RAINBOW HOLOGRAM ENCRYPTION USING CGH
Yixia Zhang, Luo Ke-jian · Journal of Sichuan University · 2000
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.