改进最大熵算法重建日像仪太阳图像

通过对SB算法在搜索方向上的改进,使原算法由于近似而产生较大误差时可以自动得到校正,达到了快速与准确的和谐统一;利用两种算法对中国科学院国家天文台拟建的日像仪进行了仿真.结果显示,改进算法的重建图像分辨率得到明显提高而时间效率与原有算法相当,大量仿真则证明了算法收敛的稳定性。     

基于干涉理论的光纤马赫泽德尔干涉仪分析研究

全光纤的Mach-Zehnder干涉仪是一种重要的干涉器件,因其具有干涉现象、体积小、重量轻、结构紧凑、灵敏度高等特点,可用于光纤通讯和光纤传感领域。本文利用干涉分析方法,通过计算机数值模拟,研究了Mach-Zehnder干涉仪的传输特性．得出了输出端的谱线与两个耦合器的分光比变化的关系。     

迈克尔逊干涉实验及其效果

在学生实验中,设计了一些相关的可定性观察的内容,开拓了学生的思维,提高了兴趣,效果较好.     

光全息术的回顾、发展及相关产业的现状

本文简要叙述了光全息术的原理及其发展过程。同时就其在生产领域发展较为成熟的全息干涉计量，全息存贮，显示全息和模压全息等产业的现状及其未来的发展作了较详细的概述。     

A holographic three-slit interferometer

A new type of real-time holographic three-slit interferometer is presented.It uses a calcite polarized optical element to obtain objective light and reference light to record a hologram.Its remarkable feature is to use a beam of fixed slit diffracted light as the reference light to record the lateral slit diffracted wave front,and to use also the same diffracted light as the illuminating light to reconstruct the wave front.This insures the phase distribution of the reconstructed wave front against the influence by the small natural direction drift of the laser beam and also by the tiny external vibration.The stabillity,reliability and measuring accuracy of this apparatus are improved notably.     

Simulation of distributed optical fiber disturbance detection system based on Sagnac/Mach-Zehnder interferometer and cross-correlation location

A distributed optical fiber disturbance detection system consisted of a Sagnac interferometer and a Mach-Zehnder interferometer is demonstrated. Two interferometers outputs are connected to an electric band-pass filter via a detector respectively. The central frequencies of the two filters are selected adaptively according to the disturbance frequency. The disturbance frequency is obtained by either frequency spectrum of the two interferometers outputs. An alarm is given out only when the Sagnac interferometer output is changed. A disturbance position is determined by calculating a time difference with a cross-correlation method between the filter output connected to the Sagnac interferometer and derivative of the filter output connected to the Mach-Zehnder interferometer. The frequency spectrum, derivative and cross-correlation are obtained by a signal processing system. Theory analysis and simulation results are presented. They show that the system structure and location method are effective, accurate, and immune to environmental variations.     

迈克尔逊干涉仪定域干涉实验中的几个问题

详细分析了在扩展光源照明下迈克尔逊干涉仪实验中常出现的几个问题,并提出了相应的解决方案,对理解和指导实验具有实际意义。     

A novel three-component hybrid-integrated optical accelerometer based on a Mach-Zehnder interferometer with a LiNbO3 photoelastic waveguide

An investigation of the properties ofa LiNbO3 photoelastic waveguide via the acceleration-induced effect is presented.A novel three-component hybrid-integrated optical accelerometer based on a Mach-Zehnder interferometer with a LiNbO3 photoelastic waveguide has been designed, which is capable of detecting seismic acceleration in high-accuracy seismic exploration.The Mach-Zehnder interferometer was successfully fabricated and a lighting test used to check its quality. The frequency response characteristic of the accelerometer was measured. The accelerometer with a resonant frequency of 3549 Hz was demonstrated to show good linear frequency responding characteristics in the range of 100-3000 Hz. The accelerometer also shows good stability and consistency. Experimental results indicate that the outputs of the on- and cross-axis are 147 and 21.3 mV, respectively.     

莫尔条纹生成方法的实验研究

分别利用双光棚叠加和双干涉条纹叠加的方法得到莫尔条纹,并对实验结果进行了比较,对干涉条纹叠加方法具有更强的实用性。     

用光纤迈克尔逊干涉仪测量晶体的弹光系数

运用折射率椭球分析晶体的弹光效应。采用光栅位移传感器对测量群折射率的光纤迈克尔逊白光干涉技术进行了改进,提高了测量精度。通过测量石英晶体在不同的外力下折射率的变化情况,确定了晶体的弹光系数。