Virtual Reality Head-Mounted Display with Large Field of View Based on Stitching

Chihao Lu; Haifeng Li; Tao Gao; Liang Xu; Haili Li

doi:10.3788/AOS201939.0612002

Acta Optica Sinica, Volume. 39, Issue 6, 0612002(2019)

Virtual Reality Head-Mounted Display with Large Field of View Based on Stitching

Chihao Lu^1,2, Haifeng Li^1,2、*, Tao Gao^3,4, Liang Xu^1,2, and Haili Li^1,2

Author Affiliations

¹ State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, Zhejiang 310027, China

² College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China

³ State Key Lab of CAD & CG, Zhejiang University, Hangzhou, Zhejiang 310027, China;

⁴ College of Computer Science and Technology, Zhejiang University, Hangzhou, Zhejiang 310027, China

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Figures & Tables(16)

Fig. 1. Division of virtual reality HMD device

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Fig. 2. Framework of virtual reality HMD device

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Fig. 3. Optical structure of monocular optical subsystem

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Fig. 4. Exit pupil drift position of monocular optical subsystem

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Fig. 5. Grid graph of distortion of monocular optical subsystem

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Fig. 6. Flow chart of establishment of mapping from space point to object plane

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Fig. 7. Mapping relationship between space point and image plane

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Fig. 8. Perspective projection

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Fig. 9. Definition of lens geometric distortion. (a) Barrel distortion; (b) pillow distortion

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Fig. 10. Photos of virtual reality HMD device. (a) Optical lens; (b) whole device

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Fig. 11. Photos on each plane during rendering. (a) Photos of image plane; (b) photos of object plane

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Fig. 12. Photos from CCD, taken at different angles. (a) Part of scene from left eye, with CCD turning to left; (b) part of scene from left eye, with CCD straight ahead; (c) part of scene from right eye, with CCD straight ahead; (d) part of scene from right eye, with CCD turning to right

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Fig. 13. Stitching effect. (a) Stitching effect of proposed device with left screen lit; (b) stitching effect of proposed device with right screen lit; (c) stitching effect of proposed device; (d) stitching effect of similar device

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Table 1. Initial structure parameters of monocular optical subsystem
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Table 1. Initial structure parameters of monocular optical subsystem
Surface Radius /mm Thickness /mm Glass (index Nd;abbe:Vd)
0(OBJ) Infinity -3000
1(STO) Infinity 15
2 99.1654 8.1950 PMMA(1.49;57.44)
3 521.3778 17.1257
4 -41.2608 12.3331 PMMA(1.49;57.44)
5 -38.6707 13.4537
6(IMA) Infinity -

Table 2. High-order coefficient parameter of aspheric surface
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Table 2. High-order coefficient parameter of aspheric surface
Surface α₂ /10^-2 α₄ /10^-6 α₆ /10^-9 α₈ /10^-12
2 0.33 -7.33 2.49 -0.74
3 -1.08 -15.10 5.35 -3.56
4 3.67 -6.89 11.30 -6.26
5 3.27 3.02 -16.10 8.29

Table 3. Parameters of virtual reality HMD
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Table 3. Parameters of virtual reality HMD
Parameter Value
Resolution of AMOLED /(pixel×pixel) 1080×1200
Distortion parameter k₁/10^-6 1.17111
Distortion parameter k₂/10^-13 -9.8186
Magnification β 78.82

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Chihao Lu, Haifeng Li, Tao Gao, Liang Xu, Haili Li. Virtual Reality Head-Mounted Display with Large Field of View Based on Stitching[J]. Acta Optica Sinica, 2019, 39(6): 0612002

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