Opto-mechanical designs for the HARMONI Adaptive Optics systems

TL;DR

This paper discusses the opto-mechanical architecture of wavefront sensor systems for HARMONI's adaptive optics, enhancing high-performance correction with innovative designs for both SCAO and LTAO systems.

Contribution

It presents the detailed opto-mechanical design and architecture of wavefront sensors for HARMONI's adaptive optics, integrating innovative solutions for high performance and high sky-coverage.

Findings

Design of wavefront sensor systems at PDR level

Integration of laser guide star and natural guide star sensors

Enhanced adaptive optics correction capabilities

Abstract

HARMONI is a visible and near-infrared integral field spectrograph equipped with two complementary adaptive optics systems, fully integrated within the instrument. A Single Conjugate AO (SCAO) system offers high performance for a limited sky coverage and a Laser Tomographic AO (LTAO) system provides AO correction with a very high sky-coverage. While the deformable mirror performing real-time correction of the atmospheric disturbances is located within the telescope itself, the instrument contains a suite of state-of-the-art and innovative wavefront sensor systems. Laser guide star sensors (LGSS) are located at the entrance of the instrument and fed by a dichroic beam splitter, while the various natural guide star sensors for LTAO and SCAO are located close to the science focal plane. We present opto-mechanical architecture and design at PDR level for these wavefront sensor systems.