Uncooled infrared multispectral imaging technology based on micro-lens array and zonal filter

Industrial hazardous gas leakage detection using infrared imaging technology has become an important area of research and application. However, existing single-band imaging methods face limitations in power consumption and cost. This paper proposes a novel design based on a micro-lens zonal filter array. This system can perform multi-spectral infrared imaging of gas clouds from various typical industrial gas leaks using an uncooled infrared detector. The key innovation is the use of a partitioned filter array to split the incident infrared radiation into different spectral bands and focus them onto distinct regions of the focal plane detector. By simultaneously imaging multiple infrared bands from 3 to 14 μm, the system can effectively detect and differentiate between various gas species in the gas cloud. Preliminary results demonstrate that this approach can improve the detection efficiency of hazardous gas leakage and enable the miniaturization and integration of the infrared imaging system.