位相板紧贴全息图的加密记录

本文提出紧贴加密的新方法，将加密位相板紧贴全息干版，使全息记录的物光和参考光同时获得位相调制，不但提高了全息图的防伪能力，而且由于位相板紧贴全息图，解密时对位相板只需进行二维甚至一维的调节，即可获得原物光的共轭再现，避免了对位相板繁琐的多维复原调节，增强了实用性。

Cryptographic recording of hologram nestling closely to phase plate

A new cryptographic method of hologram is presented.The phase plate is nestled closely to holographic plate so as to the object light and the reference light are simultaneously modulated in phase.The anticounterfeiting ability of hologram is enhanced.At the same time owing to the phase plate is nestled closely to the hologram,when the hologram is decoded,the phase plate only has need to 2D or 1D adjust,the conjugation reconstruction of original object light is gotten.The overelaborate multiple restored adjusting of phase plate is avoided,so its practicality is raised.In this paper,the cryptographic design schemes of reference light for the transmission hologram and the reflection hologram are given.Owing to the reference light is properly designed,the corresponding recording process is not too complex.