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Thermal stability test and analysis of a 20-actuator bimorph deformable mirror
Ning Y; Zhou H; Yu H; et al.
Source PublicationCHINESE PHYSICS B
Volume18Issue:3Pages:1089-1095
2009
Language英语
Indexed BySCI ; Ei
Subtype期刊论文
AbstractOne 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.; 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.
Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/6121
Collection自适应光学技术研究室(八室)
Corresponding AuthorNing Y
Affiliation中国科学院光电技术研究所
Recommended Citation
GB/T 7714
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.
APA Ning Y,Zhou H,Yu H,&et al..(2009).Thermal stability test and analysis of a 20-actuator bimorph deformable mirror.CHINESE PHYSICS B,18(3),1089-1095.
MLA Ning Y,et al."Thermal stability test and analysis of a 20-actuator bimorph deformable mirror".CHINESE PHYSICS B 18.3(2009):1089-1095.
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