Fabrication of an off-axis head-mounted display system with x-y polynomial surface

Jun Yu; Zhengxiang Shen; Pengfeng Sheng; Zhanshan Wang; Xiang Liu; Huabao Long; Junjie Wei; Jingfei Ye

doi:10.1117/12.2504762

16 January 2019 Fabrication of an off-axis head-mounted display system with x-y polynomial surface

Jun Yu, Zhengxiang Shen, Pengfeng Sheng, Zhanshan Wang, Xiang Liu, Huabao Long, Junjie Wei, Jingfei Ye

Proceedings Volume 10838, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 1083804 (2019) https://doi.org/10.1117/12.2504762
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Head-mounted display (HMD) system is a research hotspot in virtual reality, which has continuous and rapid development in training, medical treatment, aerospace, and entertainment. For the more comfortable immersive experience, the requirements of compact structure, large exit pupil and low F number should be met simultaneously in HMD system. With the use of x-y polynomial surface, an off-axis head-mounted display system with two freeform reflectors is achieved. The HMD system demonstrates a 10 mm exit pupil, a 23°×16° field of view, an f/# number of 3.0 and an eye relief larger than 15 mm. Based on the tolerance analysis of surface figure errors and position location, we present the on-machine measurement and compensation for enhancing machining accuracy, and the frame and mirror integration for high assembling accuracy. Finally, the HMD system was fabricated and the imaging quality was evaluated. In comparison with the results, the effectiveness of the on-machine measurement and compensation are validated, as well as the reliability of tolerance analysis and mechanical structure.

Citation Download Citation

Jun Yu, Zhengxiang Shen, Pengfeng Sheng, Zhanshan Wang, Xiang Liu, Huabao Long, Junjie Wei, and Jingfei Ye "Fabrication of an off-axis head-mounted display system with x-y polynomial surface", Proc. SPIE 10838, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 1083804 (16 January 2019); https://doi.org/10.1117/12.2504762

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KEYWORDS

Head-mounted displays

Mirrors

Tolerancing

Distortion

Optical design

Imaging systems

Modulation transfer functions

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