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Advanced Adaptive Optics Control: NGS & LGS Light Management from Telescope

This document outlines the intricate processes involved in controlling non-geostationary (NGS) and laser guide star (LGS) light within an adaptive optics system. It focuses on key components such as telescope pointing offload, tip/tilt mirror (TTM) adjustments, and the role of transmissive dichroics for infrared (IR) management. Essential elements like the science camera, deformable mirror (DM), and wavefront sensor (WFS) are covered in depth, detailing how optimized centroid offsets improve wavefront reconstruction and maintain precision in imaging through focus adjustments.

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Advanced Adaptive Optics Control: NGS & LGS Light Management from Telescope

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  1. NGS AO Control Light from Telescope Telescope pointing offload TTM Tip/tilt NGS IR transmissive dichroic Science Camera DM Offload focus to telescope beamSplitter Wavefront Controller WFS Flux Rot & pupil angle When TT closed NGS Reconstructor Centroid Origins

  2. LGS AO Control Light from Telescope Telescope pointing offload TTM Tip/tilt LGS NGS IR transmissive dichroic Science Camera DM Offload focus to telescope Sodium transmissive dichroic STRAP Wavefront Controller Lenslets WFS LBWFS TSS x,y,z stage Focus Laser Orientation Spot size & flux Rot & pupil angle When DM closed Optimized centroids offsets LGS Reconstructor Tip/tilt to Laser Laser TT mirror Laser pointing offload

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