Journal of Applied Optics, Volume. 44, Issue 6, 1294(2023)
Design of ultra-short focal miniature projection lens based on DMD
Figures & Tables(12)
Fig. 1. Summary of diffraction efficiency of DMD chips with different pixel sizes in visible light band
Table 1. Design indices of system
View tableView in ArticleTable 1. Design indices of system
系统参数 设计指标 波长/nm 380～760（可见光波段） 焦距/mm 1.65 视场角/(°) 149 F/# 1.7 投射比 0.16 相对畸变/% ≤3 MTF(@93 lp/mm) ≥0.3
Table 2. Basic parameters of each lens
View tableView in ArticleTable 2. Basic parameters of each lens
表面编号 表面类型 曲率半径/mm 厚度/mm 材料 热膨胀系数(×10−6/℃) 1 偶次非球面 26.004 3.036 N-BAF10 6.18 2 标准面 7.731 10.456 3 偶次非球面 38.687 4.281 H-LAF1 7.1 4 偶次非球面 9.674 15.546 5 标准面 −32.66 6.061 LASF14A 5.9 6 标准面 4.134 7.047 H-ZLAF57 7.3 7 标准面 −23.921 7.509 8 光阑 Infinite 0 —— 9 标准面 50.075 5.677 SF59 9.8 10 标准面 8.680 4.367 H-LAK50 6.3 11 标准面 −11.789 0.905 12 标准面 14.998 3.356 H-LAF1 7.1 13 标准面 −57.912 1.257 14 标准面 Infinite 7.000 H-K9L 7.6 15 标准面 Infinite 1.000 16 标准面 Infinite 1.000 BK7 7.1 17 标准面 Infinite 1.000
Table 3. Surface shape parameters of aspheric surface
View tableView in ArticleTable 3. Surface shape parameters of aspheric surface
表面编号 K A4 A6 A8 A10 1 −2.282 −2.969×10−6 −7.334×10−8 −2.721×10−10 7.211×10−12 3 −0.266 −7.181×10−4 −2.206×10−7 −4.458×10−8 8.935×10−10 4 −0.860 −2.080×10−4 −6.826×10−6 −3.028×10−7 6.533×10−9
Table 4. MTF of system at 93 lp/mm at 0～60 ℃
View tableView in ArticleTable 4. MTF of system at 93 lp/mm at 0～60 ℃
温度/℃ 子午MTF(@93 lp/mm) 弧矢MTF(@93 lp/mm) 0 0.650 0.716 10 0.661 0.718 20 0.667 0.719 30 0.666 0.720 40 0.663 0.708 50 0.660 0.696 60 0.651 0.678
Table 5. Tolerance values of system
View tableView in ArticleTable 5. Tolerance values of system
参数 设定值 TFRN/fringes 3 TTHI/mm 0.02 TSDY/mm 0.01 TSTY/（°） 0.0167 TEDY/mm 0.01 TETY/（°） 0.05
Table 6. Tolerance analysis results
View tableView in ArticleTable 6. Tolerance analysis results
比例/% MTF(>) 90 0.545 80 0.594 50 0.667 20 0.709 10 0.728
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Wei DING, Jiegen YANG, Feng HU, Liner ZOU. Design of ultra-short focal miniature projection lens based on DMD[J]. Journal of Applied Optics, 2023, 44(6): 1294
Paper Information
Category: Research Articles
Received: Nov. 15, 2022
Accepted: --
Published Online: Mar. 12, 2024
The Author Email: ZOU Liner (邹林儿)
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