研究了红外光源在有害气体检测中的地位和作用。介绍了三类 不同红外光源的结构原理，比较了它们相互之间的优缺点，并对其应用情况进行了综述。然后详细分析 了气体检测技术对红外光源性能的要求以及在光源选型时的注意事项。最后，根据有害气 体检测的发展需求，阐明了红外光源的发展趋势。

The status and role of an infrared source in gas concentration detection are studied. The structural principles of three different kinds of infrared sources are presented. Their advantages and disadvantages are compared with each other and their applications are overviewed. Then, the performance requirements of infrared sources for gas detection are analyzed in detail. The notes for source selection are given. Finally, the development trend of infrared sources are elucidated according to the development demands for harmful gas detection.