A staring laser active imaging system based on APD arrays and splitting beam illumination was designed
in order to study the imaging performance of the imaging system on non-cooperative target in target tracking. The relationship between laser echo power and target distance was analyzed theoretically
and the result shows that the echo power of targets beyond 200 m is less than 1 μW. In order to improve operating distance of the system
a trans-impedance amplifier OPA657N with high gain-bandwidth was adopted to improve the system gain. In addition
the crosstalk of channels at high trans-impedance was overcame by optimizing the element arrangement. A block detection of 8-adjacent connection algorithm was employed to realize target detection and two-axis target tracking based on the verification of distance equation. The results show that the proposed imaging system can achieve stable imaging on non-cooperative target in 200 m
and can obtain echo signal of non-cooperative target in 420 m. When travel of the target in the direction of pitch axis and yaw axis is more than 2.5°
the system can realize real-time detection and stable tracking of the target.
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