为了实现对导弹导引头红外跟踪系统中抛物面反射主镜的装配角度进行监控和调试,提出了一种通过电荷耦合器件接收抛物面反射镜的聚焦光斑,同时旋转抛物面镜,采集光斑重心位置信息,并利用最小二乘法对光斑重心轨迹进行拟合,从而计算出光轴与结构中心轴之间的偏心角的实现方案。对实现方案进行了理论分析和实验验证,不同于通常的透射聚焦镜关系,得到该环状抛物面反射主镜的装配偏心角α与焦斑重心轨迹圆半径R间的线性关系式中的系数为1.13。结果表明,该系统能够应用于对抛物面反射主镜装配角度的测试和监控。

In order to monitor and test the setting up angle of the parabolic mirror of the infrared tracking system of the missile seeker in the assembly process,a new approach was brought up,in which a CCD(charge coupled device) was used to receive the focusing spot of the parabolic mirror and collect the center of gravity of the focusing spot while rotating the parabolic mirror.The track of the center of gravity of the spot was fitted with the least square method,so the eccentric angle between the optical axis of the parabolic mirror and the structural central axis could be found.The method was analyzed in theory and proved in experiments.Different from the traditional transparent focusing system,the eccentric angle of the ring parabolic mirror was proportional to the radius R of the track circle of the center of gravity of the focusing spot with a coefficient of 1.13.The experimental results indicate that the system meets the need to monitor and test the setting up angle of the parabolic mirror.