Research and design of long optical range cell based on TDLAS methane detection system
In this paper,the structural principle of Herriott-type long optical range cell is adopted,and the optimal so-lution for the number of reflections of the Herriott cell under certain conditions is obtained through theoretical research and simulation analysis,and the design of a long optical range,low-cost and small-volume optical range cell is carried out by utilizing coated concave mirrors as mirrors,and by integrating the optical elements in the cell body.After exper-imental verification,the designed light-range cell with a physical length of 23 cm and volume of 243 mL of optical range cell can achieve 11 m effective optical range length,and built in the TDLAS methane detection system.The re-sults show that the lower limit of detection is the lowest concentration of 47.6 ppb,which provides an effective way promote the application of the low-concentration,high-precision,and miniaturized TDLAS methane detection system.
万方数据
维普
