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Influence of low temperature on the surface deformation of deformable mirrors
You, Juncheng1,2,3; Guan, Chunlin1,2; Zhou, Hong1,2
2017
Source PublicationChinese Physics B
ISSN1674-1056
Volume26Issue:5Pages:054215
AbstractThe two factors which influence the low temperature performance of deformable mirrors (DMs) are the piezoelectric stroke of the actuators and the thermally induced surface deformation of the DM. A new theory was proposed to explain the thermally induced surface deformation of the DM: because the thermal strain between the actuators and the base leads to an additional moment according to the theory of plates, the base will be bent and the bowing base will result in an obvious surface deformation of the facesheet. The finite element method (FEM) was used to prove the theory. The results showed that the thermally induced surface deformation is mainly caused by the base deformation which is induced by the coefficient of thermal expansion (CTE) mismatching; when the facesheet has similar CTE with the actuators, the surface deformation of the DM would be smoother. Then an optimized DM design was adopted to reduce the surface deformation of the DMs at low temperature. The low temperature tests of two 61-element discrete PZT actuator sample deformable mirrors and the corresponding optimized DMs were conducted to verify the simulated results. The results showed that the optimized DMs perform well. © 2017 Chinese Physical Society and IOP Publishing Ltd.
KeywordActuators - Adaptive optics - Delta modulation - Finite element method - Laser pulses - Mirrors - Optical testing - Piezoelectric actuators - Temperature - Testing - Thermal effects - Thermal expansion
Indexed BySCI ; Ei
Language英语
Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/8798
Collection自适应光学技术研究室(八室)
Affiliation1.Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu; 610209, China;
2.Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China;
3.University of Chinese Academy of Sciences, Beijing; 100049, China
Recommended Citation
GB/T 7714
You, Juncheng,Guan, Chunlin,Zhou, Hong. Influence of low temperature on the surface deformation of deformable mirrors[J]. Chinese Physics B,2017,26(5):054215.
APA You, Juncheng,Guan, Chunlin,&Zhou, Hong.(2017).Influence of low temperature on the surface deformation of deformable mirrors.Chinese Physics B,26(5),054215.
MLA You, Juncheng,et al."Influence of low temperature on the surface deformation of deformable mirrors".Chinese Physics B 26.5(2017):054215.
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