Segmented active/adaptive thin shell mirrors

B. Speet; F. Kamphues; J. de Vreugd; J. Mourik; P. Hinz; I. Politopoulos; R. Navarro

doi:10.1117/12.3035716

26 August 2024 Segmented active/adaptive thin shell mirrors

B. Speet, F. Kamphues, J. de Vreugd, J. Mourik, P. Hinz, I. Politopoulos, R. Navarro

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 1310043 (2024) https://doi.org/10.1117/12.3035716
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Current ELTs use comparatively thick segmented mirrors with a support structure / warping structure of significant mass. In this publication we present a method to develop Segmented Thin Shell Mirrors that are intended to be supported by multiple actuators mounted on a backing structure. This enables active and or adaptive segmented mirrors for a variety of applications. Starting with a circular Adaptive Secondary Mirror face sheet, the pre and post waterjet cutting surface form error was measured and compared. The difference between the two is 17.7 μm peak-to-valley and 3.7 μm rms. The error is gradual and can easily be compensated by pre-loading the actuators that support and actively deform the mirror.

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

Citation Download Citation

B. Speet, F. Kamphues, J. de Vreugd, J. Mourik, P. Hinz, I. Politopoulos, and R. Navarro "Segmented active/adaptive thin shell mirrors", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 1310043 (26 August 2024); https://doi.org/10.1117/12.3035716

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