实现相息图快速计算的一种方法

Fast Computation of the Kinoform Using Look - up Table

建立一张物点位置和它在相息图上单位振幅波前分布关系的表格,采用查表的方法求物点在相息图样点上的波前分布,加快了计算输出相息图的速度。在保留重构图象细节的前提下,该方法的运算速度比平方根准确计算的方法提高5倍以上。

Computational speed is increased many times through the use of a precomputed look - up table containing a large array of sampling point on kinoform corresponding to point source contributions from each of possible locations in object space. The numerical result shows that the look-up table approach is quite effective .and the computational speed becomes 5 times faster than the conventional method.