计算机模拟显示棱镜的三维动态物像关系

在对棱镜物像共轭关系实质分析的基础上，提出了棱镜动态三维成像特性的计算机模拟显示的方案，并用ＢｏｒｌａｎｄＣ语言编制了相应的软件，说明此方法既有利于教学的直观，又方便了科研和生产中对棱镜的分析。     

五角棱镜光束转向波前误差的分析与检测

从分析五角棱镜的角度制造误差产生的光学平行差入手,建立起五角棱镜的光输出平面波前与运动误差和角度制造误差产生的扫描激光束转向的波前改变量之间的关系.采用渥拉斯顿棱镜型双频激光干涉仪实时测量五角棱镜的运动误差,即可计算出扫描激光束转向的波前误差,以便在大型望远系统波前测量时对此误差加以修正.     

小型棱镜摄谱仪的应用

利用小型棱镜摄谱仪看谱系统对汞光谱进行谱线的测量,给出较为完整的汞光谱,使学生在实验中有较为明确的依据.     

用ZEMAX模拟五棱镜误差对平行度检测的影响

介绍了用五棱镜法检测大口径光束平行度的原理。分析了五棱镜加工的角度误差及面形误差对检测结果的影响，得出了五棱镜角度误差不影响检测结果，2个折射面的面形误差对检测结果的影响较小，2个反射面的面形误差对检测结果影响最大的结论。介绍了选择五棱镜的方法和减小面形误差影响的方法。最后，给出了用五棱镜法检测单星模拟器出射光束平行度的应用实例。     

Microtopographical studies of prism faces of potassium dihydrogen phosphate crystals

Surface structures on prism faces of potassium dihydrogen phosphate crystals grown from aqueous solutions and also by gel method are described and illustrated. Density of growth centres increases as the supersaturation of the mother liquor is increased. Gel grown crystals predominantly show rectangular growth hillocks on their prism faces. In the needle shaped crystals further nucleation extends predominantly along theC axis than at right angles to it. Influence of misoriented guest microcrystals on the growth of the prism faces is described.     

渥拉斯顿棱镜在不同方式组合下的光路特性分析

分析了具有相同结构角的两个渥拉斯顿棱镜在不同方式组合下的光路特性。给出了分束角与结构角的关系表达式,同时也给出了分束角与结构角的关系曲线。使用He Ne激光器(波长λ=633nm)对两个结构角S=27°的渥拉斯顿棱镜在四种不同组合方式下的光路进行了测试。结果表明,测试结果与理论计算完全相符。     

棱镜夹具设计

阐述了夹具设计的意义和加工方法的选择原则。介绍了夹具上盘的加工方法和对夹具设计的要求 ,并通过对半五角棱镜和斯米特屋脊棱镜的夹具设计实例 ,讨论了一般夹具的设计思想、依据和步聚     

Ion Optical Methods - Means to Improve Performance of Mass Spectrometers Designed for Isotopic or Chemical Analysis

Abstract

To improve performances of mass spectrometers dedicated to isotopic or chemical analysis, the methods of the ion optics are to be used. To apply the transfer matrix method of ion optics in mass spectrometer design, the matrix elements of various mass analyzers as Wien filters and crossed field sectors, of energy analyzers as electric prisms, were presented. These elements result from ion trajectory calculations representing solutions of the Euler–Lagrange equations. The basic parameters of an unconventional double focusing mass spectrometer were calculated and compared with those of classical design instruments.     

Synthesis and properties of ZnO hexagonal prisms synthesized on MgO-coated Si (111) substrates

ZnO hexagonal prisms have grown on MgO-coated Si (111) substrates by chemical vapor deposition. The process has two steps : the preparation of MgO-coated Si (111) substrates and the preparation of uniform ZnO hexagonal prisms. Some nucleation sites are provided on the Si substrates by the MgO layers, which have the capability to improve the growth of ZnO prisms in the heteroepitaxy. The prisms are single crystals with a preferential growth along the c axis and they are well-faceted at both the end and side surfaces. Room-temperature photoluminescence measurement of these ZnO prisms have shown a strong ultraviolet (UV) emission band centered at 393 nm and a weak green emission band centered at 507 nm, which may be provide an improvement in novel ultraviolet light-emitting devices. In addition, a possible mechanism for the prism growth is proposed based on the analysis by electron microscopy.     

焊接结构应力场计算中的一类五面体可变节点等参单元

本文应用三维有限元理论，构造了一类五面体６～１５节点等参单元的形函数，提出了在五面体单元内的Ｇａｕｓｓ积分处理方法，建立了相应的单元刚度矩阵。这类单元的节点可以在６～１５之间任意选择。将其与ＳＡＰ５中的六面体８～２１节点等参单元匹配，计算了对接板接头的理论应力集中系数。经与有关文献结果比较表明：这类单元适合于计算焊接结构的应力场，并且具有良好的精度。