AO4ELT5 Proceedings

Current Status and Implementation of Pyramid Truth Wavefront Sensor on NFIRAOS Simulation Bench at NRC-Herzberg

Mieda, Etsuko (NRC-Herzberg), Veran, Jean-Pierre (NRC-Herzberg), Lardiere, Olivier (NRC-Herzberg), Liu, Siqi (University of Toronto), Lamb, Masen (University of Victoria), Turri, Paolo (University of Victoria), Andersen, David (NRC-Herzberg), Herriot, Glen (NRC-Herzberg)

We describe the components and functions and report the recent upgrades/modifications of the HeNOS (Herzberg NFIRAOS Optical Simulator) bench, a NFIRAOS (Narrow Field InfraRed Adaptive Optics System) simulator bench at NRC-Herzberg. The recent upgrade includes the new natural guide star simulator, the new science camera, and the implementation of a truth wavefront sensor using a pyramid. The truth wavefront sensing simulation involves the reproduction of Shack-Hartmann wavefront sensor elongation due to the sodium layer profile, which we simulate with a set of defocus on the ground layer deformable mirror. This is the first truth wavefront sensor made with a pyramid in use today.

DOI: 10.26698/AO4ELT5.0050- Proceeding PDF

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