Design of a Low Distortion Head-Mounted Display with Freeform Reflective Mirror Based on Two Ellipsoids Structure

Wang, Junhua;Liang, Yuechao;Xu, Min

  • Received : 2016.01.13
  • Accepted : 2016.03.08
  • Published : 2016.04.25


A new method to design a low distortion, even relative illumination, optical see-through head-mounted display (HMD) with a freeform reflective mirror (FFRM) based on the two similar ellipsoids structure is proposed. The HMD we have realized has a simple structure which consists of two similar ellipsoid surfaces, an FFRM, a 7-piece co-axis relay lens, and an OLED. This structure can be applied to offset distortion, reach even relative illumination, and correct the off-axis aberrations. The HMD we finally have realized has a near 3% low distortion, a higher than 80% relative illumination, and a 40°×30° field of view (FOV).


Head-mounted display;FFRM;Two ellipsoids structure


  1. Y. Ding, "Design of freeform optical devices and their applications in illumination systems," Ph. D. Thesis, Zhejiang University, China (2009), pp. 25-29.
  2. J. A. Piao, G. Li, M. L. Piao, and N. Kim, “Full color holographic optical element fabrication for waveguide-type head mounted display using photopolymer,” J. Opt. Soc. Korea 17, 242-248 (2013).
  3. H. Hua, X. D. Hu, and C. Y. Gao, “A high-resolution optical see-through head-mounted display with eyetracking capability,” Opt. Express 21, 30993-30998 (2013).
  4. X. D. Hu and H. Hua, “High-resolution optical see-through multi-focal-plane head-mounted display using freeform optics,” Opt. Express 22, 13896-13903 (2014).
  5. J. P. Rolland and F. Henry, “Optical versus video see-through head-mounted displays in medical visualization,” Presence: Teleoperators and Virtual Environments 9, 287-309 (2000).
  6. Z. R. Zheng, X. Liu, H. F. Li, and L. Xu, “Design and fabrication of an off-axis see-through head-mounted display with an x-y polynomial surface,” Appl. Opt. 49, 3661-3668 (2010).
  7. H. C. Peng, D. W. Cheng, J. Han, C. Xu, W. T. Song, L. Z. Ha, J. Yang, Q. X. Hu, and Y. T. Wang, “Design and fabrication of a holographic head-up display with asymmetric field of view,” Appl. Opt. 53, 177-185 (2014).
  8. A. Bauer, S. Vo, K. Parkins, F. Rodriguez, O. Cakmakci, and J. P. Rolland, “Computational optical distortion correction using a radial basis function-based mapping method,” Opt. Express 20, 14906-14920 (2012).
  9. J. M. Yang, W. Q. Liu, W. Z. Lv, D. L. Zhang, F. He, Z. L. Wei, and Y. S. Kang, “Method of achieving a wide field-of-view head-mounted display with small distortion,” Opt. Lett. 38, 2035-2037 (2013).
  10. H. Gross, Handbook of Optical Systems (Wiley Press, Germany, 2005), vol. 1, pp. 475-479.