Acta Optica Sinica, Volume. 42, Issue 5, 0508002(2022)
Numerical Aperture Optimization of Microlens for Curved Integral Imaging
Figures & Tables(11)
Fig. 2. Schematic of viewing angle and reconstructed depth of flexible microlens array
Fig. 4. Ray tracing of microlens array with different numerical apertures. (a) Reconstructed images of reconstruction screen without rotation in integral imaging 3D display system constructed by microlens array with different numerical apertures; (b) ray tracing of single microlens with numerical aperture of 0.015; (c) ray tracing of single microlens with numerical aperture of 0.075; (d) ray tracing of single microlens with numerical aperture of 0.494
Fig. 5. Reconstructed images of integral imaging 3D display system built by microlens arrays with different numerical apertures under different viewing angles. (a) Numerical aperture is 0.015; (b) numerical aperture is 0.061; (c) numerical aperture is 0.075; (d) numerical aperture is 0.148; (e1)--(e4) numerical aperture is 0.376; (f1)--(f4) numerical aperture is 0.494
Fig. 6. Total number of lights received by integral imaging system with microlens of different numerical aperture at different angles
Fig. 7. Relationship between numerical aperture of microlens on flexible substrate and TMCs processing time. (a) Unprocessed; (b) 20 min; (c) 55 min
Fig. 8. Imaging effect of 3D display system prototype built by microlens array with different numerical apertures. (a) Elemental image; (b) numerical aperture is 0.015; (c) numerical aperture is 0.061; (d) numerical aperture is 0.075
Table 1. Object distance, image distance, and ratio of object distance and image distance of microlens under different numerical apertures
View tableTable 1. Object distance, image distance, and ratio of object distance and image distance of microlens under different numerical apertures
Parameter 0.015 0.061 0.075 0.148 0.376 0.494 Height h /μm 10 40 50 100 300 650 Object distance g /mm 43.5 11.0 9.0 4.7 1.9 1.5 Image distance l /mm 2727 458 200 65 19 11 g/l 0.016 0.024 0.045 0.072 0.098 0.138
Table 2. Lens parameters at different numerical apertures
View tableTable 2. Lens parameters at different numerical apertures
Parameter 0.015 0.061 0.075 0.148 0.376 0.494 Height h/μm 10 40 50 100 300 650 f/mm 42.817 10.742 8.612 4.382 1.731 1.317
Table 3. Parameters of curved integral imaging system
View tableTable 3. Parameters of curved integral imaging system
Parameter Value Lens array size f /mm Diameter /mm Height /mm l /mm g /mm Radius of curvature /mm Thickness of pinhole array /mm Radius of pick-up curved/reconstructed curved microlens array /mm NA 11×9 1.317 1.3 0.65 11 1.5 0.65 0.0005 34.09 0.494
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Wenwen Wang, Xiongtu Zhou, Yongai Zhang, Chaoxing Wu, Zhixian Lin, Tailiang Guo. Numerical Aperture Optimization of Microlens for Curved Integral Imaging[J]. Acta Optica Sinica, 2022, 42(5): 0508002
Paper Information
Category: Geometric Optics
Received: Jun. 21, 2021
Accepted: Sep. 10, 2021
Published Online: Mar. 8, 2022
The Author Email: Zhou Xiongtu (xtzhou@fzu.edu.cn)
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