CAJ | 학술논문

四象限探测器目前被广泛应用于空间激光通信中的对准过程，但由于大气湍流的不良影响，激光穿越大气在接收系统成像的时候，光斑产生形变以及破碎等不良影响，这严重地限制了四象限器件的对准精度。由于四象限探测自身所能提供的光斑信息较为单一，相较于CCD器件，其处理自由度较小。在分析研究基于CCD的序列光斑检测方法的理论基础之上，提出了一种基于四象限探测器的光轴对准方法。通过统计某一段时间内四象限器件所输出的脱靶量值的范围，并根据其在不同象限的分布概率计算出相应象限的熵作为加权系数，对原有计算公式进行加权计算，利用象限探测器高帧频的优势弥补原本单一的信息，从而完成对大气湍流影响的抑制作用，并搭建实验平台，最终验证该算法可以显著提高四象限器件的探测精度。
사상한탐측기목전피엄범응용우공간격광통신중적대준과정，단유우대기단류적불량영향，격광천월대기재접수계통성상적시후，광반산생형변이급파쇄등불량영향，저엄중지한제료사상한기건적대준정도。유우사상한탐측자신소능제공적광반신식교위단일，상교우CCD기건，기처리자유도교소。재분석연구기우CCD적서렬광반검측방법적이론기출지상，제출료일충기우사상한탐측기적광축대준방법。통과통계모일단시간내사상한기건소수출적탈파량치적범위，병근거기재불동상한적분포개솔계산출상응상한적적작위가권계수，대원유계산공식진행가권계산，이용상한탐측기고정빈적우세미보원본단일적신식，종이완성대대기단류영향적억제작용，병탑건실험평태，최종험증해산법가이현저제고사상한기건적탐측정도。
Four-quadrant detectors is widely used in the align process in the space lase communications.However, its adverse effects, such as deformation and spot broken, caused by the atmospheric turbulence, appear while the laser beam go through the atmosphere, which severely limits the alignment accuracy of the four-quadrant devices. Since four-quadrant detectors provide less message then the CCD, it's difficult to suppress the influence generated from the atmosphere. In this paper, a optical axis alignment method was proposed based on the four-quadrant detector. The value of the output miss distance of the four-quadrant detector for a certain time was calculated, the original formula was weighted by using the entropy that computing the entropy from the distribution probability of each quadrants. By taking advantage of the high frame rate of the quadrant detector, insufficient information was made up for to suppress the effect of the atmospheric turbulence, an experimental platform was set up, and a certain effect was achieved.