多波长高温计是非灰体表面高温精密测量最有力的工具，随着工业智能化程度的不断提高，实时获得温度的分布信息在冶炼、石化、航天、半导体等民用和国防领域需求强烈。但是受反演理论和光路结构的影响，现有多波长高温计仅局限于单点测温且不适于在线测量。为此，针对分布式真温测量快速反演需求，提出将广义逆理论与多光谱辐射测温理论结合，直接求解欠定方程组，实现无需发射率假设模型的真温快速精确反演；针对热辐射各点因远轴辐射传输像差较大，从而影响从待测目标所指定的面积上取出充满指定立体角辐射能量的获取问题，提出可调正交柱状透镜组的棱镜分光光路结构，使得线上各点辐射光斑大小与探测器单元匹配较好，从而形成完整的辐射通道。在解决上述两个关键问题后，结合高速同步数据采集系统和温度一步标定新方法，构建完整多波长高温计线温在线测量系统。课题为进一步完善多波长辐射测温技术，满足非灰体表面温度分布在线测量的实际需求提供有力支撑。

Multi-wavelength pyrometer is the most powerful tool for precise measurement of high temperature on non-gray surface. With the continuous improvement of industrial intelligence, real-time temperature distribution information is in great demand in civil and national defense fields such as smelting, petrochemical, aerospace, semiconductor and so on. However, due to the influence of inversion theory and optical structure, existing multi-wavelength pyrometers are limited to single-point temperature measurement and are not suitable for on-line measurement. For this reason, in order to meet the need of fast inversion of true temperature distribution in line temperature measurement, the generalized inverse theory and multi-spectral radiation temperature measurement theory are combined to solve the undetermined equations directly, so as to realize fast and accurate inversion of true temperature without emissivity hypothesis model. For the large aberration of far-axis radiation transmission at each point on the line, it will affect the extraction of the designated solid angle from the designated area of the target to be measured. In order to obtain the radiation energy, a prism beam splitting structure with adjustable orthogonal cylindrical lenses is proposed, which makes the spot size on the line match well with the detector unit, thus forming a complete radiation channel. After solving the above two key problems, a complete online temperature measurement system for multi-wavelength pyrometer is constructed by combining the high-speed synchronous data acquisition system and the new method of one-step temperature calibration. The subject provides strong support for further improving the multi-wavelength radiation temperature measurement technology and meeting the actual needs of on-line measurement of non-gray surface temperature distribution.