Aberration correction of conformal dome based on rotated cylindrical lenses for ultra-wide field of regard

A new compact conformal dome optical system was designed, and the aberration characteristics of the dome were investigated using Zernike aberration theory. The aberrations induced by the conformal dome at different fields of regard(FORs) from 0° to 90° were effectively balanced by a pair of rotating cylindrical lenses. A design method was introduced and the optimization results were analyzed in detail. The results showed that the Zernike aberrations produced by the conformal dome were decreased dramatically. Also, a complete conformal optical system was designed to further illustrate the aberration correction effect of the rotating cylindrical lenses. Using a pair of rotating cylindrical lenses not only provided an ultra-wide FOR, but also perduced a better image quality of the optical system.     

Highly stable two-dimensional graphene oxide:Electronic properties of its periodic structure and optical properties of its nanostructures

According to first principle simulations, we theoretically predict a type of stable single-layer graphene oxide(C_2O).Using density functional theory(DFT), C_2O is found to be a direct gap semiconductor. In addition, we obtain the absorption spectra of the periodic structure of C_2O, which show optical anisotropy. To study the optical properties of C_2O nanostructures, time-dependent density functional theory(TDDFT) is used. The C_2O nanostructure has a strong absorption near 7 eV when the incident light polarizes along the armchair-edge. Besides, we find that the optical properties can be controlled by the edge configuration and the size of the C_2O nanostructure. With the elongation strain increasing, the range of light absorption becomes wider and there is a red shift of absorption spectrum.     

走在时代前面的卓越物理学家——李政道

简要论述了李政道对物理学的贡献，介绍了他关于科学与艺术合流的主张以及他关心中国科学与教育事业的动人事迹。     

亥姆霍兹:一位在人类文明史上极为罕见的科学通才

介绍了卓越的物理学大师亥姆霍兹在几乎是全部的科学领域、非同寻常的成才之路,以及在培养和造就科学精英等方面的杰出贡献.     

按范数界限估计的一致有效的渐近展开式

本文对伴有边界摄动的积分微分方程组边值问题的奇摄动,通过对角化技巧,利用逐步逼近法证明了解的存在,从而得到了解的按范数界限估计的一致有效的渐进展开式.     

Au����� Rosselandƽ����͸���ȵļ���

利用考虑l能级分裂的屏蔽氢离子模型(SHML),计算高温(T=200~300eV)、高密度(ρ=1g.cm-3)下纯元素Au、Ho、Gd、Sm、Nd、Sn、Ag的Rosseland平均不透明度,以及Au与这些元素混合后的Rosseland平均不透明度,其结果与DCA/UTA及STA模型计算结果吻合较好。     

物理学的创新精神

物理学的创新精神，在于坚信实验是发展物理学的起点，对新的物理现象提出各种可能的假说，并以对各项诺贝尔奖获得者物理北景的分析作为例证。     

计算拟合离子选择性电极法测定食品中的碘

利用计算机拟合离子选择性电极标准加入法测定食品中的碘,方法简便,灵敏度高,检出限为39.8μg/L。线性范围为1.0×10~2～1.0×10~5μg/L。该法用于海带、食用盐中碘的测定,RSD分别为2.6％、2.9％,平均回收率分别为98％、93％。     

�������������Դ��·������ų���ֵģ��

介绍了一种广泛应用于离子刻蚀、预清洗和离子束辅助镀膜的阳极层离子源的工作原理,分析了磁场对其性能的影响。给出了线性阳极层离子源磁路的设计。采用ANSYS有限元分析软件对线性阳极层离子源的静态电磁场进行了模拟分析,并与实验结果进行了比较,结果令人满意。通过ANSYS编码对电磁场模拟,可为具体的阳极层离子源的改进设计提供指导。