Fig. 1. Solid model of windshield

Fig. 2. Set-up of field of view

Fig. 3. Internal optical path structure of dual-light-path AR-HUD

Fig. 4. Actual structure of dual-light-path AR-HUD system

Fig. 5. Distribution diagram of pupil in the eyebox

Fig. 6. Spot diagrams at the center of the eyebox. (a) Spot diagrams at a projection distance of 2.5 m; (b) spot diagrams at a projection distance of 10 m

Fig. 7. MTF at the center of the eyebox. (a) MTF at a projection distance of 2.5 m; (b) MTF at a projection distance of 10 m

Fig. 8. Grid distortion at the center of the eyebox. (a) Grid distortion at a projection distance of 2.5 m; (b) grid distortion at a projection distance of 10 m

Fig. 9. Spot diagrams at the edge of the eyebox. (a) Spot diagrams at a projection distance of 2.5 m; (b) spot diagrams at a projection distance of 10 m

Fig. 10. MTF at the edge of eyebox. (a) MTF at a projection distance of 2.5 m; (b) MTF at a projection distance of 10 m

Fig. 11. Grid distortion at the edge of the eyebox. (a) Grid distortion at a projection distance of 2.5 m; (b) grid distortion at a projection distance of 10 m

Fig. 12. Process of image distance changing

Fig. 13. Variable distance curves. (a) Change of distance from S2 to PGU2; (b) change of distance from S3 to M

Fig. 14. Mirror distribution at imaging distances of 10 m and 20 m

Fig. 15. Image size changes in PGU. (a) Length change curve; (b) width change curve

Fig. 16. Worst results at imaging distance of 15 m. (a) Spot diagram; (b) MTF; (c) grid distortion

Fig. 17. Worst results at imaging distance of 20 m. (a) Spot diagram; (b) MTF; (c) grid distortion

Fig. 18. Near-field light path statistical figures of MTF values at 6 lp/mm. (a) Tangential; (b) sagittal

Fig. 19. Far-field light path statistical figures of MTF values at 6 lp/mm. (a) Tangential; (b) sagittal