彩虹全息标识的计算全息加密

RAINBOW HOLOGRAM ENCRYPTION USING CGH

提出了一种利用计算全息实现对彩虹全息图的加密，利用全息干涉对信息解码的新防伪方法．将计算全息和普通的彩虹全息合成在一张全息图上．通常情况下只能看到普通的彩虹全息标识图，用另外一张计算全息图解码后，在其干涉图样中可再现出用于加密的图象信息．该方法可在不增加原有设备和条件的情况下，大大提高彩虹全息图的防伪力度．

A new encryption method for rainbow holograrn with CGH, which contains some encryption information, is presented in this paper. Usually only the image of rainbow hologram can be seen, but the encryption information appears if the other CGH is put on the rainbow hologram.This method largely increases the anti- counterfeiting ability of rainbow hologram without additional equipment or conditions, and finds application in some areas.