全息图的数字重现

Digital Reconstruction of Hologram

计算机数字重现全息图可消除像差、噪声及记录过程中底片非线性等因素的影响，与可见光重现相比有更大的灵活性。对短波长全息如Ｘ射线全息、电子全息来说，数字重现可大大提高其重现分辨率。本文给出了全息图数字重现的理论公式，利用理想全息图的强度分布数据成功地重现了同轴和离轴全息图，并对重现结果作了分析。

There are many advantages while reconstructing hologram in optal way, suchas the easy elimination of aberrations, noises, and nonlinearity etc. As to Shortwavelength holography (X-ray holography, electron .hologtaphy), resolution can begreatly improved by means of digital reconstruction. The theoretical formulae for digitalreconstruction of hologram are given. Reconstructions of in-line and off-axis hologramrespectively are brought out successfully from ideal holograms in digital way. All theresults are also analyzed.