2015/04/30 by Rodolfo Canestrari, R. Canestrari, Enrico Giro +10 · 6 citations
Engineering · Physics and Astronomy · #Active optics #Aerospace engineering #Angular resolution (graph drawing) #Astronomical Observations and Instrumentation #Astrophysics and Cosmic Phenomena #Cherenkov radiation #Curvature #Curved mirror #Dome (geology) #Engineering #Gamma-ray bursts and supernovae #Geology #Metrology #Optical telescope #Optics #Physics #Radius of curvature #Telescope #astro-ph.IM
paper · pdf · doi:10.1016/j.nima.2015.09.092
published in Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 806, 61-69 (Elsevier BV) · 24 pages, 12 figures, 1 table, accepted for publication on September 26th 2015 in Nuclear Instruments and Methods in Physics Research Section A (NIM-A)
openalex publication_date 2015/10/14 · arxiv created 2016/01/08 · arxiv updated 2016/01/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Cherenkov Telescopes are equipped with optical dishes of large diameter -- in general based on segmented mirrors -- with typical angular resolution of a few arc-minutes. To evaluate the mirror's quality specific metrological systems are required that possibly take into account the environmental conditions in which typically these telescopes operate (in open air without dome protection). For this purpose a new facility for the characterization of mirrors has been developed at the labs of the Osservatorio Astronomico di Brera of the Italian National Institute of Astrophysics. The facility allows the precise measurement of the radius of curvature and the distribution of the concentred light in terms of focused and scattered components and it works in open air. In this paper we describe the facility and report some examples of its measuring capabilities.