Dec. 2020

Article Contents

Chinese Optics> 2020> 13(6): 1352-1361.

ZHAO Yu, SU Cheng-zhi, ZHAO Gui-jun, YANG Guang. Structural optimization for the design of an ultra-lightweight SiC mirror with a diameter of 500 mm[J]. Chinese Optics, 2020, 13(6): 1352-1361. doi: 10.37188/CO.2019-0201

Citation:

ZHAO Yu, SU Cheng-zhi, ZHAO Gui-jun, YANG Guang. Structural optimization for the design of an ultra-lightweight SiC mirror with a diameter of 500 mm[J].Chinese Optics, 2020, 13(6): 1352-1361.doi:10.37188/CO.2019-0201

Citation:

ZHAO Yu, SU Cheng-zhi, ZHAO Gui-jun, YANG Guang. Structural optimization for the design of an ultra-lightweight SiC mirror with a diameter of 500 mm[J].Chinese Optics, 2020, 13(6): 1352-1361.doi:10.37188/CO.2019-0201

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Structural optimization for the design of an ultra-lightweight SiC mirror with a diameter of 500 mm

doi:10.37188/CO.2019-0201

1.
College of Mechanical Engineering, Changchun University of Science and Technology, Changchun 130000, China
2.
Changchun Up Optotech Co., Ltd., Changchun 130000, China

Funds:Supported by National Natural Science Foundation of China (No. 11873046)

More Information

Corresponding author:chengzhi_su@126.com
Received Date:22 Oct 2019
Rev Recd Date:17 Dec 2019

Available Online:09 Nov 2020

Publish Date:01 Dec 2020

Abstract

Abstract

To meet the performance requirements of ultra-lightweight Φ500 mm-reflector optical system in near diffraction limit, the structure of the reflector is studied using advanced CAE simulation and modern high-performance SiC fabrication technology. Firstly, mirror materials were selected by comparing the common materials and manufacturing processes of existing mirrors. Then, with regards to the structural characteristics of circular symmetrical reflectors, the structure of proposed reflector was designed based on integrated optimization of the full stiffness method. Finally, the reflector assembly was designed with a back-support structure. The simulation results show that the mass of proposed primary mirror is less than 5 kg and the surface density is less than 20 kg/m ². The surface errors (RMS value) of the three directions of dead weight deformation at 4 ℃ temperature rise are less than λ/50. The first-order resonance frequency of the primary mirror assembly is no less than 120 Hz and the stress at the weakest point as measured by dynamic response analysis is less than 100 MPa. The structural optimization of the mirror meets its design requirements, with a remarkable lightweight effect and a structure that is both stable and reliable.
- ultra-lightweight,
- back support,
- finite element simulation,
- equal stiffness design,
- integrated optimization

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References (11)

References

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