基于加密傅里叶变换全息印刷防伪技术研究

在研究双随机相位数据加密技术的基础上,结合印刷技术和全息技术的特点,提出了一种基于傅里叶变换印刷全息标识防伪方法。该方法将二值认证图像经过输入面和频谱面上双随机相位加密模板调制生成的物光,与参考光叠加生成加密的傅里叶变换全息图,该全息图可生成印刷全息防伪标识。通过打印和扫描实验验证了加密的傅里叶变换全息标识,可以通过数字印刷技术印制在证件等印刷品上作为防伪标识,具有重要的实用意义。

Study on identification mark of encrypted Fourier holography

It is a high quality data encryption technology that the data are encrypted by double-random phase encoding with uniformly distributed random phase in both the input and Fourier planes.Based on the two double-random phase encoding method,the holographic technology and the printing technology,a new encrypted Fourier holography mark is proposed.Theoretic and computer simulation prove that the encrypted Fourier holograph mark is availability,robustness and security.Experimental results on the printing and scanning processes are presented to demonstrate the proposed holography mark is significant.The holography mark can be printed as an identification mark.