Center for Artificial Intelligence, Korea Institute of Science and Technology, Seoul, 136-791, South Korea.
Department of Physics, Seoul Science High School, Seoul, 03066, South Korea.
Sci Rep. 2023 May 31;13(1):8786. doi: 10.1038/s41598-023-35819-9.
The 3D display device shows an image with depth information. Conventional 3D display devices based on binocular parallax can focus accurately only on the depth of a specific screen. Because the human eye has a narrow depth of field (DOF) under normal circumstances, 3D displays that provide a relatively wide range of virtual depth areas have limitations on the DOF where clear 3D images are seen. To resolve this problem, it is necessary to find the optical conditions to extend the DOF and analyze the phenomena related to it. For this, by using the Rayleigh criterion and the Strehl ratio, a criterion for this extension of the DOF is suggested. A practical optical structure that can effectively extend the DOF is devised using a flat panel display. This optical structure could be applied to AR, VR, and MR in the field of near-eye displays. From the results of this research, the fundamental optical conditions and standards are proposed for 3D displays that will provide 3D images with extended DOF in the future. Furthermore, it is also expected that these conditions and criteria can be applied to optical designs for the required performance in the development of 3D displays in various fields.
3D 显示设备呈现具有深度信息的图像。基于双目视差的传统 3D 显示设备只能在特定屏幕的深度上精确聚焦。由于人眼在正常情况下景深（DOF）较窄，因此提供相对宽的虚拟深度区域的 3D 显示器在可清晰看到 3D 图像的 DOF 上存在限制。为了解决这个问题，需要找到扩展 DOF 的光学条件并分析与之相关的现象。为此，通过使用瑞利判据和斯特列尔比，可以提出扩展 DOF 的判据。使用平板显示器设计了一种可有效扩展 DOF 的实用光学结构。这种光学结构可以应用于近眼显示领域的 AR、VR 和 MR。从这项研究的结果中，可以为未来提供具有扩展 DOF 的 3D 显示设备提出基本的光学条件和标准。此外，这些条件和标准也有望应用于各种领域的 3D 显示器开发中，以满足所需性能的光学设计。
