Design of a head-mounted display with freeform mirrors

Congshan Rui; Chunmei Zeng; Tiantian Hu; Suodong Ma

doi:10.1117/12.2531787

30 August 2019 Design of a head-mounted display with freeform mirrors

Congshan Rui, Chunmei Zeng, Tiantian Hu, Suodong Ma

Proceedings Volume 11104, Current Developments in Lens Design and Optical Engineering XX; 1110402 (2019) https://doi.org/10.1117/12.2531787
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

A head-mounted display (HMD) requires a large field of view (FOV) and a large exit pupil diameter while maintaining a compact structure. In this paper, we show a head-mounted display design comprising two freeform mirrors covering a 28° full field-of-view with an eye relief of 15mm. The simplified partial differential equation (PDE) method is applied in the design of a two-mirror HMD system. Then the data points on the unknown freeform mirrors are calculated using the rays from multiple fields and are used to construct the freeform mirrors in the HMD system, which is taken as a starting point. This simplified partial differential equation method makes calculations easier. The anamorphic surface and the XY polynomial freeform surface are used in the two freeform mirrors for improving the image quality, respectively. The optimization strategy is also described in detail. The final HMD system operates at F/3.75 with 8mm exit pupil diameter achieving good imaging performance.

Citation Download Citation

Congshan Rui, Chunmei Zeng, Tiantian Hu, and Suodong Ma "Design of a head-mounted display with freeform mirrors", Proc. SPIE 11104, Current Developments in Lens Design and Optical Engineering XX, 1110402 (30 August 2019); https://doi.org/10.1117/12.2531787

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