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Jonker, W.A. (author), Kuiper, S. (author), Nijenhuis, J.R. (author), Dekker, A. (author), Bos, A. (author), van de Ven, E.A. (author), Chun, M. (author), Priem, H. (author), Breukers, M. (author)An adaptive secondary mirror (ASM) is currently being developed for the UH2.2 telescope, consisting of a slumped 620mm convex aspherical facesheet, manipulated by 210 variable-reluctance actuators and supported on a siliconaluminium alloy support structure. The total power dissipation of the actuators is expected to be under 3 Watts. The ASM...conference paper 2020
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Kuiper, S. (author), Doelman, N.J. (author), Human, J.D. (author), Saathof, R. (author), Klop, W.A. (author), Maniscalco, M.P. (author)TNO is developing Deformable Mirror (DM) technology, targeted for aberration correction in high-end Adaptive Optics (AO) applications in the field of lithography, astronomy, space and laser communication. The heart of this deformable mirror technology is a unique actuator technology based on the variable reluctance principle. The main advantages...conference paper 2018
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Gür, B. (author), Otter, G.J.C. (author), Jansen, R. (author), Groote Schaarsberg, J.J.M. (author), Brinkers, S. (author)Optical components with scattering properties, so-called diffusers, are core elements of calibration units in earth observation instruments. Their performance influences significantly the achievable accuracy of scientific observations. It is of high importance however to characterize the scattering properties of such a diffuser with minimum...conference paper 2015
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- Bäumer, S.M.B. (author), Duparré, A. (author), Herrmann, T. (author), Schumann, U. (author), Smorenburg, C. (author), Kirschner, V. (author), Mattsson, L. (author), Quinteros, T. (author), Berglind, R. (author), Schippel, S. (author), Technisch Physische Dienst TNO - TH (author) conference paper 1999