Resolution-preserving passive 2D/3D convertible display based on holographic optical elements

• Main Authors: Deng, L. (Author), Gu, C. (Author), Xu, L. (Author), Yang, Y. (Author), Zhu, L. (Author)
• Format: Article
• Language: English
• Published: Optica Publishing Group (formerly OSA) 2022
• Subjects: Active components; Exit pupil; Experimental verification; Holographic optical elements; Holography; Human eye; Image source; Input image; Projection types; Proof of concept; Two wavelength
• Online Access: View Fulltext in Publisher

 We propose and demonstrate a resolution-preserving passive 2D/3D convertible display by two individual wavelengths. It uses a holographic optical element to generate two images and passively separate the exit pupils for these two wavelengths, which forms two viewpoints for each of the observer's eyes. Due to Bragg-mismatched reconstruction of two similar but distinct wavelengths, the images are separated in space. They can be fused into one through the convergence function of human eyes. By switching the input image source, the conversion between 2D and 3D mode can be realized. This method is resolution-preserving and 2D/3D convertible with no extra active components. For experimental verification, a proof-of-concept projection-type prototype is assessed. © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement