一种基于空间光程差调制的条纹位置测量方法

发布时间：2018-01-11 00:09

  本文关键词：一种基于空间光程差调制的条纹位置测量方法　出处：《光子学报》2016年09期 　论文类型：期刊论文

  更多相关文章： 光学技术与仪器 恒星干涉仪 干涉实验 条纹跟踪方法 干涉仪 大气湍流 光学相干 光学望远镜 干涉测量

【摘要】：提出了一种基于空间光程差调制的条纹位置测量方法,用于恒星干涉仪条纹搜寻和条纹追踪.来自基线两端的两光束合束时,通过合束器在两光束之间引入一个倾角,用以实现静态的空间光程差调制.使用成像透镜将静态光程差调制得到的白光干涉条纹成像到CCD探测器上.白光条纹位置的偏移与两光束之间的光程差大小相关,使用获得的干涉条纹实时计算白光条纹位置,测量出两束光之间的光程差,用于延迟线的实时光程差补偿,从而可以稳定干涉条纹.数值模拟和实验结果表明,采用该方法获得的最大光程差测量误差为0.159μm,小于数值模拟和实验所用宽带光的平均波长0.555μm,测量精度满足条纹相干的要求.与时间调制方法相比,该方法原理和算法简单,且对于大气扰动更不敏感.
[Abstract]:A fringe position measurement method based on spatial optical path difference modulation is proposed for star interferometer fringes search and fringe tracing. A dip angle is introduced between the two beams by a beam combiner. The white light interference fringes obtained by the static optical path difference modulation are imaged onto the CCD detector by using the imaging lens. The deviation of the white light stripe position and the optical path difference between the two beams. Relevant. Using the obtained interference fringes to calculate the position of white light stripes in real time, the optical path difference between two beams of light is measured, which can be used to compensate the real time optical path differences of delay lines, thus the interference fringes can be stabilized. The numerical simulation and experimental results show that the interference fringes can be stabilized. The maximum optical path difference error obtained by this method is 0.159 渭 m, which is less than the average wavelength of the broadband light used in numerical simulation and experiment. Compared with the time modulation method, this method is simple in principle and algorithm and less sensitive to atmospheric disturbance.
【作者单位】： 中国科学院国家天文台南京天文光学技术研究所;中国科学院天文光学技术重点实验室;中国科学院大学;
【基金】：国家自然科学基金(No.11273038)资助~~
【分类号】：P111
【正文快照】： 1-5002190InterferometryOCIS Codes:120.3180;350.1260;000.3110;120.4640;0引言使用延迟线和合束器将两个独立望远镜连接起来之后,可形成一个恒星干涉仪.恒星干涉仪的分辨能力决定于有效基线长度B.多个望远镜组成的恒星干涉仪结合地球自转产生的uv覆盖,可以进行高分辨的天文，

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