圆锥曲线的光学性质及其应用

本文用实例来证明圆锥曲线的光学性质，并通过对椭圆、双曲线、抛物线的光学性质在实际生活中的应用来说明圆锥曲线的应用。     

Synthesis, Characterization and Photoluminescence of Well-Ordered ZnO Micropillars Grown on ZnO Buffer Layers

Using ZnO buffer layers prepared by simply thermal oxidation of ion beam sputtered Zn films, highly oriented and uniformly aligned single-crystalline ZnO micropillars arrays have been synthesized by thermal evaporation of Zn powder with flee catalysts at low temperature of 430℃ The ZnO micropillars show sharp hexagonal umbrella-like tips with thin ZnO nanowire grown on the tips. The umbrella-like tips grow in a layer-by-layer mode along the direction of [001]. The growth mechanism has been discussed. The formation of the micropillars basically depends on the gradually decreasing Zn vapor pressure and subsequently cooling process. The photoluminescence （PL） spectrum indicates a moderately good crystal quality of the ZnO micropillars. Our results may reinforce the understanding of the formation mechanism of different ZnO nano/microstructures. This kind of complex microstructures may find potential applications in multifunctional microdevices, optoelectronic and field emission devices.     

一种自动数字屈光度仪的光学系统原理研究

通过对国外几种自动数字屈光度仪的研究和分析,提出了一种数字屈光度仪的光学原理,推导出眼镜片屈光度的计算公式,为我国数字屈光度仪产品的进一步研发奠定了基础.     

Application of NIR spectroscopy for firmness evaluation of peaches

The use of near infrared （NIR） spectroscopy was proved to be a useful tool for quality analysis of fruits. A bifurcated fiber type NIR spectrometer, with a detection range of 800-2500 nm by InGaAs detector, was used to evaluate the firmness of peaches. Anisotropy of NIR spectra and firmness of peaches in relation to detecting positions of different parts （including three latitudes and three longitudes） were investigated. Both spectra absorbency and firmness of peach were influenced by longitudes （i, ii, iii） and latitudes （A, B, C）. For modeling, two thirds of the samples were used as the calibration set and the remaining one third were used as the validation or prediction set. Partial least square regression （PLSR） models for different longitude and latitude spectra and for the whole fruit show that collecting several NIR spectra from different longitudes and latitudes of a fruit for NIR calibration modeling can improve the modeling performance. In addition, proper spectra pretreatments like scattering correction or derivative also can enhance the modeling performance. The best results obtained in this study were from the holistic model with multiplicative scattering correction （MSC） pretreatment, with correlation coefficient of cross-validation γcv=0.864, root mean square error of cross-validation RMSECV=6.71 N, correlation coefficient of calibration r=0.948, root mean square error of calibration RMSEC=4.21 N and root mean square error of prediction RMSEP=5.42 N. The results of this study are useful for further research and application that when applying NIR spectroscopy for objectives with anisotropic differences, spectra and quality indices are necessarily measured from several parts of each object to improve the modeling performance.     

掺钕激光材料制作光波导研究进展

详细介绍了国外的科研机构在用掺钕激光材料制作光波导方面进行的研究工作。重点介绍了制作光波导所采用的工艺和材料,以及所取得的实验结果。总结了国内在该领域取得的进展,并进行了展望。     

0.2μm聚焦离子束系统中电源稳定度的研究

为了在所研制的二级透镜聚焦离子束系统中获得直径小于０．２μｍ的稳定束斑，并进行亚微米微细加工，分析了影响束斑大小及稳定性的因素，并着重从像差、散焦和漂移的角度，利用理论分析和模拟计算，研究了决定系统光学性能的离子源、离子引出极、预聚焦极、聚焦极所用高压电源及电对中、消像散透镜、偏转器所用低压电源的稳定度对离子束径的影响，得到了束直径小于０．２μｍ时电源必须达到的稳定度，即高压电源的纹波系数１×１０－４～１×１０－５，低压电源的纹波系数６×１０－４～１×１０－４。     

光学技术在警用装备中的应用

文章介绍了激光技术、微光夜视技术、红外技术和强闪光技术的作用机理及在警用装备中的应用,这对我们全面了解警用光学装备的作用机理及使用现状具有重要意义。     

四角结构CdSe纳米材料的光学稳定性研究

通过研究不同生长过程和后处理过程的四角状CdSe材料的光学性质，讨论了四角状CdSe纳米材料生长过程及其在外界条件下的光学稳定性，通过讨论生长时间对四角状CdSe纳米材料的光学性质的影响，说明了形成稳定的四角状CdSe与材料应用间的关系，而研究脉冲激发下的四角状CdSe的类激射的荧光峰说明在有机物中进行的化学合成的纳米材料具有一定的光学不稳定性，最后讨论了一定温度下较长时间退火对四角状CdSe纳米材料光学性质的影响。     

国内首台完全自主知识产权“光刻机”合肥面世

日前，中国科大潘建伟教授领导的研究小组，在国际上首次实现了Shot量子分解算法，其研究成果发表在12月19日出版的美国权威物理学期刊《物理评论快报》上，这标志着我国光学量子计算研究达到了国际领先水平。     

第6届光通信和无线通信国际会议印象

第6届光通信和无线通信学术会议暨展览会（APOC2006），于2006年9月3-7日在韩国光州金大中国际会议中心举行。此次会议由国际光学工程学会（SPIE），韩国光学学会、中国光学学会等共同承办，是继美国OFC（Optical Fiber Comtnunications）、欧洲ECOC（European Conference of Optical Communications）之后的全球第三大光通信行业国际会议，自2001年开始，该会议先后在中国的北京、上海、武汉及韩国的光州举行。