一种由全息图制作相息图的方法

A New Approach for Making Kinoform from Hologram

将全息图通过高分辨率扫描仪扫入计算机,根据全息图的频域特性,对它进行一维傅立叶变换,频域滤波去载频,再逆傅立叶变换,求出全息面上的物光信息,从而实现三维场景相息图的制作。由于采用了一维快速傅立叶变换(1DFFT),大大提高了相息图的制作速度。

The hologram is scanned into computer through a high-resolution scanner. 1DFFT is performed, and the carrier frequency of hologram is filtered in Fourier domain. The phase of objects wave is obtained by converse Fourier transform. And then,the kinoform of 3D scenes are made. The speed of making kinoform is increased greatly due to that 1DFFT is employed.