Yang-liu ZHANG, Zhou-ping SU, Hong-xiang PAN, Xing-tao CHEN, Wen-yu ZHANG. Optical Design and Tolerance Analysis of Freeform Automotive Head-up Display[J]. Acta Photonica Sinica, 2020, 49(9): 0922002
- Acta Photonica Sinica
- Vol. 49, Issue 9, 0922002 (2020)
Fig. 1. Schematic diagram of HUD optical system
Fig. 2. 3D view of HUD optical system
Fig. 3. 2D view of reflective system of HUD
Fig. 4. The calculation of sample points on freeform surface
Fig. 5. The initial layout of HUD optical system
Fig. 6. The MTF plots of the HUD initial optical layout at different sampling ray intervals
Fig. 7. Spot diagram and distortion curve of the initial HUD system
Fig. 8. The optimized HUD optical system
Fig. 9. Spot diagram of HUD optical system after optimization
Fig. 10. The MTF plot of the final HUD optical system
Fig. 11. HUD optical system with multi-configurations
Fig. 12. MTF plots and distortion curves of human eyes at five typical positions in Eyebox
Fig. 13. MTF plots and distortion curves corresponding to the positions with the worst image quality when the Eyebox moves forward and backward by 70 mm
Fig. 14. MTF distributions of eight samples of two freeform surfaces under their PV values
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Table 1. Design parameters of an HUD optical system
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