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Bergmans, R.H. (author), Nieuwenkamp, H.J. (author), Kok, G.J.P. (author), Blobel, G. (author), Nouira, H. (author), Küng, A. (author), Baas, M. (author), te Voert, M.J.A. (author), Baer, G. (author), Stuerwald, S. (author)A comparison of topography measurements of aspherical surfaces was carried out by European metrology institutes, other research institutes and a company as part of an European metrology research project. In this paper the results of this comparison are presented. Two artefacts were circulated, a small polymer coated aspherical lens with a clear...article 2015
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Bos, A. (author), Henselmans, R. (author), Rosielle, P.C.J.N. (author), Steinbuch, M. (author), te Voert, M.J.A. (author)The baseline design of the European Extremely Large Telescope features a telescope with a 39-meter-class primary mirror (M1), consisting of 798 hexagonal segments. A measurement machine design is presented based on a non-contact single-point scanning technique, capable of measuring the form error of each segment with nanometer uncertainty, fast,...conference paper 2014
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Navarro, R. (author), Elswijk, E. (author), te Voert, M.J.A. (author), Venema, L. (author)NOVA-ASTRON has delivered a suite of cryogenic astronomical instruments for large ground based telescopes as well as space missions. The instruments include polarimeters, spectrometers, cameras and interferometers, mostly operating at infrared. Several methods have been developed to verify or measure, under cryogenic conditions, the performance...conference paper 2014
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Pijnenburg, J.A.C.M. (author), te Voert, M.J.A. (author), de Vreugd, J. (author), Vosteen, L.L.A. (author), van Werkhoven, W.P. (author), Mekking, J. (author), Nijland, B.A.H. (author)Through the years many stable optical mounts have been designed, analyzed and tested at TNO. This paper gives an overview of the design principles used. Various examples are presented together with verification test results. The use of adhesives in combination with an iso-static mount design allows mounting of optical components in a limited...conference paper 2012
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de Vreugd, J. (author), te Voert, M.J.A. (author), Nijenhuis, J.R. (author), Pijnenburg, J.A.C.M. (author), Tabak, E. (author)Adhesives are widely used in optomechanical structures for bonding optical components to their mounts. The main advantage of using adhesives is the excellent strength to weight ratio. Adhesive bonding is seen as a desirable joining technique as it allows for greater flexibility in design. A disadvantage of adhesives however is the limited...conference paper 2012
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Pijnenburg, J.A.C.M. (author), te Voert, M.J.A. (author), de Vreugd, J. (author), Vosteen, L.L.A. (author), van Werkhoven, W.P. (author), Mekking, J. (author), Nijland, B.A.H. (author)Through the years many stable optical mounts have been designed, analyzed and tested at TNO. This paper gives an overview of the design principles used. Various examples are presented together with verification test results. The use of adhesives in combination with an iso-static mount design allows mounting of optical components in a limited...public lecture 2012