High-bandwidth tip-tilt compensation for small telescope systems

Andreas Sinn; Christian Schwaer; Peter Kremsner; Georg Schitter

doi:10.1117/12.2627831

29 August 2022 High-bandwidth tip-tilt compensation for small telescope systems

Andreas Sinn, Christian Schwaer, Peter Kremsner, Georg Schitter

Proceedings Volume 12185, Adaptive Optics Systems VIII; 1218584 (2022) https://doi.org/10.1117/12.2627831
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

This publication presents a high-bandwidth tip-tilt compensation system for small telescopes. It is designed with respect to the requirements of applications such as free-space optical (FSO) communication and space debris imaging, where high tracking speeds up to several degrees per second are required and lead to an increased disturbance bandwidth. A quad-photo-diode (QPD) is used to measure the tip-tilt errors and compensate them in a closed-loop manner by a fast-steering mirror (FSM). Feedback controllers are designed based on a measured disturbance spectrum. Measurement results obtained from reflected sunlight of a low-Earth-orbit (LEO) object successfully demonstrate the potential of the proposed compensation system, effectively reducing the RMS tip-tilt error by up to a factor of 5.

Citation Download Citation

Andreas Sinn, Christian Schwaer, Peter Kremsner, and Georg Schitter "High-bandwidth tip-tilt compensation for small telescope systems", Proc. SPIE 12185, Adaptive Optics Systems VIII, 1218584 (29 August 2022); https://doi.org/10.1117/12.2627831

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