1 中国科学院 深圳先进技术研究院, 广东 深圳 518055
2 奥比中光科技集团股份有限公司, 广东 深圳 518057
3 深圳大学 物理与光电工程学院, 广东 深圳 518061
为了提升显示系统的立体感, 将图像显示在空中, 无需介质承接即可实现较大的离屏距离, 建立了悬浮显示系统, 对该系统的显示理论和关键光学器件进行研究。首先, 从人眼双目立体视觉出发, 研究实现悬浮显示的两个关键因素: 一是图像经过显示系统形成实像; 二是双眼均能看到该实像, 并形成双目视差。然后, 在悬浮显示基础理论分析的基础上, 利用透镜搭建了一个悬浮显示系统, 验证上述原理分析。最后, 通过仿真分析设计了一个基于微反光镜阵列的悬浮显示系统, 并依据设计的加工流程完成系统的搭建。实验结果表明, 所搭建的悬浮显示系统可成功地将图像显示在空中, 无需介质承接, 离屏距离大于6.5 cm, 验证了本文对悬浮显示原理的分析及悬浮显示系统的设计。
悬浮显示 立体视觉 双目视差 floating display binocular stereo vision binocular parallax
Author Affiliations
Abstract
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
A distortion correction method for the elemental images of integral imaging (II) by utilizing the directional diffuser is demonstrated. In the traditional II, the distortion originating from lens aberration wraps elemental images and degrades the image quality severely. According to the theoretical analysis and experiments, it can be proved that the farther the three-dimensional image is displayed from the lens array, the more serious the distortion is. To analyze the process of eliminating lens distortion, one lens and its corresponding elemental image are separated from the traditional II. By introducing the directional diffuser, the aperture stop of the separated optical system changes from the eye’s pupil to the lens. In terms of contrast experiments, the distortion of the improved display system is corrected effectively. In the experiment, when the distance between the reconstructed image and lens array is equal to 120 mm, the largest lens distortion is decreased from 46.6% to 3.3%.
080.1005 Aberration expansions Chinese Optics Letters
2018, 16(4): 041001
