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作为现代遥感技术最重要的发展之一,光谱成像仪在军事、地质、海洋、大气探测等各个领域都有着广泛的应用。然而传统的色散或者干涉光谱成像仪由于需要多次曝光来扫描数据立方体,并不适合于场景快速变换的情况。四维(4D)光纤视场合成光谱成像仪,一种将特制光纤束置于望远镜的像面并成线性排列输出到光谱仪的技术,使得光谱成像仪能够通过单次曝光便获取目标的数据立方体,从而具有观测高速目标和瞬变现象的能力。搭建了一套桌面实验系统,在可见光谱段获得4.2nm的光谱分辨率,对彩色目标的成像效果良好。对光纤束排列误差进行了分析,并给出了校准方法。
As one of the most important development of modern remote sensing technology, spectral imager has a wide range of applications in various fields such as military, geology, oceanography and atmospheric exploration. However, traditional dispersive or interferometric spectroscopic imagers are not suitable for situations where the scene is rapidly changing because multiple exposures are required to scan the data cube. Four-dimensional (4D) optical field of view synthetic spectral imager, a special optical fiber bundle placed in the telescope image plane and linearly arranged to output to the spectrometer technology, making the spectral imager can obtain a single exposure of the target data cube, Which has the ability to observe high-speed targets and transient phenomena. A set of desktop experimental system was set up to obtain the spectral resolution of 4.2nm in the visible spectrum and good imaging effect on the color target. The fiber array alignment error was analyzed and the calibration method was given.