光学与光电技术, 2020, 18 (2): 38, 网络出版: 2020-06-18  

天文图像中混叠光谱的高斯拟合分离方法

Gauss Fitting Method for Separating Mixed Spectra in Astronomical Images
作者单位
哈尔滨工程大学物理与光电工程学院, 黑龙江 哈尔滨 150001
摘要
随着光纤技术的发展, 其在天文观测仪器中得到了广泛的应用。在天文观测仪器中光纤数目通常达到几千根, 当光纤空间排布的间距过小时, 输出光谱容易产生混叠的现象。在不改变结构的前提下, 用软件的方法实现混叠光谱的分离, 假定输出光谱的强度分布是高斯函数形式, 应用高斯函数拟合法实现了混叠光谱的分离。与光纤间距较宽时的输出光谱进行对比, 得到了较好的分离效果, 最小均方差为 1.43。结果表明该方法应用在混叠光谱的分离中是可行的。
Abstract
With the development of optical fiber technology, it has been widely used in astronomical observation instruments. In astronomical observation instruments, the number of optical fibers usually reaches several thousand. When the spacing of optical fibers is too small, the output spectra is liable to overlap. Without changing the structure, the aliasing spectra is separated by software method, assuming that the intensity distribution of the output spectra is in the form of Gauss function, and the aliasing spectra is separated by Gauss function fitting method. Compared with the output spectrum when the distance between fibers is wider, a better separation effect is obtained. The minimum mean square deviation is 1.43. The results show that this method is feasible in the separation of aliasing spectra.

李玉祥, 陈龙震, 宗宣宇, 蒋博宇, 耿涛, 孙伟民. 天文图像中混叠光谱的高斯拟合分离方法[J]. 光学与光电技术, 2020, 18(2): 38. LI Yu-xiang, CHEN Long-zhen, ZONG Xuan-yu, JIANG Bo-yu, GENG Tao, SUNWei-min. Gauss Fitting Method for Separating Mixed Spectra in Astronomical Images[J]. OPTICS & OPTOELECTRONIC TECHNOLOGY, 2020, 18(2): 38.

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