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1 November 2023 Topology optimization of natural frequency in rotating-mirror structure for the ultra-high-speed camera
Chunbo Li, Kai Zhou, Shoujun Chen, Huan Yang, Can Yang
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Proceedings Volume 12917, International Conference on Precision Instruments and Optical Engineering (PIOE 2023); 1291701 (2023) https://doi.org/10.1117/12.3010818
Event: 3rd International Conference on Precision Instruments and Optical Engineering (PIOE 2023), 2023, Shanghai, China
Abstract
Polyhedron rotating scanning mirror (PRM) has very important applications in the fields of ultra-high-speed cameras, ultrashort pulse micro/nano machining, laser scanning, and Q-switching. The natural frequency of PRM is crucial for PRM design. In this paper, the application of a topology-optimization technique to improve the fundamental natural frequency of PRM for ultra-high-speed cameras was proposed based on the solid isotropic material with the penalization method and the method of moving asymptotes to investigate the structural optimization design. Moreover, the internal structure of the PRM was optimized based on the pseudo-density distribution. In the optimized structure, the three sharp corners with smaller pseudo-density material were removed and replaced by three irregular holes and three circular apertures with the same radius. Under identical conditions, the first natural frequency of the optimization structure was promoted from 4, 746.3 Hz to 5, 366.1 Hz, increased by 13.1%, which represents an obvious improvement in the image quality obtained by using ultra-high-speed cameras. The topology-optimization model and corresponding methodology reported herein provide a perspective and application area to effectively improve the fundamental frequency of a PRM without changing the external structure of this component
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Chunbo Li, Kai Zhou, Shoujun Chen, Huan Yang, and Can Yang "Topology optimization of natural frequency in rotating-mirror structure for the ultra-high-speed camera", Proc. SPIE 12917, International Conference on Precision Instruments and Optical Engineering (PIOE 2023), 1291701 (1 November 2023); https://doi.org/10.1117/12.3010818
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KEYWORDS
Cameras
Vibration
Mirrors
Mathematical optimization
Design and modelling
Materials properties
Structural design
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