高能激光测量中的光强探测器面响应校正方法

Surface response correction method of light intensity detector in high energy laser measurement

为了降低光强探测器面响应非均匀性对高能激光惯性约束聚变(ICF)装置近场参数测量的影响,提出了一种高能激光近场参数测量中的光强探测器面响应非均匀性校正方法。理论方面推导了基于高能激光近场空域评价因子的多点线性定标校正模型,并设计及搭建了高均匀性线性输出的光强探测器面响应非均匀性自动校正装置。为了验证所提方法的有效性,对某型号科学级CCD的面响应非均匀性进行校正,探测器面响应调制度由1.42降至1.08,对比度由0.014降至0.004,相比两点定标方法,采用文中所提方法校正后光强探测器的均匀性大幅提高。结果表明,该方法可为高能激光ICF装置参数测量中的光强探测器面响应均匀性校正提供一种有效的技术手段。

In order to reduce the influence of the non-uniformity of the surface response of the intensity detector on the near field parameter measurement for the high-energy laser inertial confinement fusion device(ICF),a correction method for the non-uniformity of the light-intensity detector surface response in the near-field parameter measurement of the high-energy laser was proposed.Theoretically,a multi-point calibration linear correction model based on the high-energy laser near-field spatial evaluation factor was deduced,and a nonuniformity automatic correction device on surface response for high-uniformity linear output light intensity detector was designed and built.In order to verify the effectiveness of the proposed method,the surface response non-uniformity of a certain type of scientific-grade CCD was corrected.The surface response modulation degree of the detector was reduced from 1.42 to 1.08,and the contrast was reduced from 0.014 to 0.004.Compared with the two-point calibration method,the uniformity of the light intensity detector after correction using the proposed method in this article was greatly improved.The results show that this method can provide an effective technical means for the correction of the uniformity of the surface response of the light intensity detector in the parameter measurement of the high-energy laser ICF device in my country.