Acta Optica Sinica, Volume. 38, Issue 6, 0622001(2018)
Design of Laser Projection Display Illumination System Based on Freeform Surface Array
Fig. 1. Schematic of using freeform surface array to achieve uniform illumination
Fig. 2. (a) Illuminance distribution of the collimated laser; (b) illuminance distribution of the collimated laser through the freeform surface array
Fig. 4. Schematic diagram of unit vector of outgoing ray calculation at any point of freeform surface
Fig. 5. Topological relation of coordinate system between the freeform surface and the target surface
Fig. 7. Illuminance distribution at X=0 and Y=0 on the focal plane of convergent lens
Fig. 8. Illuminance maps of target surface corresponding to different lengths of round bar. (a) 60 mm; (b) 70 mm; (c) 80 mm
Fig. 9. (a) Illuminance distribution of the emergent light from combiner system; (b) latitude and (c) longitude distribution of the energy density of the emergent light from combiner system
Fig. 10. (a) Schematic of freeform surface unit uniform light; (b) normal vector error of the freeform surface model; (c) illuminance distribution of target surface; (d) illuminance curves at X=0 and Y=0 on the target surface
Fig. 12. (a) Relationship between target surface uniformity and array number of freeform surface units with different aspect ratios; (b) illuminance distribution and (c) energy distribution of the 4.5455 mm×4.5455 mm freeform surface lens; (d) illuminance distribution and (e) energy distribution of the 6.25 mm×3.515625 mm freeform surface lens
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Wei Zhao, Xu Liu, Haifeng Li. Design of Laser Projection Display Illumination System Based on Freeform Surface Array[J]. Acta Optica Sinica, 2018, 38(6): 0622001
Category: Optical Design and Fabrication
Received: Sep. 8, 2017
Accepted: --
Published Online: Jul. 9, 2018
The Author Email: Haifeng Li (lihaifeng@zju.edu.cn)