Ying Cheng, Kang Liu, Hangyu Xu. Design of Ultrashort-Throw Projection Imaging System Based on Catadioptric Coupling[J]. Laser & Optoelectronics Progress, 2023, 60(16): 1611002
- Laser & Optoelectronics Progress
- Vol. 60, Issue 16, 1611002 (2023)
Fig. 1. Schematic of catadioptric ultrashort-throw projection optical system
Fig. 2. Schematic of coupling point error calculation
Fig. 3. Process of building the initial structure
Fig. 4. Variation of coupling deviation of each field-of-view before and after controlling coupling deviation
Fig. 5. Variation of spot radius of each field-of-view before and after controlling coupling deviation
Fig. 6. Spot radius of the initial structure and the forward final optical system
Fig. 7. Relative distortion of the initial structure
Fig. 8. Flow chart of overall optimization
Fig. 9. Comparison of coupling deviation. (a) Initial structural coupling deviation; (b) positive final coupling deviation
Fig. 10. Final optical system structure
Fig. 11. Spot radius of reverse final optical system
Fig. 12. Distortion of the reverse final optical system. (a) Relative distortion; (b) grid distortion
Fig. 13. MTF curve of the reverse final optical system
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Table 1. Technical parameters of ultrashort-throw projection optical system
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Table 2. Structural parameters of optical system
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Table 3. Aspheric coefficient of reflector
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Table 4. Coefficient of even aspheric surface
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