Design of near-eye display with cylindrical holographic waveguide

Yu Mei; Fei Peng; Xinxing Xia; Furong Yang; Yingjie Yu; Banghua Yang; Mingwu Kang

doi:10.1117/12.2601137

9 October 2021 Design of near-eye display with cylindrical holographic waveguide

Yu Mei, Fei Peng, Xinxing Xia, Furong Yang, Yingjie Yu, Banghua Yang, Mingwu Kang

Proceedings Volume 11898, Holography, Diffractive Optics, and Applications XI; 118980M (2021) https://doi.org/10.1117/12.2601137
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

Currently most of the holographic waveguide near-eye display are based on flat waveguide structure. It is always required to add curved goggles for head mounted display (HMD) or helmet display. And consequently, the human eyes have to see through both the flat waveguide and the curved goggles when viewing see-through background. It suffers from bulky form-factor, low transmittance and limited application. Therefore, this paper proposes a near-eye display system based on curved holographic waveguide, which integrates both flat waveguide and curved goggles. This design includes cylindrical holographic waveguide and corresponding micro projection module. To ensure the rays transmitted regularly in the waveguide, we designed special holographic optical elements (HOEs) attached on the surface of cylindrical waveguide to achieve large exit pupil and field of view (FOV). Besides, the aspheric lenses in the micro projection module are employed to correct aberration caused by cylindrical waveguide. This novel design of the proposed HMD with cylindrical waveguide can achieve a binocular FOV of about 42° in diagonal, an eye relief of 15mm and exit pupil of 10mm×10mm. For the central FOV, the modulation transfer function is close to the diffraction limit, and the intensity is uniformly distributed at the exit pupil with high light efficiency. For the edge FOV, the image quality is still good and suitable for the human eye. This novel design integrates the waveguide with curved goggles into one curved waveguide based near-eye display, which can provide a new approach for portable near-eye display applied in the helmet or some other related usages.

Citation Download Citation

Yu Mei, Fei Peng, Xinxing Xia, Furong Yang, Yingjie Yu, Banghua Yang, and Mingwu Kang "Design of near-eye display with cylindrical holographic waveguide", Proc. SPIE 11898, Holography, Diffractive Optics, and Applications XI, 118980M (9 October 2021); https://doi.org/10.1117/12.2601137

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KEYWORDS

Waveguides

Holography

Diffraction

Optical design

Holographic optical elements

Head-mounted displays

Displays

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