Keck AO high order wavefront sensing and control: opto-mechanical design

Scott J. Lilley; Peter Wizinowich; Jonathan Steiner; Ed Wetherell; Jim Thorne; Eduardo Marin; Marc Kassis; Charlotte Guthery; Jacques Delorme; Antonin Bouchez; Mitsuko Roberts; Nemanja Jovanovic; Dominic Sanchez; Philip Hinz

doi:10.1117/12.3020355

27 August 2024 Keck AO high order wavefront sensing and control: opto-mechanical design

Scott J. Lilley, Peter Wizinowich, Jonathan Steiner, Ed Wetherell, Jim Thorne, Eduardo Marin, Marc Kassis, Charlotte Guthery, Jacques Delorme, Antonin Bouchez, Mitsuko Roberts, Nemanja Jovanovic, Dominic Sanchez, Philip Hinz

Author Affiliations +

Proceedings Volume 13097, Adaptive Optics Systems IX; 130977B (2024) https://doi.org/10.1117/12.3020355
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

As part of the High order Advanced Keck Adaptive optics (HAKA) project, a state-of-the-art ALPAO 2844 actuator deformable mirror (DM) will replace the more than 25 years old 349 actuator DM on the Keck ⅠⅠ Adaptive Optics (AO) bench. The increase in the number of DM actuators requires a new set of pupil-relay optics (PRO) to map the 2.5mm DM actuator spacing to the 200μm lenslet spacing on the Shack-Hartmann wavefront sensor (WFS). A new lenslet array with increased focal lengths will be procured in order to maintain current plate scales. HAKA will initially support science with the near-infrared camera (NIRC2), a single mode fiber fed spectrograph (KPIC + NIRSPEC) and a fast visible imager (ORKID). In addition, a new infrared wavefront sensor (‘IWA) is being designed to support science with ORKID and a suite of new science instruments: a mid-infrared coronagraphic integral field spectrograph (SCALES) and a fiber-fed high-resolution spectrograph (HISPEC). We present the opto-mechanical design of the HAKA DM, Shack-Hartmann WFS upgrades and the ‘IWA system. A mount for the HAKA DM will allow for quick integration and alignment to the Keck ⅠⅠ AO bench. The upgrade to the WFS PRO includes a new set of optics and associated mounting that fits within the mechanical constraints of the existing WFS and meets the requirements of the HAKA DM.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Scott J. Lilley, Peter Wizinowich, Jonathan Steiner, Ed Wetherell, Jim Thorne, Eduardo Marin, Marc Kassis, Charlotte Guthery, Jacques Delorme, Antonin Bouchez, Mitsuko Roberts, Nemanja Jovanovic, Dominic Sanchez, and Philip Hinz "Keck AO high order wavefront sensing and control: opto-mechanical design", Proc. SPIE 13097, Adaptive Optics Systems IX, 130977B (27 August 2024); https://doi.org/10.1117/12.3020355

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