Near infrared throughput and stray light measurements of diffraction gratings for ELT-HARMONI
Proceedings of SPIE Society of Photo-optical Instrumentation Engineers 10706 (2018)
Sensing and control of segmented mirrors with a pyramid wavefront sensor in the presence of spiders
(2018)
Opto-mechanical designs for the HARMONI adaptive optics systems
Proceedings of SPIE SPIE 10703 (2018)
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.System analysis and expected performance of a high-contrast module for HARMONI
SPIE, the international society for optics and photonics 10702 (2018) 107029n