Laser & Optoelectronics Progress, Volume. 60, Issue 16, 1611002(2023)
Design of Ultrashort-Throw Projection Imaging System Based on Catadioptric Coupling
Figures & Tables(17)
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. 9. Comparison of coupling deviation. (a) Initial structural coupling deviation; (b) positive final coupling deviation
Fig. 12. Distortion of the reverse final optical system. (a) Relative distortion; (b) grid distortion
Table 1. Technical parameters of ultrashort-throw projection optical system
View tableTable 1. Technical parameters of ultrashort-throw projection optical system
Parameter Value Display chip size 0.37 inch，1920×1080 Screen size 100 inch（2540 mm） F-number 2.6 Projection ratio 0.22 Image offset 140% Telecentric degree <1° TV distortion horizontal<0.5%；vertical<0.4% MTF >0.5@117 lp/mm
Table 2. Structural parameters of optical system
View tableTable 2. Structural parameters of optical system
Surfuce Type Radius /mm Thickness /mm Material Surfuce Type Radius /mm Thickness /mm Material S0 Standard Infinity 486.860 — S14 Standard -20.269 -1.100 H-LAK54 S1 Odd asphere -145.132 -74.652 MIRROR S15 Standard -9.066 -2.671 D-LAK5 S2 Even asphere 17.724 -3.500 F52R S16 Standard 33.592 -0.116 — S3 Even asphere 66.033 -0.117 — STOP Standard Infinity -0.116 — S4 Standard -19.409 -5.487 H-ZF52 S18 Standard -112.211 -2.402 H-FK71 S5 Standard -51.029 -3.896 — S19 Standard 11.524 -1.100 TAFD55 S6 Standard 46.507 -5.139 FDS1 S20 Standard -29.148 -5.441 — S7 Standard -72.032 -2.939 — S21 Even asphere 160.592 -3.468 D-K9 S8 Standard 42.570 -2.155 D-LAF50 S22 Even asphere 11.473 -0.144 — S9 Standard -125.874 -5.329 — S23 Standard 40.344 -3.822 H-FK61 S10 Standard 29.217 -4.294 F3 S24 Standard 11.392 -3.334 TAFD55 S11 Standard 17.373 -11.000 — S25 Standard 15.662 -0.145 — S12 Standard -32.682 -4.099 ZF13 S26 Standard 110.797 -1.997 H-ZF88 S13 Standard -445.750 -10.938 — S27 Standard 34.345 -5.000 —
Table 3. Aspheric coefficient of reflector
View tableTable 3. Aspheric coefficient of reflector
Order Conic 2th order term 3th order term 4th order term Aspheric coefficient 5.986 -0.015 -2.171×10-4 2.482×10-5 Order 5th order term 6th order term 7th order term 8th order term Aspheric coefficient -8.655×10-7 1.536×10-8 -1.377×10-10 4.469×10-13
Table 4. Coefficient of even aspheric surface
View tableTable 4. Coefficient of even aspheric surface
Order S2 S3 S21 S22 Conic 0.034 9.727 0 0 4th order term -1.584×10-4 -1.239×10-4 7.708×10-5 -2.909×10-5 6th order term 1.896×10-6 1.869×10-6 7.018×10-7 3.206×10-7 8th order term -1.942×10-8 -2.136×10-8 -2.645×10-8 -2.236×10-9 10th order term 1.208×10-10 1.565×10-10 1.222×10-10 -1.283×10-10 12th order term -4.768×10-13 -7.472×10-13 0 0 14th order term 1.077×10-15 2.074×10-15 0 0 16th order term -1.077×10-18 -2.545×10-18 0 0
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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
Paper Information
Category: Imaging Systems
Received: Aug. 12, 2022
Accepted: Nov. 2, 2022
Published Online: Aug. 18, 2023
The Author Email: Ying Cheng (ycheng@tust.edu.cn)
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