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题名:
Thermal stability test and analysis of a 20-actuator bimorph deformable mirror
作者: Ning Y; Zhou H; Yu H; et al.
刊名: CHINESE PHYSICS B
出版日期: 2009
卷号: 18, 期号:3, 页码:1089-1095
通讯作者: Ning Y
文章类型: 期刊论文
中文摘要: One of the important characteristic of adaptive mirrors is the thermal stability of surface flatness. In this paper, the thermal stability from 13°C to 25°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 0.11μm/°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.
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°C to 25°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 0.11μm/°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.
收录类别: SCI ; Ei
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/6121
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作者单位: 中国科学院光电技术研究所

Recommended Citation:
Ning Y,Zhou H,Yu H,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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