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用平面激光诱导荧光（ＰＬＩＦ）技术测量了平面火焰炉、狭缝火焰炉的单脉冲激光诱导ＯＨ荧光。由平面荧光图可得到氢氧基相对浓度分布和它的宽度。对扩散火焰，高温区在ＯＨ带内侧；ＯＨ带的外侧则是火焰的边界，相干反斯托克斯拉曼光谱（ＣＡＲＳ）的测量结果对此提出了有力的佐证。湍流火焰的ＰＬＩＦ图则清晰地显示出火焰面的不规则性。氢氧基的ＰＬＩＦ图像是研究火焰结构和流场的有力工具。
The single-pulsed laser-induced OH fluorescence was measured by planar laser-induced fluorescence (PLIF) technique in a flat flame furnace and a slit flame furnace. The relative concentration distribution of hydroxyl group and its width can be obtained from the plane fluorescence chart. For the diffusion flame, the high temperature zone is inside the OH zone; the outer side of the OH zone is the boundary of the flame, and the coherent anti-Stokes Raman spectroscopy (CARS) measurements provide strong evidence. The PLIF plot of turbulent flames clearly shows the flames’ surface irregularities. The hydrogen-based PLIF image is a powerful tool for studying flame structures and flow fields.