultaneous occurrence of new vessel growth and capillary regression, which was observed both at the level of the choriocapillaris and at the foci of new vessels