CAJ | 학술논문

为了研究联合变换相关器中照明光束对输出相关点的影响,针对特定目标图像,采用数值模拟的方法,定量分析了联合变换相关器中照明光束为高斯光束时,输出相关峰值随高斯光束特性参量和输入图像在输入平面上位置的变化情况.得到了输出相关峰值随高斯光束腰斑半径减小和输入平面上目标图像位置偏离高斯光束中心距离的增加而减小的结果.模拟结果显示,如果腰斑半径1mm的高斯光束,扩束为腰斑半径32mm的高斯光束时,刚好满足输入图像在光斑边缘处输出相关峰值为输入图像在光斑中心处输出相关峰值的90%,则要求扩束前后高斯光束腰斑中心振幅比值为5.7.结果表明,为使输入图像在整个输入平面上任何位置都输出高的相关峰值,扩束后的高斯光束腰斑半径应满足一定要求.
위료연구연합변환상관기중조명광속대수출상관점적영향,침대특정목표도상,채용수치모의적방법,정량분석료연합변환상관기중조명광속위고사광속시,수출상관봉치수고사광속특성삼량화수입도상재수입평면상위치적변화정황.득도료수출상관봉치수고사광속요반반경감소화수입평면상목표도상위치편리고사광속중심거리적증가이감소적결과.모의결과현시,여과요반반경1mm적고사광속,확속위요반반경32mm적고사광속시,강호만족수입도상재광반변연처수출상관봉치위수입도상재광반중심처수출상관봉치적90%,칙요구확속전후고사광속요반중심진폭비치위5.7.결과표명,위사수입도상재정개수입평면상임하위치도수출고적상관봉치,확속후적고사광속요반반경응만족일정요구.
In order to study the effect of illuminating beam on output correlation spots,for a given target image,the relation among the output correlation peak value,the parameters of Gaussian beam and the location of the image on the input plane was simulated with the joint transform correlator illuminated by Gaussian beam.It was found that the output correlation peak value decreased with the decrease of the waist radius of Gaussian beam and the increase of the interval between target image on input plane and the center of Gaussian beam.Simulation results show that the ratio of amplitude of the center of Gaussian beam before and after beam expansion should be 5.7 if the waist radius of 1mm is expanded to 32mm,where the output correlation peak value at the edge of the facula is 90% of that at the center,and that in order to output high correlation peak value when images locate any place on the input plane,the waist radius of Gaussian beam must be expanded big enough.