AccScience Publishing / MSAM / Volume 2 / Issue 2 / DOI: 10.36922/msam.0361
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Laser additive manufacturing of microchannel array structure inspired by lobster eyes: Forming ability and optical focusing performance

Luhao Yuan1 Dongdong Gu1* Kaijie Lin1 Xinyu Shi1 He Liu1 Han Zhang1 Xin Liu1 Jianfeng Sun1
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1 Jiangsu Provincial Engineering Laboratory for Laser Additive Manufacturing of High-Performance Metallic Components, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Yudao Street 29, Nanjing, 210016, China
Submitted: 27 March 2023 | Accepted: 10 May 2023 | Published: 22 June 2023
© 2023 by the Author(s). Licensee AccScience Publishing, Singapore. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( )

After millions of years of evolution, nature has evolved materials and structures with excellent performance and has provided a source of inspiration for designing high-performance structures. The bionic lobster eye structure (BLES) is a typical example of imitating the good light-focusing performance of lobster eyes. Here, the BLESs with different structural parameters were designed and fabricated by laser powder bed fusion (LPBF). The experimental results demonstrated that the highest relative density of 99.98% can be obtained at a laser power of 400 W and scanning speed of 2200 mm/s, and the upper profile in each microchannel formed under this parameter was regular. All BLESs exhibited a bright central focal facula with a diffuse background on the focus plate. The light-collecting ability of LPBF-processed BLES was decreased with the increase of the upper width of microchannel (UWM), and samples with a small UWM (1.0 mm and 1.25 mm) had a good light-focusing ability. The light intensity on the analysis surface increased as the analysis surface was away from the center of BLES (optical axis), which was detrimental to the optical focusing performance. The BLES could potentially be applied to satellites to improve the efficiency of light collection of the satellite while reducing the probability of being detected.

Additive manufacturing
Laser powder bed fusion
Bionic lobster eye structure
Optical focusing performance
This work was supported by the National Key Research and Development Program of China (Grant No. 2021YFB1715400), National Natural Science Foundation of China (Grant No. 52225503), Key Research and Development Program of Jiangsu Province (Grant Nos. BE2022069 and BE2022069-1), National Natural Science Foundation of China for Creative Research Groups (Grant No. 51921003), and Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. KYCX21-0207).
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Conflict of interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Materials Science in Additive Manufacturing, Electronic ISSN: 2810-9635 Print ISSN: TBA, Published by AccScience Publishing