Variable-focus multispectral camera (VFMC) with spatial amplitude-splitting for integrated hazardous gas detection and identification

Hazardous gas leaks detection and quantitative analysis are crucial for industrial safety and environmental monitoring. Existing infrared gas imaging systems face challenges in combining wide-field detection with high-resolution identification, and are unable to simultaneously capture spatial and spectral information, which limits recognition accuracy and reliability. For this, a variable-focus multispectral camera (VFMC) based on spatial amplitude-splitting and continuous zoom is proposed in this paper. Operating in the 7-14µm wavelength range, the system provides continuous zoom from 22.5 mm to 75 mm, with its snapshot six-channel spectral imaging capability and an F/1 large-aperture design, the camera delivers high sensitivity, high spatial resolution, and simultaneous multispectral acquisition, significantly improving detection performance and identification reliability. This advancement holds considerable importance for rapidly detecting and analyzing gas leaks in complex environments.