Münster 2017 – wissenschaftliches Programm
T 35.2: Vortrag
Dienstag, 28. März 2017, 11:15–11:30, H 2
Measurement of aspherical mirrors with PMD — •Andreas Specovius, Christopher Van Eldik, André Wörnlein, and Alexander Ziegler — Friedrich–Alexander–Universität Erlangen–Nürnberg
The future Cherenkov Telescope Array (CTA) will consist of about 100 single telescopes with a total reflecting surface of ∼10.000 m2 made of numerous mirror facets. An efficient way to reliably reconstruct the surface of specular free–forms is Phase Measuring Deflectometry (PMD). PMD is routinely used to characterize the focal distance and point spread function of spherical CTA prototype mirrors. To investigate the possibility to measure the surface properties of aspherical mirrors, the standard PMD evaluation used for spherical telescope mirrors has been applied to one type of the aspherical mirror facets of the medium–sized prototype Schwarzschild–Couder Telescope (SCT). Experiences, implemented improvements and first results of this analysis are shown.