Fig. 1. Principle of infrared imaging detection for dangerous gas leakage

Fig. 2. Molecular absorption lines of typical industrial gases (1 atm, 296 K)

Fig. 3. Spectral response of ULIS broadband uncooled IRFPA

Fig. 4. Spectral response of DRS broadband uncooled IRFPA

Fig. 5. SCD broadband and ordinary long wave pixel absorption

Fig. 6. Spectral absorption of INO broadband uncooled uncooled IRFPA

Fig. 7. Relative spectral response of IRay broadband uncooled IRFPA

Fig. 8. Spectral response of Guangwei broadband uncooled IRFPA

Fig. 9. Broadband gas imaging detection prototype of BIT

Fig. 10. Broadband gas imaging prototype of BIT

Fig. 11. Infrared imaging detection of outfield leakage gas of BIT

Fig. 12. Schematic diagram of multiaperture multispectral imaging system

Fig. 13. VOxgas640 for methane imaging

Fig. 14. FLIR GF77 gas imager and its methane imaging

Fig. 15. Refer to filter and active filter application

Fig. 16. Telops Hyper-Cam infrared thermal imager

Fig. 17. Schematic diagram of infrared spectral imaging system and its principle

Fig. 18. GCI gas cloud imaging detector

Fig. 19. Propane imaging by GCI

Fig. 20. Principles of imaging spectral mapping

Fig. 21. Infrared imaging detection of gas leakage by differential spectral filtering

Fig. 22. Infrared objective lens and its spectral transmittance

Fig. 23. Filter runner and its filter spectrum

Fig. 24. FPGA image processing board composition

Fig. 25. Infrared imaging system for gas leakage

Fig. 26. Infrared imaging of difluoroethane gas leakage by long-pass filter

Fig. 27. Samples collected. (a)~(c) Leaking gas; (d)~(f) Interference from people, trees, pumping units, etc.

Fig. 28. Fusion of visible light containing water vapor and infrared image of leaking gas traces

Fig. 29. Gasoline volatilization in a 50 m distance transfer tank