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首页> 外文期刊>Applied optics >Compact camera for multispectral and conventional imaging based on patterned filters
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Compact camera for multispectral and conventional imaging based on patterned filters

机译：紧凑型相机，用于基于模式滤镜的多光谱和常规成像

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摘要

A multispectral camera concept is presented. The concept is based on using a patterned filter in the focal plane, combined with scanning of the field of view. The filter layout has stripes of different bandpass filters extending orthogonally to the scan direction. The pattern of filter stripes is such that all bands are sampled multiple times, while minimizing the total duration of the sampling of a given scene point. As a consequence, the filter needs only a small part of the area of an image sensor. The remaining area can be used for conventional 2D imaging. A demonstrator camera has been built with six bands in the visible and near infrared, as well as a panchromatic 2D imaging capability. Image recording and reconstruction is demonstrated, but the quality of image reconstruction is expected to be a main challenge for systems based on this concept. An important advantage is that the camera can potentially be made very compact, and also low cost. It is shown that under assumptions that are not unreasonable, the proposed camera concept can be much smaller than a conventional imaging spectrometer. In principle, it can be smaller in volume by a factor on the order of several hundred while collecting the same amount of light per multispectral band. This makes the proposed camera concept very interesting for small airborne platforms and other applications requiring compact spectral imagers.
机译：提出了多光谱相机概念。该概念基于在焦平面中使用带图案的滤镜，并结合了对视场的扫描。滤波器布局具有正交于扫描方向延伸的不同带通滤波器的条纹。滤波器条带的模式使得所有波段都被采样了多次，同时最小化了给定场景点的采样总持续时间。结果，滤光器仅需要图像传感器面积的一小部分。剩余区域可用于常规2D成像。示范摄像机已在可见光和近红外波段形成了六个波段，并具有全色2D成像功能。演示了图像记录和重建，但是对于基于此概念的系统，图像重建的质量有望成为主要挑战。一个重要的优点是可以将相机制造得非常紧凑，而且成本也很低。结果表明，在不合理的假设下，建议的摄像机概念可以比常规成像光谱仪小得多。原则上，在每个多光谱带收集相同数量的光的同时，其体积可以缩小数百倍。这使得所提出的摄像机概念对于小型机载平台和其他需要紧凑型光谱成像仪的应用非常有趣。

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