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Proceedings Paper

Design of a head-mounted display with freeform mirrors
Author(s): Congshan Rui; Chunmei Zeng; Tiantian Hu; Suodong Ma
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Paper 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.

Paper Details

Date Published: 30 August 2019
PDF: 7 pages
Proc. SPIE 11104, Current Developments in Lens Design and Optical Engineering XX, 1110402 (30 August 2019); doi: 10.1117/12.2531787
Show Author Affiliations
Congshan Rui, Soochow Univ. (China)
Chunmei Zeng, Soochow Univ. (China)
Tiantian Hu, Soochow Univ. (China)
Suodong Ma, Soochow Univ. (China)

Published in SPIE Proceedings Vol. 11104:
Current Developments in Lens Design and Optical Engineering XX
R. Barry Johnson; Virendra N. Mahajan; Simon Thibault, Editor(s)

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