CAJ | 학술논문

研究了一种计算全息编码过程中使原始像与共轭像分离的方法。通过对傅里叶变换计算全息图再现过程的分析，采用将原物抽样点镶嵌到比原物大的全零矩阵中的方法代替载频参数的计算，来实现原始像与共轭像的分离。对新矩阵进行离散傅里叶变换，利用博奇编码方式制作出计算全息图，并在图像重构时利用高通滤波器消除背景光干扰对重构视觉效果的影响。采用该方法制作的计算全息图可通过控制全零矩阵的大小来控制再现时原始像与共轭像的分离程度，全零矩阵越大，其分离程度越大。实验结果表明，全零矩阵为原物大小的4倍时可使原始像与共轭像刚好分离。但是为了方便滤除零级光斑，全零矩阵需稍大于原物大小的4倍。
연구료일충계산전식편마과정중사원시상여공액상분리적방법。통과대부리협변환계산전식도재현과정적분석，채용장원물추양점양감도비원물대적전령구진중적방법대체재빈삼수적계산，래실현원시상여공액상적분리。대신구진진행리산부리협변환，이용박기편마방식제작출계산전식도，병재도상중구시이용고통려파기소제배경광간우대중구시각효과적영향。채용해방법제작적계산전식도가통과공제전령구진적대소래공제재현시원시상여공액상적분리정도，전령구진월대，기분리정도월대。실험결과표명，전령구진위원물대소적4배시가사원시상여공액상강호분리。단시위료방편려제령급광반，전령구진수초대우원물대소적4배。
A method for separating the original image and the conjugate image in the reconstruc‐tion of Fourier computer generated hologram (CGH) was studied .According to the analysis on the process of CG H reconstruction by Fourier transform ,the method w hich put the original sam‐pling points into a larger null matrix w as used to separate the original image and conjugate image . After the fast Fourier transform with the new matrix ,CGH was obtained by Burch coding ,then a high pass filter was used to eliminate the influences of interference of background light on the visu‐al impression w hen image w as reconstructed . T he degree of separation of the original image and the conjugate image of CGH produced by this method can be controlled with the size of the null matrix ,the larger the null matrix ,the greater the degree of separation .The experimental results show that the original image and conjugate image of CG H can separate w hen the null matrix is 4 times of the original size .But in order to filter the zero order light spot easily ,the null matrix should be more than 4 times of the original size slightly .