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Lecture 8 Part 1: Class Project Intro Part 2: Effect of Tip-tilt on Image Quality Part 3: AO System Optimization

(Switch to Class Project slides). . Outline. Quantitative impact of image motion on image qualityHow does image motion affect Strehl ratio?Example of system optimization: the original Keck AO systemDependence on individual error budget terms on system parametersOptimizing an AO system. Part On

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Lecture 8 Part 1: Class Project Intro Part 2: Effect of Tip-tilt on Image Quality Part 3: AO System Optimization

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    1. Lecture 8 Part 1: Class Project Intro Part 2: Effect of Tip-tilt on Image Quality Part 3: AO System Optimization Claire Max Astro 289, UC Santa Cruz October 20, 2011 Bring Keck Telescope and AO Blue Books, CELT Green BookBring Keck Telescope and AO Blue Books, CELT Green Book

    2. (Switch to Class Project slides)

    3. Outline Quantitative impact of image motion on image quality How does image motion affect Strehl ratio? Example of system optimization: the original Keck AO system Dependence on individual error budget terms on system parameters Optimizing an AO system

    4. Part One: Image motion and its effects on Strehl ratio Sources of image motion: Telescope shake due to wind buffeting (hard to model a priori) Atmospheric turbulence Image motion due to turbulence: Sensitive to inhomogenities > telescope diam. D Hence reduced if “outer scale” of turbulence is ~ D

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