短波红外焦平面光谱成像技术已广泛应用于各个领域,在应用中发现背景辐射对系统成像质量及信噪比有明显的影响.本文针对影响系统信噪比的因素进行研究,基于可编程的短波红外焦平面探测器技术,提出设置背景参考行和差异化增益的方法,对背景辐射实时监测,并提高弱信号波段的信噪比.经过实验验证,相比于其他系统,采用此方法的短波红外焦平面超光谱成像系统在成像质量和信噪比方面明显提高.研究还表明,利用可编程的特性,选择任务需要的特征光谱波段,还可以进一步提高工作帧频,以满足更高分辨率的航天光谱成像.

Shortwave infrared hyperspectral imaging technology has been widely used in various fields. Background radiation has a significant effect on the image quality and Signal to Noise Ratio(SNR).Based on the programmable shortwave infrared detector, we proposed two methods of background reference line and differential gain. The methods can be real-time monitoring of background radiation and improving the SNR of the weak signal. Experimental verification shows that the image quality and SNR of SWIR hyperspectral imaging system are better than the other systems without these methods. By using of programmable feature, frame rate of the systemis improved. High frame rate detector is necessary to high resolution hyper spectral imager.