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Materials Science in Additive Manufacturing Biomimetic structures for optical focusing

the BLES structure can reduce the light reflection on the Funding
satellite surface, which can realize satellite stealth in the
optical band. On the other hand, BLES can collect multi- This work was supported by the National Key
angle incident light, thus improving the efficiency of light Research and Development Program of China (Grant
collection of the satellite. If solar panels are placed at the No. 2021YFB1715400), National Natural Science
BLES focal point inside the satellite, it can improve the Foundation of China (Grant No. 52225503), Key Research
utilization rate of sunlight. Finally, BLES is a lightweight and Development Program of Jiangsu Province (Grant
Nos. BE2022069 and BE2022069-1), National Natural
porous structure, which can reduce the overall quality and Science Foundation of China for Creative Research
launch cost of the satellite. The satellite skin was successfully Groups (Grant No. 51921003), and Postgraduate Research
prepared using LPBF (Figure 10B and C), which verified the & Practice Innovation Program of Jiangsu Province (Grant
feasibility of the above potential application in processing No. KYCX21-0207).
technology.
4. Conclusions Conflict of interest
The authors declare that they have no known competing
In this paper, BLES was successfully manufactured financial interests or personal relationships that could have
using the LPBF process, and the influence of structure appeared to influence the work reported in this paper.
parameters on the optical focusing performance of BLES
was systematically studied. Meanwhile, the motion Author contributions
behavior of incident light in the microchannel of BLES was
revealed. The main conclusions are as follows: Conceptualization: Luhao Yuan, Dongdong Gu, Kaijie Lin
Data curation: Luhao Yuan, Xinyu Shi
1) The highest relative density of 99.98% can be obtained Formal analysis: He Liu, Han Zhang, Xin Liu
at a laser power of 400 W and scanning speed of Investigation: Luhao Yuan, Dongdong Gu, Kaijie Lin
2200 mm/s. The upper profile in each microchannel Methodology: Luhao Yuan, Dongdong Gu
formed by LPBF was regular, and the wall thickness Supervision: He Liu, Xin Liu, Jianfeng Sun
of which was larger than that of the design value. The Visualization: Luhao Yuan, Dongdong Gu, Xinyu Shi
LPBF-processed BLES showed low surface roughness Writing – original draft: Luhao Yuan, Dongdong Gu
and adhered powders and be observed on the side Writing – review & editing: Luhao Yuan, Dongdong Gu.
surface.
2) The experimental results show that there was a bright Ethics approval and consent to participate
central focal facula existence on the focus plate of each Not applicable.
LPBF-processed BLES. The light-collecting ability of
LPBF-processed BLES was decreased with the increase Consent for publication
of UWM, and samples with small UWM (1.0 mm and
1.25 mm) had a good light-focusing ability. Not applicable.
3) The number of light reflections in the microchannel Availability of data
increased. In all analysis surfaces with light intensity,
the light intensity increased from top to bottom, and The authors confirm that the data supporting the findings
the light intensity on the analysis surface increased as of this study are available within the article.
the analysis surface was away from the center of BLES
(optical axis). References
1. Du Plessis A, Broeckhoven C, Yadroitsava I, et al., 2019,
The research illustrates that BLES with optical focusing Beautiful and Functional: A review of biomimetic design in
ability can be manufactured by the LPBF process. additive manufacturing. Addit Manuf, 27: 408–427.
Excellent optical focusing performance can be obtained by
optimizing the structure parameters of BLES, and reducing https://doi.org/10.1016/j.addma.2019.03.033
the size of the BLES microchannel is an effective way to 2. Ma C, Gu D, Lin K, et al., 2019, Selective laser melting
improve the optical focusing performance. In addition, additive manufacturing of cancer pagurus’s claw inspired
this paper proposes a potential application of BLES in bionic structures with high strength and toughness. Appl
satellites, expanding the optical application field of BLES. Surf Sci, 469: 647–656.
https://doi.org/10.1016/j.apsusc.2018.11.026
Acknowledgments
3. Yang J, Gu D, Lin K, et al., 2019, Optimization of bio-
None. inspired bi-directionally corrugated panel impact-resistance

Volume 2 Issue 2 (2023) 10 https://doi.org/10.36922/msam.0361