基于离散Fourier变换的内源全息图重构计算方法

Study on the inside source hologram reconstruction algorithm based on discrete Fourier transform

对基于离散Fourier变换的内源全息图重构计算方法作了深入系统的分析 ,讨论了如何计算整个球面全息图对原子重构像的贡献 ,克服了以往该方法只能计算半个球面全息图的不足 ,并运用采样定理知识 ,分析了全息图的采样率、重构像的空间范围和分辨率等问题 .

The inside source hologram reconstruction algorithm based on discrete Fourier transform was investigated in detail, and how to calculate the contribution of whole spherical hologram to the reconstructed image of atoms was demonstrated in this algorithm, which was previously regarded to be capable of calculating only half of the spherical hologram. Using the sampling theorem in this issue, we are able to examine such essential factors as the sampling rate of the hologram, domain and resolution of reconstructed image.