2026/02/28 by Thomas Berkefeld, Alexander Bell, Reiner Volkmer +31 · 1 citation
Physics and Astronomy · Engineering · #Adaptive optics and wavefront sensing #Optical Systems and Laser Technology #Image Processing Techniques and Applications
paper · pdf · doi:10.1007/s11207-026-02649-7
Abstract This paper describes the wave-front correction and image stabilisation system (CWS) developed for the Sunrise iii balloon-borne telescope, and provides information about its performance as measured during the integration into the telescope and during the 2024 science flight. The fast image stabilisation is done by a correlation tracker (CT) and a fast tip-tilt mirror, low order aberrations such as defocus and coma are measured by a six-element Shack-Hartmann wavefront sensor (WFS) and corrected by an active telescope secondary mirror for automated focus and manual coma correction. The CWS is specified to deliver a stabilised image with a precision of 0.005 arcsec (rms). The autofocus adjustment is specified to maintain a focus stability of 0.01 waves in the focal plane of the CWS.