Hamburg 2016 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 65: Gammaastronomie III
T 65.9: Vortrag
Dienstag, 1. März 2016, 18:50–19:05, VMP11 HS
Phase measuring deflectometry: An improved setup for measuring CTA mirror facets — •Andreas Specovius, Christopher van Eldik, Andre Wörnlein, and Alexander Ziegler — Erlangen Centre for Astroparticle Physics (ECAP)
The future Cherenkov Telescope Array (CTA) will consist of up to 100 single telescopes with a total reflecting surface of ∼10.000 m2 made of numerous mirror facets. Characterizing the surface properties of these facets is quite challenging concerning time and logistics. 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 address the possibility to measure the surface properties of aspherical mirrors, a new PMD setup has recently been built. First experience with this setup is reported.