HARMONI: first light spectroscopy for the ELT: simulating the alignment of a three-mirror anastigmat
SPIE, the international society for optics and photonics (2020) 352
Final assembly, metrology, and testing of the WEAVE fibre positioner
(2020)
HARMONI - first light spectroscopy for the ELT: spectrograph camera lens mounts
(2020)
Abstract:
HARMONI is the first light visible and near-infrared (NIR) integral field spectrograph for the Extremely Large Telescope(ELT). The HARMONI spectrograph will have four near-infrared cameras and two visible, both with seven lenses of various materials and diameters ranging from 286 to 152 mm. The lens mounts design has been optimized for each lens material to compensate for thermal stresses and maintain lens alignment at the operational temperature of 130 K. We discuss their design and mounting concept, as well as assembly and verification steps. We show initial results from two prototypes and outline improvements in the mounting procedures to reach tighter lens alignments. To conclude, we present a description of our future work to measure the decentering of the lenses when cooled down and settled.HARMONI - first light spectroscopy for the ELT: final design of the integral field unit
Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 11451 (2020) 1145138-1145138-11
HARMONI - first light spectroscopy for the ELT: novel techniques for the calibration of non-common path aberrations
SPIE, the international society for optics and photonics (2020) 349