Deflectometric measurement of large mirrors
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AbstractWe discuss the inspection of large-sized, spherical mirror tiles by ‘Phase Measuring Deflectometry’ (PMD). About 10 000 of such mirror tiles, each satisfying strict requirements regarding the spatial extent of the point-spread-function (PSF), are planned to be installed on the Cherenkov Telescope Array (CTA), a future ground-based instrument to observe the sky in very high energy gamma-rays. Owing to their large radii of curvature of up to 60 m, a direct PSF measurement of these mirrors with concentric geometry requires large space. We present a PMD sensor with a footprint of only 5×2×1.2 m
2019 ◽
Vol 306-308
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pp. 69-73
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2010 ◽
Vol 710
(2)
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pp. 1530-1540
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1998 ◽
Vol 188
◽
pp. 125-128
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1992 ◽
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