Abstract
Free-form optical elements are more and more broadly used in modern optical systems due to their distinctive characteristics. In order to realize the high-precision manufacturing of free-form optical element, the constraints on parameters of manufacture and measurement were established based on the designing parameters of free-form optical element. Meanwhile, the evaluation system for the machinability and detectability of free-form optical element was obtained by means of the corresponding mathematical model. Furthermore, the White Light Interference (WLI) stitching detection technology, coupled with the least square multi-parameter optimization algorithm, was used to solve shape-error measurement of free-form optical element. Additionally, a free-form surface compensation manufacturing mechanism of asymmetric shape error was established. Based on the above methods, the polynomial free-form optics were processed and measured. According to the surface shape measurement results, the same element was processed with compensation manufacturing twice. The surface shape precision was obviously improved from PV = 2553 nm and RMS = 481 nm to PV = 214 nm and RMS = 19.9 nm, which verified the effectiveness of the method. A significant value was unfolded in the engineering application of this method.
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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.
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Acknowledgements
The authors thank Mr.Wang Shouyi for his help in the experiments.
Funding
Key Industry Innovation Chain Project of Shaanxi Provincial Science and Technology Department (2021ZDLGY12-05); Basic Scientific Research (JCKY2020426B009); Project of Shaanxi Provincial Science and the Technology Department (2022GY-222); “Belt and Road” Innovative Talent Exchange Program for foreign experts(DL2022040006L); Science and Technology on Transient Impact Laboratory Foundation(6142606203209).
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Shijie Li: conceptualization, writing — original draft, methodology, formal analysis, project administration; Yuetian Huang: writing — original draft, data curation, visualization; Fengyuan Zhao: project administration; Chen Yang: writing — review and editing, validation, software; Jin Zhang: writing — review and editing, validation; Haifeng Liang: investigation, supervision; Changlong Cai: funding acquisition, supervision; Wuiguo Liu: resources, funding acquisition.
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Li, S., Huang, Y., Zhao, F. et al. Establishment and analysis of feasibility evaluation system and ultra-precision manufacturing technology for small aperture free-form surface optical element. Int J Adv Manuf Technol 127, 2299–2308 (2023). https://doi.org/10.1007/s00170-023-11651-3
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DOI: https://doi.org/10.1007/s00170-023-11651-3