期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2008
卷号：XXXVII Part B7
页码：321-324
出版社：Copernicus Publications
摘要：In order to provide a wider field of view and higher spatial resolution to meet requirement for a typical earth observation mission, the project to developing wide field of view hyperspectral imager is applied. The widener of field of view of the hyperspectal imager composed of one objective aperture and one dispersing element, not only is limited by the difficulty that the large area detector arrays is got, but also is limited by the difficulty of optical coupling efficiency's aspect of the optical system. This paper addresses the difficulty of developing wide field of view imaging sensor and presents the project to developing wide field of view hyperspectral imager. The project adopts one wide field of view objective lens and one long slit, but more dispersing element and detector arrays. The lens images a ground belt onto the long entrance slit, the slit acts as a field stop and allow only light from a linear belt in the scene to enter the imager. The light passing through the long slit is divided more equal parts using a special skill and it is separated and imaged on the area detector arrays by the more spectrometer. An optical head of wide field of view hyperspectral imager is composed of a large field of view lens, a long entrance slit, two spectrometers and two area detector arrays and has a cross-track field of view of 60 degrees. The lens is used to a camera lens and images a ground belt onto the long entrance slit. The above half of long silt is the entering silt of one dispersing element and the below half of the long silt is the entering silt of the other dispersing element. The light passing through the entering silt is collimated by the collimator and is separated into some parallel monochromatic lights with different angle by the dispersing element. Finally, these monochromatic lights are focused on the detector area array. By image preprocessing, the hyperspectral image of the wide field of view can be got. The main specialty of the development is: 1) the model is only composed a objective, it will reduce the difficulty and the workload of image preprocessing; 2) the model's plasticity is very strong, if the hyperspectral imager composed of two dispersing elements will have been developed, it can be extended to imager composed of more than two dispensing elements
