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主要解决空间激光通信精跟踪系统光斑实时检测与跟踪的问题。针对四像限探测器的特点,使用两级增益放大、数字信号处理(DSP)、振镜等系统,完成光斑实时检测与跟踪。对系统组成原理与设计原理进行了详细论证。搭建实验系统完成了相关实验。实验表明在入射光功率为1.3μW时,四像限探测器可实现位置分辨率1.6μm,角度分辨率0.8μrad,在整个光敏面内具有80细分的能力,跟踪精度在1倍方差时为2.1μrad。系统设计时以DSP作为数据处理与控制系统核心,具有体积小、参数修改方便和便于工程化等优点。
Mainly solve the space laser communications fine tracking system spot detection and tracking of real-time problems. For the characteristics of four-quadrant detector, two-stage gain amplification, digital signal processing (DSP), galvanometer and other systems are used to complete spot detection and tracking in real time. The principle of system composition and design principles are discussed in detail. Set up experimental system to complete the relevant experiments. Experiments show that the incident light power of 1.3μW, the four-quadrant detector can achieve the position resolution of 1.6μm, the angular resolution of 0.8μrad, the entire photosensitive surface with 80 subdivision ability to track the accuracy of 1 times variance 2.1μrad. System design to DSP as the core of data processing and control system, with small size, easy parameter modification and easy engineering.