以提高弧光灯热流标定系统积分器出口的热流密度为目标，给出了新系统的设计方法。首先介绍了系统的原理和设计目标，其次对氙灯的选择和定位进行了分析，然后根据氙灯、椭球镜以及积分器三者间的制约关系，对椭球镜和积分器的相关参数进行了设计和优化。最后，得到了一个各项指标较优的标定系统。在不均匀度小于3%的前提下，新系统积分器出口的热流密度平均提高了33%。另外，椭球镜的截面直径和深度分别减小了约16%和18%，在同水平工艺条件下，这一结果可使椭球镜镜面的加工精度更高。

To improve heat flux density at the exit of the integrator of arc lamp heat flux calibration system, an approach is proposed. Firstly, the principles and design objectives of the system are briefly introduced. Secondly, the selection and location of xenon arc lamp are analyzed. Thirdly, according to the restriction relationship among the lamp, the ellipsoidal specular and the integrator, relevant parameters of the ellipsoidal specular and the integrator are designed and optimized. Finally, a new calibration system with all optimum indicators is obtained. In the new calibration system, the heat flux density at the exit of integrator increases by 33% when unevenness is less than 3%. The truncation diameter and the depth of the ellipsoidal specular decrease by 16% and 18% respectively. Under the same process conditions, the results can lead to a higher process accuracy of ellipsoidal specular.