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题名:
Thermal stability test and analysis of a 20-actuator bimorph deformable mirror
作者: Ning Yu1,2; Zhou Hong2,3; Yu Hao1,2; Rao Chang-Hui2; Jiang Wen-Han2
刊名: CHINESE PHYSICS B
出版日期: 2009-03-01
卷号: 18, 期号:3, 页码:1089-1095
关键词: adaptive optics ; bimorph deformable mirror ; thermal stability
文章类型: Article
英文摘要: One of the important characteristic of adaptive mirrors is the thermal stability of surface flatness. In this paper, the thermal stability from 13 degrees C to 25 degrees C of a 20-actuator bimorph deformable mirror is tested by a Shack-Hartmann wavefront sensor. Experimental results show that, the surface P-V of bimorph increases nearly linearly with ambient temperature. The ratio is 0.11 mu m/degrees C and the major component of surface displacement is defocused, compared with which, astigmatism, coma and spherical aberration contribute very small. Besides, a finite element model is built up to analyse the influence of thickness, thermal expansion coefficient and Young's modulus of materials on thermal stability. Calculated results show that bimorph has the best thermal stability when the materials have the same thermal expansion coefficient. And when the thickness ratio of glass to PZT is 3 and Young's modulus ratio is approximately 0.4, the surface instability behaviour of the bimorph manifests itself most severely.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Physics, Multidisciplinary
研究领域[WOS]: Physics
收录类别: SCI
语种: 英语
WOS记录号: WOS:000263912300042
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3258
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: 1.Natl Univ Def Technol, Coll Photon Elect Sci & Engn, Changsha 410073, Hunan, Peoples R China
2.Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Ning Yu,Zhou Hong,Yu Hao,et al. Thermal stability test and analysis of a 20-actuator bimorph deformable mirror[J]. CHINESE PHYSICS B,2009,18(3):1089-1095.
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