Uncooled Snapshot Infrared Spectrometer With Improved Sensitivity for Gas Imaging

The high spreading speed and weak signal of a gas renders difficulty in accurately and rapidly determining its type and concentration distribution. In this study, we design an uncooled snapshot infrared spectral imaging system to detect weak gas leakage in real time. The system sensitivity is optimized in terms of optical and mechanical design as well as image enhancement. Subsequently, a system with a spatial resolution of 384
$\times $
307 pixels per channel, a frame rate of 8 Hz, and nine spectral channels in the 7–
$14~\mu $
m band is designed. Finally, the system’s capability for gas imaging is demonstrated, and the average deviation in concentration estimation is found to be 9.65% in our experiment.