目标红外测距的实现同气体及其波段的选取密切相关。氧气A吸收带具有独特的谱线结构,对于火箭羽流或者高温辐射体的距离探测,氧气A吸收带是最佳的距离反演通道。通过深入研究逐线积分算法,设计了氧气A带标准光谱计算软件;利用吸收带带外数据,采用基线拟合的方法反演不同距离的带平均透射率,进而得到相应的距离。将ABB灯作为被测光源,在不同的距离下采集相应的光谱,并进行拟合计算,将实测数据的拟合计算结果同理论计算结果进行对比验证,其误差低于0.5%,在允许范围内。 The realization of target infrared ranging is closely related to the choice of gas and its band. Oxygen A absorption band has a unique spectral line structure, for the rocket plume or high-temperature radiator distance detection, oxygen A absorption band is the best distance inversion channel. By in-depth research of line-by-line integration algorithm, a standard spectral software for oxygen A band was designed. By using the data of absorption band, the average transmittance of different distances was retrieved by using the baseline fitting method, and the corresponding distance was obtained. The ABB lamp as the light source under different distances to collect the corresponding spectrum, and the fitting calculation, the measured data fitting calculation results with theoretical calculations to verify the comparison, the error is less than 0.5%, within the allowable range Inside.