The Shack-Hartmann wavefront sensor for the Rubin Observatory

Jerome Ballesta; Guillaume Tison; Rafael Meyer; Jacques Sebag; Sandrine Thomas

doi:10.1117/12.2563380

13 December 2020 The Shack-Hartmann wavefront sensor for the Rubin Observatory

Jerome Ballesta, Guillaume Tison, Rafael Meyer, Jacques Sebag, Sandrine Thomas

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 114513F (2020) https://doi.org/10.1117/12.2563380
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

A measurement platform including a Shack-Hartmann Wavefront Sensor (SHWFS) has been designed, integrated and tested at Imagine Optic, Orsay France and delivered to the Rubin Observatory (previously known as the LSST). This instrument will be used for the initial on-axis optical alignment and testing of the LSST telescope. The optical configuration of the Rubin Telescope without the presence of the main LSST camera requires advanced capabilities in term of quantities of aberrations to measure, linearity, accuracy and sensitivity for usage on a natural star. The HASO 128 GE 2, available from Imagine Optic, was identified as the most relevant WFS to meet all those requirements. In that paper, we provide details about the simulations that led to the choice of the HASO 128 GE 2. We also provide the specifics regarding the opto-mechanical design allowing the relay imaging of the pupil compatible with the fast aperture of the telescope, a reference source for the on-site calibration of the system and the optical output made available for a viewer camera.

Citation Download Citation

Jerome Ballesta, Guillaume Tison, Rafael Meyer, Jacques Sebag, and Sandrine Thomas "The Shack-Hartmann wavefront sensor for the Rubin Observatory", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 114513F (13 December 2020); https://doi.org/10.1117/12.2563380

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