分析了旋转靶标工作时平行光束在空间的交叠区域，提出了该区域为 可准确定义的纺锤形圆锥体区域。使用旋转靶标测试时，只需将被测设备的方位俯仰视轴交点放置 在此区域内即可。使用旋转靶标对摆放在纺锤形圆锥体区域内不同位置的某型光电设备进行 了多次测角和跟踪精度的验证试验，测试值标准差和平均差的最大值均远小于该型设备的 对应指标。测试结果表明，只要将被测设备方位俯仰视轴的交点放置在以旋转靶标光锥顶点为中 心的纺锤形圆锥体区域内，由摆放位置偏差引入的测试误差就极其有限。测试结果的离散程度很 低，重复性很好，能满足测试应用的需求。验证试验证明了纺锤形圆锥体区域定义的正确性， 表明该定义可作为测试时判断被测设备是否与旋转靶对准的理论依据。

The overlap region of the parallel light beams in a space is analyzed when a dynamic precision target is running. The region is considered to be a cusiform cone region which can be defined accurately. When a dynamic precision target is used to test an optoelectronic device, it only needs to let the azimuthal pitch visual axis intersection point of the device to be tested be in this region. The dynamic precision target is used to test the angle and tracking accuracy of a given optoelectronic device in different positions in the region for many times. The maximum standard deviation and mean deviation of the test data obtained are much less than the corresponding specifications of the given device. The test result shows that as long as the azimuthal pitch visual axis intersection point of the device to be tested is in the above region, the test error due to the position deviation of the device to be tested is extremely limited. The test result has low discrete degree and good repeatability. It can meet the requirements for practical application. The verification test validates the definition of the fusiform cone. It shows that this definition can be taken as the theoretical basis for judging whether the device to be tested is in alignment with the rotating target during test.