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首页> 外文会议>Conference on Advancements in Adaptive Optics >OPERA, an automatic PSF reconstruction software for Shack-Hartmann AO systems: application to Altair
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OPERA, an automatic PSF reconstruction software for Shack-Hartmann AO systems: application to Altair

机译：Opera，Shack-Hartmann AO系统的自动PSF重建软件：应用于Altair

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When doing high angular resolution imaging with adaptive optics (AO), it is of crucial importance to have an accurate knowledge of the point spread function associated with each observation. Applications are numerous: image contrast enhancement by deconvolution, improved photometry and astrometry, as well as real time AO performance evaluation. In this paper, we present our work on automatic PSF reconstruction based on control loop data, acquired simultaneously with the observation. This problem has already been solved for curvature AO systems. To adapt this method to another type of WFS, a specific analytical noise propagation model must be established. For the Shack-Hartmann WFS, we are able to derive a very accurate estimate of the noise on each slope measurement, based on the covariances of the WFS CCD pixel values in the corresponding sub-aperture. These covariances can be either derived off-line from telemetry data, or calculated by the AO computer during the acquisition. We present improved methods to determine 1) r_0 from the DM drive commands, which includes an estimation of the outer scale L_0 2) the contribution of the high spatial frequency component of the turbulent phase, which is not corrected by the AO system and is scaled by r_0. This new method has been implemented in an IDL-based software called OPERA (Performance of Adaptive Optics). We have tested OPERA on Altair, the recently commissioned Gemini-North AO system, and present our preliminary results. We also summarize the AO data required to run OPERA on any other AO system.
机译：在使用自适应光学器件（AO）进行高角度分辨率成像时，对与每个观察相关联的点传播函数具有准确的知识至关重要。应用众多：通过去卷积，改进的光度测量和天数以及实时AO性能评估，图像对比度增强。在本文中，我们在基于控制回路数据的自动PSF重建中展示了我们的工作，与观察一起同时获取。曲率AO系统已经解决了这个问题。为了使该方法适应另一种类型的WFS，必须建立特定的分析噪声传播模型。对于Shack-Hartmann WFS，我们能够基于相应子光圈中的WFS CCD像素值的Coverce来得出对每个斜率测量的噪声的非常准确的估计。这些协方差可以从遥测数据脱离线，或者在采集期间由AO计算机计算。我们提出了从DM驱动命令确定1）R_0的改进方法，该方法包括外刻度L_0 2的估计）湍流阶段的高空间频率分量的贡献，该湍流阶段未被AO系统校正并缩放通过r_0。此新方法已在称为Opera的基于IDL的软件中实现（自适应光学性能）。我们在Altair测试了歌剧，最近委托的双子座 - 北AO系统，并展示了我们的初步结果。我们还总结了在任何其他AO系统上运行Opera所需的AO数据。

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