Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Design of Diffraction Limited Head Mounted Display Optical System Based on High Efficiency Diffractive Elements

  • Received : 2016.09.19
  • Accepted : 2017.03.08
  • Published : 2017.04.25
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Abstract

A diffraction limited optical system for head mounted displays (HMDs) was designed. This optical system consists of four modules, including 1:5 mm and 5:30 mm beam expanders, polarization grating-polarization conversion system (PG-PCS) and refractive/diffractive projection optical module. The PG-PCS module transforms the unpolarized Gaussian beam to a linearly polarized beam and it simultaneously homogenizes the spatial intensity profile. The optical projector module has a $30^{\circ}$ field of view, a 22 mm eye relief, and a 10 mm exit pupil diameter with a compact structure. Common acrylic materials were utilized in the optical design process; therefore, the final optical system was lightweight. The whole optical system is suitable for a 0.7 inch liquid crystal on silicon microdisplay (LCOS) with HDTV resolution ($1920{\times}1080$) and $8.0{\mu}m$ pixel pitch.

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References

  1. Q. L. Zhao, Z. Q. Wang, and T. G. Liu, "Design of optical system for head mounted micro display," Optic 118, 29-33 (2007).
  2. H. L. X. Zhang, G. Shi, H. Qu, Y. Wu, and J. Zhang, "Review and analysis of avionic helmet-mounted displays," Opt. Eng. 52, 110901 (2013). https://doi.org/10.1117/1.OE.52.11.110901
  3. J. Wang, Y. Liang, and M. Xu, "Design of a see-through head-mounted display with a freeform surface," J. Opt. Soc. Korea 19, 614-618 (2015). https://doi.org/10.3807/JOSK.2015.19.6.614
  4. J. Wang, Y. Liang, and M. Xu, "Design of a low distortion head-mounted display with freeform reflective mirror based on two ellipsoids structure," J. Opt. Soc. Korea 20, 234-238 (2016). https://doi.org/10.3807/JOSK.2016.20.2.234
  5. Q. L. Zhao, Z. Q. Wang, H. Q. Guo, Q. Sun, and Z. W. Lu, "Head-mounted display with LCOS using diffractive optical element," Optic 115, 11-14 (2004).
  6. X. J. Yang, Z. Q. Wang, and R. L. Fu, "Hybrid diffractiverefractive $67^{\circ}$ diagonal field of view optical see-through head-mounted display," optic 116, 351-355 (2005).
  7. E. Seo, H. Ch. Kee, Y. Kim, M. J. Escuti, "Polarization conversion system using a polymer polarization grating," SID 11 DIGEST, 540-543 (2011).
  8. M. J. Escuti, R. K. Komanduri, J. Kim, and K. F. Lawler, "Polarization conversion systems with polarization gratings and related fabrication Methods," U.S. Patent, US 2014 0285878 A1 (2014).
  9. LIGHTTRANS software, GMBH, http://www.lighttrans.com
  10. E. N. Kruszelnicki, J. Kędzierski, and Z. Raszewski, "High birefringence liquid crystal mixtures for electro-optical devices," Opt. Appl. XLII, 167-180 (2012).
  11. J. Kim, J. H. Na, and S. D. Lee, "Fully continuous liquid crystal diffraction grating with alternating semi-circular alignment by imprinting," Opt. Express 20, 3034-3042 (2012). https://doi.org/10.1364/OE.20.003034