We propose a new method to secure 3D color object using the holographic imaging spectroscopy technique. First, the original 3D color object is illuminated with a super-continuum white laser source with no necessity to decompose 3D color object into RGB components in advance which is commonly a preprocessing operation in traditional monochromatic illuminated optical cryptosystem. The output spectrum of white laser can be used as an additional key. Then, we design an optical cryptosystem based on hyperspectral holography in order to encrypt both the spectral and spatial information simultaneously with a high spectral-spatial resolution. Finally, the decrypted images at multiple-wavelength are numerically averaged to significantly reduce the speckle noise which is hard to be eliminated in optical cryptosystems with monochromatic illumination. The feasibility of our proposal is validated with experimental hyperspectral images and numerical simulation.

我们提出了一种使用全息成像光谱技术保护3D彩色物体的新方法。首先，原始的3D颜色对象用超连续白色激光光源照明，而无需事先将3D颜色对象分解为RGB分量，这通常是传统单色照明光学密码系统中的预处理操作。白光激光器的输出光谱可以用作附加键。然后，我们设计了一种基于高光谱全息的光学密码系统，以便同时以高光谱空间分辨率对光谱信息和空间信息进行加密。最后，对解密后的多个波长的图像进行数值平均，以显着降低散斑噪声，而散斑噪声在具有单色照明的光学密码系统中很难消除。