误差因素对微角度传感器性能的影响

叙述了一种基于光学内反射的非接触式角度传感器的设计原理和特点,分析了该角度传感器的关键器件临界角棱镜的参数设计,着重讨论了临界角棱镜的加工误差对系统特性的影响。通过计算和实验发现,通过控制临界角棱镜的入射中心角误差不大于20",两平行反射表面的一致不平行度误差小于30",以及反射表面的平面度优于λ/4可以使该传感器在3 测量范围内获得0.02"的分辨率。     

峰值检读方式下磁光盘系统误码特性与检偏方式的关系

分析了在峰值检读方式下磁光存储系统产生误码的原因．并考虑多种定时误差的存在，导出了描述信道误码特性的数学模型．在此基础上分析了磁光信号检偏方式与信道误码特性的关系，分析结果表明平衡差分信道的容错能力略高于非平衡差分信道．     

非均匀流水面曲线自动计算及绘图

叙述用分段求和法编程计算棱柱体、非棱柱体明渠及天然河道水面曲线并绘制CAD图形的思路及过程，并以工程的实际应用加以检验。     

一种新型偏振分光棱镜的设计和应用

一种新型的偏振分光棱镜结构,实现了将偏振态相互垂直的光以不同的角度输入后合为一 束的功能,尤其能与双光纤准直器配合使用。通过计算说明二者角度可相互匹配,并分析了在准直器的角度加工出现小的偏差时,通过微量调节输入光束的方向能予以补偿。实验将该棱镜用于偏振光合束器和光学环行器等无源器件中取得了良好效果。     

The indices of refraction of molecular-beam epitaxy-grown Be<Subscript>x</Subscript>Zn<Subscript>1−x</Subscript>Te ternary alloys

We have used a combination of prism-coupling, reflectivity, and ellipsometric techniques to investigate the indices of refraction, n, of a series of Be_xZn_1−xTe thin films grown on InP substrates. After determining the concentrations of each of the Be_xZn_1−xTe alloys using x-ray diffraction measurements, we measured their n at discrete wavelengths using a prism-coupler setup. In addition, we used reflectivity measurements to complement the prism-coupler data and arrive at the dispersion relations of n for the Be_xZn_1−xTe alloys below their fundamental energy gaps. We then employed a rotating analyzer-spectroscopic ellipsometer to measure the complex reflection ratio for each of the films at angles of incidence of 65°, 70°, and 75°. By using the n values obtained from both the prism-coupler and the reflection-spectroscopy techniques to guide the ellipsometric analysis, we were able to obtain accurate results for the dispersion of n for the Be_xZn_1−xTe alloys, not only below their fundamental energy gaps, but also above their energy gaps (up to 6.5 eV) using these three complementary techniques.     

Numerical solution of Kramers-Kronig transforms by a fourier method

Title of program: KRONIG Catalogue number: ACMN Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue). Computer: CDC CYBER 72-26; Installation: Computing Services Unit, University of New South Wales. Operating system: KRONOS. 2.1.1 LEVEL 393 Programming language used: FORTRAN High speed storage required: 31k₈No. of bits in a word: 60 Overlay structure: none No. of magnetic tapes required: none Other peripherals used: line printer (unit 3) for testing. No. of cards in combined program and test deck: 101 Card punching code: IBM029     

宽调谐窄线宽脉冲钛宝石激光器

介绍了一种采用色散型布儒斯特棱镜扩束器调谐的脉冲钛宝石激光系统，通过泵浦光反馈泵浦，使转换效率提高了～８％；采用色散型布儒斯特棱镜扩束器加光栅（或平面镜）调谐，实现了窄线宽可调谐输出，输出激光能量为２３ｍＪ，转换效率达１９％．调谐范围为６８０～９１３ｎｍ，输出激光线宽小于０．０１ｎｍ。     

高透射比紫外偏光棱镜

报导一种由方解石和氟化钙晶体制成的棱镜在紫外区有非常高的透射比。通过精挑方解石，透射范围可到达０．２１μｍ。     

集成光学用单模磁光波导薄膜

采用双层（ＢｉＡｌ）ＹＩＧ膜结构来制作单模磁光波导。通过改变外延生长工艺来调节两层薄膜的折射率，可在一定波导的厚度范围内实现单模传输。Ｘ射线衍射测量表明薄膜质量良好，且易磁化方向平行膜面，最后利用棱镜耦合，观察了波导中的暗ｍ线。     

偏光棱镜视场角的严格分析

本文以格兰·泰勒棱镜为例,给出了任意入射面上的视场角计算公式,分析了视场角与入射面方位的关系,为高精度棱镜的测量和棱镜特征参量的精确标定提供了依据。