You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
29 July 2016Dimensional stability testing in thermal vacuum of the CHEOPS optical telescope assembly
The CHEOPS mission (CHaracterising ExOPlanet Satellite) is dedicated to searching for exoplanetary transits by
performing ultra-high precision photometry on bright stars already known to host planets. A 32cm diameter on-axis
Ritchey-Chrétien telescope is used for imaging onto a single cooled detector. With integration times up to 48 hours the
thermal stability of the telescope and its structure are key to the performance. Using a multi-lateration interferometer
setup TNO has successfully demonstrated the μm-level stability of the Structural Thermal Model (STM2) of the Optical
Telescope Assembly (OTA) in thermal vacuum. This OTA was later upgraded to become the Flight Model. Experiments
comprise thermal vacuum cycling, thermal vacuum stability testing where axial and lateral deformations are measured to
the nm-level sensitivity.
W. A. Klop andA. L. Verlaan
"Dimensional stability testing in thermal vacuum of the CHEOPS optical telescope assembly", Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 990437 (29 July 2016); https://doi.org/10.1117/12.2232899
The alert did not successfully save. Please try again later.
W. A. Klop, A. L. Verlaan, "Dimensional stability testing in thermal vacuum of the CHEOPS optical telescope assembly," Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 990437 (29 July 2016); https://doi.org/10.1117/12.2232899