Design of a polarized head-mounted projection display using FLCOS micro displays

Rui Zhang, Hong Hua

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

Abstract

Head-mounted projection display (HMPD) technology, as an alternative to conventional head mounted displays (HMD), offers the potential of designing wide field-of-view (FOV) optical see-through HMDs. Due to multiple passes through a beamsplitter, however, existing HMPD designs suffer from low luminance efficiency and thus the displayed image is lack of brightness and contrast. The design of a polarized head-mounted projection display (p-HMPD) was recently proposed. The major departure of a p-HMPD design from other existing HMPD systems is the usage of polarization management to minimize light loss through beamsplitting. A p-HMPD consists of a pair of projections lenses, microdisplays, polarization control elements, and retroreflective sheeting material as a projection screen. In this paper, we explore the usage of a ferroelectric liquid-crystal-on-silicon (FLCOS) microdisplay as the image source and present a compact design of an illumination unit with double telecentric optics to achieve highly bright and uniform illumination on the FLCOS microdisplay. The key contribution of this design lies in the compactness which is a critical factor in HMD systems. The first-order optics and the transformation of polarization in the design will be described in detail. The simulation of the illumination unit will be shown and its luminous efficiency and uniformity will be discussed. Based on this illumination engine, we will further describe the design of a compact projection lens and discuss the overall performance of the optics.

Original languageEnglish (US)
Title of host publicationProjection Displays XII
DOIs
StatePublished - 2007
EventProjection Displays XII - San Jose, CA, United States
Duration: Jan 24 2007Jan 25 2007

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6489
ISSN (Print)0277-786X

Other

OtherProjection Displays XII
CountryUnited States
CitySan Jose, CA
Period1/24/071/25/07

Keywords

  • Head-mounted display
  • Head-mounted projection display
  • Light engine
  • Projection lens

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Zhang, R., & Hua, H. (2007). Design of a polarized head-mounted projection display using FLCOS micro displays. In Projection Displays XII [64890B] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6489). https://doi.org/10.1117/12.701057