Study on error signal of quadrant detectors in laser seekers
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摘要: 为了分析四象限探测器偏差信号对激光导引头探测定位精度的影响，在激光导引头四象限探测器探测定位原理的基础上，采用计算机建模仿真的方法，研究了入射光斑大小、分划线宽度和背景光强度对四象限探测器偏差信号的影响。结果表明，入射光斑变大，四象限探测器的灵敏度会变低，动态跟踪范围变大；分划线宽度在探测器串扰允许的范围内越窄越好；背景光降低了四象限探测器的灵敏度。该研究结果有助于提高激光导引头四象限探测器探测定位精度。Abstract: In order to study effect of error signal of a quadrant detector on detection positioning accuracy of a laser seeker, based on the detection and position principles of a quadrant detector, the influence of size of light spot, width of division line and intensity of background light on error signal was studied by means of computer simulation. The results show that bigger size of the light spot will decrease the sensitivity of a quadrant detector and extend the dynamic range. Narrower width of division line is optimal under the condition of good crosstalk performance. The background light will decrease the performance of detector. The study is helpful to improve the detection positioning accuracy of quadrant detectors in laser seekers.
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