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Acta Optica Sinica, Volume. 43, Issue 15, 1522001(2023)

Design Method of Ultrashort Focal Polarization Catadioptric Virtual Reality Lenses

Dewen Cheng1,2、*, Yilun Huang1,2, Yang Li1,2, Qichao Hou1,2, Danyang Li1,2, Tian Zhang1,2, Hailong Chen1,2, and Yongtian Wang1,2
Author Affiliations
  • 1School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
  • 2Beijing Engineering Research Center of Mixed Reality and Advanced Display, Beijing 100081, China
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    AbstractGet PDF(in Chinese)
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    Figures & Tables(15)
    Design comparison. (a) Schematic diagram and spot diagram of catadioptrical lens design; (b) schematic diagram and spot diagram of traditional transmission lens design

    Fig. 1. Design comparison. (a) Schematic diagram and spot diagram of catadioptrical lens design; (b) schematic diagram and spot diagram of traditional transmission lens design

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    Schematic diagram of normal imaging light path and straight-through stray light path within ultrashort focal polarization catadioptric VR lens system based on semi transparent and semi reflective film

    Fig. 2. Schematic diagram of normal imaging light path and straight-through stray light path within ultrashort focal polarization catadioptric VR lens system based on semi transparent and semi reflective film

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    Schematic diagram of light polarization state regulation within ultrashort focal polarization catadioptric VR lens system[26]

    Fig. 3. Schematic diagram of light polarization state regulation within ultrashort focal polarization catadioptric VR lens system[26]

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    Optical path diagram of three-slice ultrashort focal polarization catadioptric VR lens[26]

    Fig. 4. Optical path diagram of three-slice ultrashort focal polarization catadioptric VR lens[26]

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    Initial structure of three-slice ultrashort focal polarization catadioptric VR lens[26]

    Fig. 5. Initial structure of three-slice ultrashort focal polarization catadioptric VR lens[26]

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    Annular stitched aspheric surface with two zones. (a) XOY view of stitched surface; (b) YOZ view of stitched surface

    Fig. 6. Annular stitched aspheric surface with two zones. (a) XOY view of stitched surface; (b) YOZ view of stitched surface

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    Annular stitched aspheric surface based on NSS mode

    Fig. 7. Annular stitched aspheric surface based on NSS mode

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    Design results of ultrashort focal polarization catadioptric VR lens with common aspheric surface. (a) Structure diagram; (b) distortion grid; (c) lateral chromatic aberration curve; (d) MTF curve

    Fig. 8. Design results of ultrashort focal polarization catadioptric VR lens with common aspheric surface. (a) Structure diagram; (b) distortion grid; (c) lateral chromatic aberration curve; (d) MTF curve

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    Design results of ultrashort focal polarization catadioptric VR lens with stitched aspheric surface. (a) Structure diagram; (b) distortion grid; (c) lateral chromatic aberration curve; (d) MTF curve before automatic image performance balancing; (e) MTF curve after automatic image performance balancing

    Fig. 9. Design results of ultrashort focal polarization catadioptric VR lens with stitched aspheric surface. (a) Structure diagram; (b) distortion grid; (c) lateral chromatic aberration curve; (d) MTF curve before automatic image performance balancing; (e) MTF curve after automatic image performance balancing

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    Design results of ultrashort focal polarization catadioptric VR lens with large field of view. (a) Structure diagram of ultrashort focal polarization catadioptric VR lens with common aspheric surface; (b) MTF curve of ultrashort focal polarization catadioptric VR lens with common aspheric surface; (c) structure diagram of ultrashort focal polarization catadioptric VR lens with stitched aspheric surface; (d) MTF curve of ultrashort focal polarization catadioptric VR lens with stitched aspheric surface

    Fig. 10. Design results of ultrashort focal polarization catadioptric VR lens with large field of view. (a) Structure diagram of ultrashort focal polarization catadioptric VR lens with common aspheric surface; (b) MTF curve of ultrashort focal polarization catadioptric VR lens with common aspheric surface; (c) structure diagram of ultrashort focal polarization catadioptric VR lens with stitched aspheric surface; (d) MTF curve of ultrashort focal polarization catadioptric VR lens with stitched aspheric surface

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    Production flow chart of ultrashort focal polarization catadioptric VR optical module

    Fig. 11. Production flow chart of ultrashort focal polarization catadioptric VR optical module

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    Prototype module of ultra short focus catadioptric VR lens. (a) Photograph of appearance; (b) internal structure diagram; (c) comparison of ultrashort focal polarization catadioptric VR lens and traditional straight-through VR lens

    Fig. 12. Prototype module of ultra short focus catadioptric VR lens. (a) Photograph of appearance; (b) internal structure diagram; (c) comparison of ultrashort focal polarization catadioptric VR lens and traditional straight-through VR lens

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    Experimental results. (a) High-contrast picture with pre-distortion correction; (b) high-contrast image displayed by VR lens; (c) color picture with pre-distortion correction; (d) color image displayed by VR lens

    Fig. 13. Experimental results. (a) High-contrast picture with pre-distortion correction; (b) high-contrast image displayed by VR lens; (c) color picture with pre-distortion correction; (d) color image displayed by VR lens

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    • Table 1. Specifications of ultra short focus catadioptric VR lens

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      Table 1. Specifications of ultra short focus catadioptric VR lens

      SpecificationValue
      Field of view47°
      Screen size0.9 cm
      Image height9 mm
      Optical clear aperture22 mm
      Focal length10.8 mm
      Overall length9.5 mm
      Exit pupil diameter8 mm
      Eye relief12 mm
      Distortion<3%
      Modulation transfer function>0.5 @30 lp/mm
      Material3P
      Weight< 4 g

    • Table 2. Specifications of ultrashort focal polarization catadioptric VR lens with large field of view

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      Table 2. Specifications of ultrashort focal polarization catadioptric VR lens with large field of view

      SpecificationValue
      Field of view96°
      Screen size2.1 inch
      Overall length22 mm
      Exit pupil diameter8 mm
      Eye relief15 mm
      Distortion< 28%
      Modulation transfer function>0.45 @30 lp/mm
      Material3P
      Weight< 33 g
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    Dewen Cheng, Yilun Huang, Yang Li, Qichao Hou, Danyang Li, Tian Zhang, Hailong Chen, Yongtian Wang. Design Method of Ultrashort Focal Polarization Catadioptric Virtual Reality Lenses[J]. Acta Optica Sinica, 2023, 43(15): 1522001

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    Paper Information

    Category: Optical Design and Fabrication

    Received: Mar. 30, 2023

    Accepted: May. 22, 2023

    Published Online: Aug. 18, 2023

    The Author Email: Cheng Dewen (cdwlxk@bit.edu.cn)

    DOI:10.3788/AOS230757

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology