位相编码计算全息在防伪中的应用  

Application of phase coding using CGH in anticounterfeiting

作　　者：黄奇忠[1] 杜惊雷[1] 张怡霄[1] 粟敬钦[1] 姚军[1] 郭永康[1] 

机构地区：[1]四川大学物理系,四川成都610064

出　　处：《激光杂志》2000年第1期39-40,45,共3页Laser Journal

摘　　要：提出一种计算全息位相编码防伪方法。它用迂回位相法对波面进行位相编码，然后用编码的波面与参考波面干涉，从干涉图样中读出记录的物体信息。物体信息由计算机产生或用ＣＣＤ记录，可以是有一定灰阶的物体。这种编码方法与全息干涉术相结合，可制作防伪功能极高的全息图。A anti counterfeiting method using CGH phase coding is presented in this paper.The phase of a wavefront is coded by means of detour phase coding and then interfere with a refenence wave.The object recorded in the hologram can be read out from the interference patterns.The object can be easily generated by computer,both black white and gray level object can be used in our method.Combining it with the holographic interfere,a holo gram with high anti counterfeiting ability can be made.

关 键 词：计算全息 位相编码 防伪 图像编码 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]