基于平场光栅的稀疏约束鬼成像高光谱相机

发布时间：2018-05-26 11:30

本文选题：成像系统 + 关联成像　；参考：《光学学报》2017年05期

【摘要】：基于稀疏约束的鬼成像光谱相机,能够通过单次曝光获得目标场景的三维空间光谱数据立方体。但是由于不同波长的散斑场在探测器的同一位置处,使得仪器的光谱分辨率和信噪比受到限制。为了解决上述问题,提出了利用平场光栅分光将不同波长的光场在探测面上错开一定距离的系统,实现了基于平场光栅的稀疏约束鬼成像高光谱相机。通过对系统成像过程的理论推导,得到了系统的关联函数,并通过实验和数值模拟验证了理论推导结果。在保证原先光谱相机优点的同时,基于稀疏约束的鬼成像高光谱相机可以分别调控光谱分辨率和空间分辨率,实现可控的信噪比。此外,还能够根据不同波长的光场特性来优化测量矩阵,从而提高图像恢复质量。
[Abstract]:The ghost imaging spectral camera based on sparse constraints can obtain the three-dimensional spatial spectral data cube of the target scene by single exposure. However, the spectral resolution and signal to noise ratio of the instrument are limited because the speckle fields of different wavelengths are in the same position. In order to solve the above problems, a flat field grating is proposed. The sparse constrained ghost imaging hyperspectral camera based on the flat field grating is realized by using the light field of different wavelengths on the detection surface. The correlation function of the system is obtained by theoretical derivation of the system imaging process. The theoretical derivation is verified by experiments and numerical simulations. At the same time, the ghost imaging hyperspectral camera based on sparse constraints can control spectral resolution and spatial resolution to achieve a controllable signal to noise ratio. In addition, the measurement matrix can be optimized according to the optical field characteristics of different wavelengths, thus improving the quality of image recovery.
【作者单位】：中国科学院上海光学精密机械研究所量子光学重点实验室;中国科学院大学;
【基金】：国家863计划(2013AA122902)
【分类号】：TB852.1

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