研制了一套全自动测量系统，快速、高精度地检测了大口径积分球的方向辐射特性。该测量系统由扫描机构、陷阱探测器和总控系统组成，总控系统控制安装有陷阱探测器的扫描机构按设定的位置进行位移，并控制数据采集器进行数据采集，最后完成数据显示、分析及保存。该系统面均匀性扫描范围为1 m×1 m，角度特性扫描范围为±60°。利用该测量系统对自行研制的2.5 m直径积分球进行了测量，实现了全自动控制，证实了该测量系统测量速度快，测量精度高，得到该积分球的面均匀性为0.19％，在±45°范围内朗伯最大偏移为1.03%，水平方向角度特性为0.010 3，垂直方向角度特性为0.006 8。该系统已成功用于国内多个大口径积分球的测量，获得了满意的测试结果。

An automatic testing system is developed to test directional radiometric characteristics of large aperture integrating spheres quickly and precisely. The testing system is made up of a scan unit,a trap detector and a control unit. The control unit controls the scan unit fixed with the trap detector to displace according to the set position, then controls the data collector to collect,display and save the data.The system shows its scan ranges of plan uniformity and the directional characteristic are 1 m×1 m and ±60°,respectively. The system is used to test a large aperture integrating sphere with a diameter of 2.5 m,which is automatic and characterized by high precision and efficiency. Obtained results indicate that the plan uniformity is 0.19%, and the maximum offset of Lambert characteristic is 1.03% at ±45°.Currently,the system has been successfully applied to the test of large aperture integrating spheres for many times,and satisfied results are obtained.