首次用二维多面体扫描镜测量了超音速氧碘化学激光器的二维增益分布，测得增益区沿气流方向较长，沿光腔高度方向靠近壁面的两侧存在明显的边界层效应，并且边界层的厚度随着远离喷管出口平面距离的增大而增加。 The two-dimensional gain distribution of supersonic oxygen-iodine chemical laser was measured by two-dimensional polygon scanners for the first time. It was found that the gain region was longer along the gas flow and there were obvious boundary layer effects on both sides of the wall along the height of the cavity. The thickness of the layer increases with increasing distance away from the exit plane of the nozzle.