基于液体透镜的快速高质量计算全息三维显示技术

3D display of computer generated hologram can record and reconstruct the wavefront of 3D objects, which can fully satisfy all depth information of human visual system. Therefore, it has wide application prospect in the fields such as military, medical and astronomical measurement. However, due to the huge amount computation of 3D object hologram and the limitation of the optoelectronic display devices, the calculation speed of 3D display of computer generated hologram is slow and it is difficult to achieve high quality holographic reconstruction. This project focus on the key scientific problems of computer generated hologram. We plan to study the relationship between the device parameters and the effective viewing area of the holographic display, and an effective collaborative processing platform of GPU and CPU will be established to study the method of increasing the hologram computing speed. By studying the liquid lens with high optical power, we will explore the relationship between the structural parameters of the liquid lens and the viewing angle of the holographic 3D display, and the holographic 3D display technology with large viewing angle will be researched. The principle of color holographic reconstruction will be studied. By combining the zoom characteristics of liquid lens, the method to improve the quality of the holographic reconstruction will be explored. In this research, a 3D display technology of color computer generated hologram with the properties of fast speed and high quality will be implemented, aiming at providing the theoretical reference and experiences for the development of 3D display of computer generated hologram and promoting the development of 3D display technology.

计算全息三维显示能够完整记录和重建三维物体的波前，提供人眼视觉系统所需全部深度信息，因此在军事、医疗和天文测量等领域内有着广泛的应用前景。然而由于三维物体全息图的计算量巨大，加之光电显示器件的限制，目前计算全息三维显示的计算速度慢，且难以获得高质量的全息显示效果。本项目拟对计算全息显示中存在的关键问题进行研究：通过研究器件参数与全息显示有效视区之间的关系，建立GPU和CPU有效协同处理平台，研究提高全息图计算速度的机理和方法；通过研究高光焦度的液体透镜，探究液体透镜结构参数与全息三维显示视角的制约关系，研究大视角的全息三维显示技术；研究彩色全息再现的原理，结合液体透镜的可变焦特性，研究提高全息三维显示图像质量的方法。最终实现具有快速高质量的彩色计算全息三维显示技术，旨在为计算全息三维显示的发展提供理论参考和经验积累，推进三维显示技术的发展。

本项目对计算全息显示中存在的关键问题进行了研究：研究了器件参数与全息显示有效视区之间的关系，研究了提高全息图计算速度的机理和方法；通过设计高光焦度的液体透镜，探究了液体透镜结构参数与全息三维显示性能的制约关系，研究了彩色全息再现的原理，结合液体透镜的可变焦特性，提出了提高全息三维显示图像质量的方法并搭建了相应的系统。发表SCI论文18篇，已授权中国发明专利12件，且申请美国发明专利1件，PCT国际发明专利1件。协助培养4名研究生。