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Curvature Wavefront Sensor For Solar Adaptive Optics

机译：用于太阳能自适应光学的曲率波前传感器

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摘要

Active or adaptive optics often require the ability to characterize wavefront aberrations using natural extended sources. The task becomes especially challenging when dealing with widely extended sources such as the solar granulation. We propose a new approach based on the processing of oppositely defocused images. This method, which is a generalization of a technique known as curvature sensing, derives the wavefront curvature from the difference between two oppositely defocused images and determines the second momenta of the point spread function. The proposed method measures the wavefront aberration from the images themselves, requires little computational resources, is fast enough to be used in a real-time adaptive optics system and is particularly adapted to random patterns such as solar granulation or spot penumbras whose morphology evolves during the observation. We envision the application of the method to real-time seeing compensation in solar astronomical telescopes, and to the correction of optical system aberrations in remote sensing instrumentation. This effort is directed towards building a curvature sensor for the real-time applications.
机译：有源或自适应光学器件通常需要具有使用自然扩展光源表征波前像差的能力。当处理广泛扩展的资源（例如太阳能颗粒）时，这项任务变得特别具有挑战性。我们提出了一种基于对散焦图像处理的新方法。该方法是对称为曲率感测技术的概括，它从两个相对散焦的图像之间的差中得出波前曲率，并确定点扩展函数的第二矩。所提出的方法从图像本身测量波前像差，需要很少的计算资源，足够快地用于实时自适应光学系统中，并且特别适合于随机图案，例如太阳造粒或点半影，其形态会在成像过程中演变。观察。我们设想该方法在太阳天文望远镜中的实时目视补偿以及在遥感仪器中光学系统像差的校正中的应用。这项工作致力于为实时应用构建曲率传感器。

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  • 来源
    《Solar Physics》 |2002年第1期|189-207|共19页
  • 作者

    G. Molodij; F. Roddier; R. Kupke; D.L. Mickey;

  • 作者单位

    U.P.S;

    Institute for Astronomy University of Hawaii;

    Institute for Astronomy University of Hawaii;

    Institute for Astronomy University of Hawaii;

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