期刊
ADVANCED MATERIALS
卷 30, 期 18, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201705683
关键词
high-speed 3D printing; millimeter-size customized aspheric imaging lenses; projection micro-stereolithography; sub 7 nm surface roughness
类别
资金
- National Science Foundation (NSF) [EEC-1530734, DBI-1353952]
- Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource [NSFECCS-1542205]
- MRSEC program at the Materials Research Center [NSFDMR-1121262]
- International Institute for Nanotechnology (IIN)
- Keck Foundation
- State of Illinois, through the IIN
Advancements in three-dimensional (3D) printing technology have the potential to transform the manufacture of customized optical elements, which today relies heavily on time-consuming and costly polishing and grinding processes. However the inherent speed-accuracy trade-off seriously constrains the practical applications of 3D-printing technology in the optical realm. In addressing this issue, here, a new method featuring a significantly faster fabrication speed, at 24.54 mm(3) h(-1), without compromising the fabrication accuracy required to 3D-print customized optical components is reported. A high-speed 3D-printing process with subvoxel-scale precision (sub 5 mu m) and deep subwavelength (sub 7 nm) surface roughness by employing the projection micro-stereolithography process and the synergistic effects from grayscale photopolymerization and the meniscus equilibrium post-curing methods is demonstrated. Fabricating a customized aspheric lens 5 mm in height and 3 mm in diameter is accomplished in four hours. The 3D-printed singlet aspheric lens demonstrates a maximal imaging resolution of 373.2 lp mm(-1) with low field distortion less than 0.13% across a 2 mm field of view. This lens is attached onto a cell phone camera and the colorful fine details of a sunset moth's wing and the spot on a weevil's elytra are captured. This work demonstrates the potential of this method to rapidly prototype optical components or systems based on 3D printing.
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