Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, 100084, China.
Sci Rep. 2018 Oct 26;8(1):15863. doi: 10.1038/s41598-018-33730-2.
Three-dimensional (3-D) autostereoscopic display with dedicated multiple spatial information under corresponding illumination is critical, especially for anti-counterfeiting, entertainment, etc. In this paper, we propose a 3-D spatial floating display using multi-wavelength integral photography (IP). Using dedicated inkjet printer and refraction-based IP algorithm, a complex two-dimensional (2-D) elemental image array (EIA) can be printed for both fluorescent and normal 3-D autostereoscopic display. With a micro-convex lens array (MLA) and a medium attached on the EIA, normal 3-D images are reconstructed under visible light, while fluorescent 3-D images can be reconstructed under ultraviolet (UV) light. Moreover, to provide comfortable 3-D images with multiple information in space, a feasible 3-D spatial floating display system is also proposed considering the spatial position of the observer with less UV radiation. The proposed method takes the wavelength of 3-D display into consideration to provide spatial multi-information, and can be applied for media, entertainment, etc. Experimental results verified the availability of the proposed method.
三维（3-D）自动立体显示与对应的照明下的专用多个空间信息是至关重要的，特别是在防伪、娱乐等领域。在本文中，我们提出了一种使用多波长积分照相（IP）的三维空间浮显。使用专用的喷墨打印机和基于折射的 IP 算法，可以打印出复杂的二维（2-D）元素图像阵列（EIA），用于荧光和普通的 3-D 自动立体显示。在 EIA 上附有微凸透镜阵列（MLA）和介质，在可见光下可以重建普通的 3-D 图像，而在紫外光（UV）下可以重建荧光 3-D 图像。此外，为了提供具有空间多信息的舒适 3-D 图像，我们还提出了一种可行的 3-D 空间浮显系统，考虑到观察者的空间位置，减少了 UV 辐射。所提出的方法考虑了 3-D 显示的波长，提供了空间多信息，可应用于媒体、娱乐等领域。实验结果验证了所提出方法的有效性。
