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首页> 外文期刊>Journal of the Optical Society of America, A. Optics, image science, and vision >On representing and correcting wavefront errors in high-contrast imaging systems
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On representing and correcting wavefront errors in high-contrast imaging systems

机译：关于高对比度成像系统中波前误差的表示和校正

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Conventional adaptive-optics systems correct the wavefront by adjusting a deformable mirror (DM) based on measurements of the phase aberration taken in a pupil plane. The ability of this technique, known as phase conjugation, to correct aberrations is normally limited by the maximum spatial frequency of the DM. In this paper we show that conventional phase conjugation is not able to achieve the dark nulls needed for high-contrast imaging. Linear combinations of high frequencies in the aberration at the pupil plane "fold" and appear as low-frequency aberrations at the image plane. After describing the frequency-folding phenomenon, we present an alternative optimized solution for the shape of the deformable mirror based on the Fourier decomposition of the effective phase and amplitude aberrations.
机译：常规的自适应光学系统通过基于在光瞳平面中获得的相差的测量值来调节可变形反射镜（DM）来校正波前。这种技术（称为相位共轭）校正像差的能力通常受DM的最大空间频率限制。在本文中，我们证明了常规的相位共轭无法实现高对比度成像所需的暗零点。瞳孔平面处像差的高频线性组合“折叠”并在像平面处表现为低频像差。在描述了频率折叠现象之后，我们基于有效相位和振幅像差的傅立叶分解，提出了可变形镜形状的替代优化解决方案。

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