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在短距离、高分辨角跟踪器的应用中,窄光束的激光源较微波源优越。在这种应用中,用图象位置传感器(IPS),能敏感目标光学辐射出现的角度。分析及试验表明,在有旋转反射镜图象位置传感器,当旋转镜中的图象位移大于图象尺寸时,会出现方位和俯仰通道之间的交叉耦合、非线性效应以及饱和效应。将计算机编码设计出的可变密度空间滤光片(VDSF),放在旋转镜的前面,就能大大提高旋转镜图象位置传感器的性能以至跟踪器的性能。
In the application of short distance and high resolution angle tracker, the laser source of narrow beam is superior to the microwave source. In this application, the image position sensor (IPS) is used to sense the angle at which the target optical radiation appears. Analysis and experiments show that when there is a rotating mirror image position sensor, the cross-coupling, nonlinear effect and saturation effect between the azimuth and the pitch channel appear when the image displacement in the rotating mirror is larger than the image size. The computer-coded variable density spatial filter (VDSF), placed in front of the rotating mirror, can greatly enhance the performance of the rotating mirror image position sensor and tracker performance.