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Optical lenses require feature resolution and surface roughness that are beyond most (3D) printing methods. A new continuous projection‐based vat photopolymerization process is reported that can directly shape polymer materials into optical lenses with microscale dimensional accuracy (< 14.7 µm) and nanoscale surface roughness (< 20 nm) without post‐processing. The main idea is to utilize frustum...
Optical Lens Fabrication
In article number 2300517, Yong Chen and co‐workers introduce a continuous vat photopolymerization method for optical lens production. This approach achieves nanoscale surface roughness and microscale shape accuracy. Utilizing a zooming‐focused projection system, the authors continuously modify ultraviolet mask images, allowing for controlled frustum layer stacking and the...
3D printing technology has demonstrated great potential in fabricating flexible and customizable high‐performance batteries, which are highly desired in the forthcoming intelligent and ubiquitous energy era. However, a significant performance gap, especially in cycling stability, still exists between the 3D‐printed and conventional electrodes, seriously limiting the practical applications of 3D‐printed...
Hierarchical Microlattices
In article number 2206024, Huajian Gao, Xiaoyan Li, and co‐workers design and fabricate a new class of truss‐plate‐hybrid hierarchical lattices, which exhibit elastic isotropy and enhanced modulus and strength, outperforming all the existing truss‐based hierarchical lattices. This work exemplifies a route to harnessing hierarchical design principles to create architected...
Bioinspired hierarchical design principles have been employed to create advanced architected materials. Here, a new type of truss‐plate‐hybrid two‐level hierarchical architecture is created, referred to as the ISO‐COP hierarchical lattice (isotropic truss at the first level and cubic+octet plate at the second level), in which truss‐based unit cells are arranged according to the topology of the plate‐based...
3D objects with features spanning from microscale to macroscale have various applications. However, the fabrication of such objects presents challenges to additive manufacturing (AM) due to the tradeoffs among manufacturable feature resolution, maximum build area, and printing speed. This paper presents a projection‐based AM process called hopping light vat photopolymerization (HL‐VPP) to address...
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