修正离轴全息编码的研究

The Research on Coding of Modified Off-axis Hologram

计算全息的编码过程就是将光波的复振幅分布变换为全息图的二维透过率函数的分布.从而编码问题可归结为将二维离散的复值函数变换为二维离散的实值非负函数的问题.通过研究经典的三种编码方法,提出新的编码方法来提高全息图的信噪比.结果证明本文的方法确实提高了信噪比.

Coding of the computer-generated hologram is to transform the distributing of plural amplitude into the distributing of two dimensional permeation rate functions.Actually,the process is to transform two dimensional discrete plural functions into two dimensional discrete positive functions.Three modified off-axis coding methods are simulated in the article,and two new coding methods are discussed.Compared with the early coding methods,the new mwthods can improve the SNR of the holograms.