Detailed design and first test results of the ELT prefocal station hosted metrology

S. Schmid; E. Aller Carpentier; C. Dupuy; P. Ferreira; S. Guisard; P. Jolley; A. Jost; S. Leveque; S. A. E. Lewis; J. Marrero; H. Sommer

doi:10.1117/12.3019848

11 September 2024 Detailed design and first test results of the ELT prefocal station hosted metrology

S. Schmid, E. Aller Carpentier, C. Dupuy, P. Ferreira, S. Guisard, P. Jolley, A. Jost, S. Leveque, S. A. E. Lewis, J. Marrero, H. Sommer

Author Affiliations +

Proceedings Volume 13094, Ground-based and Airborne Telescopes X; 130944M (2024) https://doi.org/10.1117/12.3019848
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The ELT prefocal stations provide wavefront sensing to support the active control of the telescope during observations; they also include mirrors to distribute the telescope optical beam to the scientific instrument or diagnostic tool that finally uses the light collected by the ELT. Built in to the prefocal stations is a hosted metrology positioning system where metrology measuring instruments including a laser tracker and alignment telescope will be installed. This metrology will be used during coarse alignment of the ELT, to maintain the internal alignment of the prefocal stations, and to locate them with respect to their surroundings. The detailed design and application of these instruments is described here, together with a first set of test results.

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

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S. Schmid, E. Aller Carpentier, C. Dupuy, P. Ferreira, S. Guisard, P. Jolley, A. Jost, S. Leveque, S. A. E. Lewis, J. Marrero, and H. Sommer "Detailed design and first test results of the ELT prefocal station hosted metrology", Proc. SPIE 13094, Ground-based and Airborne Telescopes X, 130944M (11 September 2024); https://doi.org/10.1117/12.3019848

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