Author Affiliations
1 College of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun, Jilin 130022, China2 Key Laboratory of Fundamental Science for National Defense of Aero and Ground Laser Communication Technology, Changchun University of Science and Technology, Changchun, Jilin 130022, Chinashow less
Fig. 1. Reflective optical system
Fig. 2. Overall structure diagram
Fig. 3. Diagram of horizontal FOV size
Fig. 4. Diagram of eyebox size
Fig. 5. Component location diagram
Fig. 6. Optical path of reflection system
Fig. 7. 3D image of reflection system
Fig. 8. Reflection path diagram of windshield
Fig. 9. Optical transfer functions when human eyes are at different positions in the eyebox. (a) Upper limb; (b) middle; (c) lower limb
Fig. 10. Optical path of projection lens
Fig. 11. Optical transfer functions of projection lens
Fig. 12. RMS of projection lens
System parameter | Value |
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Display band | 486-656 nm | Highest brightness | 1500 nits | Light intensity contrast | 1.2 at 50% brightness | Resolution | HD (1280 pixel×<break/>720 pixel) | Distance from projection to<break/>diffuser screen (PD) | 123 mm | Distance between diffuser<break/>screen and mirror (DM) | 50 mm | Distance between mirror<break/>and combiner (MC) | 150 mm | Virtual image distance (VID) | 2500 mm | Eyebox size | 140 mm×60 mm | Distance between combiner<break/>and eyebox (CE) | 750 mm | Field of view | 12°×6.75° |
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Table 1. Optical design parameters
Parameter | Value |
---|
Wavelength range | 486-656 nm | Image resolution | 1280 pixel×720 pixel | Virtual image distance | 2500 mm | Eyebox | 140 mm×60 mm | Distance from eye to image | 750 mm | Field of view | 12°×6.75° |
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Table 2. Optical system parameters
Parameter | Value |
---|
Spectrum range | 486-656 nm | Focus | 10 mm | Field of view | 38.12°×22.01° | Image size | 6.91 mm×3.89 mm (7.93 mm) | <italic>F</italic> number | 4 | Length-width ratio | 16:9 | DMD | 0.3 inch (1 inch=2.54 cm) |
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Table 3. Optical design parameters