全息打印技术研究进展

全息打印技术可以实现场景的真三维显示，根据干涉纹样的不同来源及不同记录方式，可将其归类为合成全息体视图打印、计算全息图打印与全息波前打印。合成全息体视图打印无法准确记录三维场景的深度信息，因而全息图再现时存在会聚-调节矛盾；计算全息图打印能够准确记录与再现场景的深度信息，继而解决会聚-调节矛盾，然而仅能得到薄的透射型全息图，因而无法实现白光再现；全息波前打印既可以解决会聚-调节矛盾，又可以得到厚的反射型全息图，实现具有良好观察效果的白光再现。首先介绍了各类全息打印技术的基本原理，着重分析了各自的研究现状，然后讨论了它们的优缺点，以说明各类全息打印技术的特性。

Progress in holographic printing technique

Holographic printing technique can achieve a true three-dimensional display of the scene well. Based on different sources and different recording methods of interference patterns, holographic printing techniques can be classified as synthetic holographic stereogram printing, computer-generated hologram printing, and wavefront printing. Synthetic holographic stereogram printing can't record the depth information of the three-dimensional scene accurately, so there occurs the vergence-accommodation conflicts during the reconstruction of the hologram. Computer-generated hologram printing can record and reconstruct the depth information of the scene accurately, and solve the vergence-accommodation conflicts. However, the hologram is only a thin transmission hologram which can't be reconstructed by white light. Wavefront printing can not only solve the vergence-accommodation conflicts, but also achieve a thick reflection hologram for white-light reconstruction with good observation effect. Principles of different holographic printing techniques were introduced, then research status of each technique was analyzed. Finally, the advantages and disadvantages of them were discussed to illustrate their own properties.