Maxwellian-view display based on pinhole glasses of timing-polarizing characteristics. (May 2023)

• Record Type: Journal Article
• Authors: Ye, Qiu; Liu, Lilin; Fan, Haizhen; Pang, Zhiyong; Huang, Haikun; Teng, Dongdong
• Is Part Of: Optics and lasers in engineering. Volume 164(2023)
• Publication Date: 2023-05
• Subjects: Maxwellian-view -- 3D display -- pinhole -- Crosstalk suppression; Lasers in engineering -- Periodicals; Optical measurements -- Periodicals; Optics -- Periodicals; Lasers en ingénierie -- Périodiques; Mesures optiques -- Périodiques; Optique -- Périodiques; 621.36605
• DOI: 10.1016/j.optlaseng.2023.107501
• Languages: English
• ISSNs: 0143-8166

Abstract

Highlights: Among all existing VAC-free technologies, the proposed Maxwellian-view display requires the minimum data quantity, and can provide a relatively large depth of field due to the inherent small-divergence-angle of the presented light beams. For a VAC-free Maxwellian-view display based on pinholes, a pinhole-array is necessary for each eye of the viewer to get a large field of view (FOV). However, the crosstalk between adjacent pinholes keeps being a bottleneck problem. Through endowing timing and polarizing characteristics to two pinhole-arrays for the viewer's two pupils, such crosstalk gets suppressed effectively in the proposed Maxwellian-view display system. Compared to the extra optical structure needed by the point-source of light for projecting its image to the viewer, pinholes are expected to implement a head-mounted near-eye 3D display by a lighter and simpler optical system. Abstract: Pinhole is often used in Vergence-Accommodation Conflict-free (VAC-free) Maxwellian-view display, benefiting from its constraint on the diverging angle of passing-through light beams. For a larger field of view (FOV) from a display screen, a pinhole-array is needed by each eye of the viewer, with their pinholes guiding light from different small-FOV sub-screen respectively. However, the crosstalk between adjacent pinholes keeps being a bottleneck problem in such pinhole-based Maxwellian-view display. In this paper, specially-designed timing and polarizing characteristics are endowed to the pinhole-arrays of the viewer's two pupils, to implement a low-crosstalk Maxwellian-view display. Experimentally, a proof-of-concept display system based on a 240 Hz display screen gets implemented through two 3 × 3 pinhole-arrays. A diagonal FOV of 55 degrees and 60 Hz display frequency are successfully realized. The resulted intensity ratio between the crosstalk noise light to the signal light is suppressed to 4.7%. Furthermore, the existence of failure zones is discussed.