Holographic optical elements fabrication for AR display based on common-path interference

Ming Sun; Wei Du; Frank Guan; Shuyang Geng; Pengfei Mi; Huadong Zheng; Yingjie Yu; Xinxing Xia

doi:10.1117/12.2687424

27 November 2023 Holographic optical elements fabrication for AR display based on common-path interference

Ming Sun, Wei Du, Frank Guan, Shuyang Geng, Pengfei Mi, Huadong Zheng, Yingjie Yu, Xinxing Xia

Author Affiliations +

Proceedings Volume 12768, Holography, Diffractive Optics, and Applications XIII; 127680O (2023) https://doi.org/10.1117/12.2687424
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

Holography always records the 3D object information via interference and then reconstructs the 3D object via diffraction. A holographic optical element (HOE) can be fabricated by analog holographic exposure or digital holographic printing. Since HOE can be recorded on a thin plate or film of holographic material, it is always utilized as a combiner for augmented reality near-eye displays to achieve a compact form factor. The traditional method of HOE fabrication is to divide a coherent light beam into both a signal beam and a reference beam, and then make both beams meet at the holographic material for interference. The optical path of the traditional fabrication system employs more optical devices with complex optical designs. Therefore, a HOE fabrication system based on common optical path interference is proposed in this paper. This paper presents the eyeglass-style HOE fabrication method based on common optical path interference. The HOE fabrication system with a common optical path is designed with fewer optical devices and less vibration effect. As the reference beam, the incident beam illuminates the hologram film. Part of the incident beam passes through the film and is reflected by the curved mirror to illuminate the hologram film from the other side, which works as the signal beam. The crucial device of the proposed system is the curved mirror. We analyzed the effects on HOE fabrication using an off-axis parabolic mirror and a spherical mirror. The experiment finally fabricated the HOEs and verified them for the AR near-eye display.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ming Sun, Wei Du, Frank Guan, Shuyang Geng, Pengfei Mi, Huadong Zheng, Yingjie Yu, and Xinxing Xia "Holographic optical elements fabrication for AR display based on common-path interference", Proc. SPIE 12768, Holography, Diffractive Optics, and Applications XIII, 127680O (27 November 2023); https://doi.org/10.1117/12.2687424

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KEYWORDS

Holographic optical elements

Fabrication

Autoregressive models

Holographic displays

Beam path

Parabolic mirrors

Digital holography

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