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对于双压电片来说,在其应用上存在大量的问题。特别是变形反射镜设计来说,通常作为波前矫正器,这主要是因为它的结构相对比较简单、而且变形量也较大,耗费成本偏低等,这样一来,可以代替传统变形镜,从而大大降低自适应光学系统成本。为进一步验证双压电片可行性以及反射镜性能,本文是利用20单元试验样镜。而此样镜结构为双层压电陶瓷,而其中一层作为整体离焦电极,主要用于校正大幅值离焦像差。通过试验表明,样镜离焦像差可以获得高达8um以上校正量,此外,也可以适应其它高阶像差,然而,校正能力会因空间频率的持续升高而不断的降低,进而显现出适用于校正低阶像差特性。同时,又对有效孔径下的拟合能力进行详细的探讨和分析。
For bimorphs, there are a number of problems in their application. In particular, the design of the modified mirror, usually as a wavefront appliance, mainly because of its relatively simple structure, but also larger deformation, lower cost and so on, so that you can replace the traditional deformable mirror, Thus greatly reducing the cost of adaptive optics. To further verify the feasibility of dual piezoelectric films and mirror performance, this article is the use of 20 unit test sample mirror. The mirror structure is a double-layer piezoelectric ceramic, and one of the layers is used as a whole defocusing electrode, which is mainly used for correcting large-amplitude defocus aberration. Experiments show that the sample mirror defocus aberration can be up to 8um above the amount of correction, in addition, can also adapt to other higher-order aberrations, however, the correction ability will continue to decline due to the continued increase in spatial frequency, and thus appears applicable To correct low-order aberration characteristics. At the same time, the fitting ability under effective aperture is discussed and analyzed in detail.