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Jonker, W.A. (author), Kuiper, S. (author), Kamphues, F.G. (author), Vogel, P.A. (author), Tuan Vu, A. (author), Meiners, C. (author), Horst, R. (author), Navarro, R. (author), Arnold, T. (author)Conventionally, facesheets for deformable mirrors (DM) are manufactured through grinding, polishing and finishing of a piece of optical glass. Due to the amount of material that needs to be removed, the required surface form errors and the complex handling of the fragile product throughout all manufacturing steps, this is a lengthy, risky and...conference paper 2022
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Jonker, W.A. (author), Kuiper, S. (author), Kamphues, F.G. (author), Bos, A. (author), Dekker, A. (author), Chun, M. (author), Benschop, A. (author), Priem, H. (author), Monna, B. (author), Nair, M. (author), Gupta, T. (author), Ackaert, G. (author), Bola, S. (author), Varvaringos, I. (author), Schroth, J. (author)A consortium of industrial and academic partners, coordinated by TNO, is working on the realization of a 620mm adaptive secondary mirror (ASM) for the University of Hawaii’s 2.2-meter telescope. The ASM consists of a 620mm-diameter slumped convex aspherical mirror shell, manipulated by 210 variable-reluctance actuators mounted on a light...conference paper 2022
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Nijenhuis, J.R. (author), Jonker, W.A. (author), Kamphues, F.G. (author)TNO, in close cooperation with Demcon, has designed the Laser Projection Subsystem (LPS) for ESO’s Extremely Large Telescope (ELT). The ELT LPS will consist of up to 8 laser projection subunits. The design is based on the Four Laser Guide Star Facility (4LGSF), built for the ESO Very Large Telescope (VLT) (5). The VLT AO system has been...conference paper 2022
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Kuiper, S. (author), Bos, A. (author), de Vreugd, J. (author), Witvoet, G. (author), Dekker, A. (author), Kamphues, F.G. (author), Slegtenhorst, G.F. (author), Jonker, W.A. (author), Maniscalco, M.P. (author), Femenía-Castella, B. (author), Núñez Cagigal, M. (author), Bienes Pérez, J. (author), Cózar-Castellano, J. (author), González-Cava, J.M. (author), Mato, A. (author), Soler Trujillo, A.M. (author), Vega Reyes, N. (author)This paper describes the preliminary design of the Adaptive Secondary Mirror (ASM) for the European Solar Telescope (EST), as designed by TNO. This ASM will contain 1950 actuators over an optical aperture of Ø80cm. The mirror-shell of this ASM is concave with a radius of 2.156m and has a thickness of 2.5mm. To cope with the high optical heat...conference paper 2022
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Chun, M.R. (author), Ryan, A. (author), Zhang, R. (author), Kuiper, S. (author), Ackaert, G. (author), Baranec, C. (author), Baeten, M.J.J. (author), Bos, A. (author), Bowens-Rubin, R. (author), Dekker, A. (author), Dungee, R. (author), Gupta, T. (author), Hinz, P. (author), Jonker, W.A. (author), Kamphues, F.G. (author), Lai, O. (author), Lu, J. (author), Maniscalco, M.P. (author), Monna, B. (author), Nair, M. (author), Nijenhuis, J.R. (author), Priem, H. (author), Vogel, P.A. (author)We report on progress at the University of Hawaii on the integration and testing setups for the adaptive secondary mirror (ASM) for the University of Hawaii 2.2-meter telescope on Maunakea, Hawaii. We report on the development of the handling fixtures and alignment tools we will use along with progress on the optical metrology tools we will use...conference paper 2022
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Pohl, R. (author), Blok, C. (author), Simmelink, K. (author), Biesheuvel, R. (author), Resink, S. (author), Nijenhuis, J.R. (author), van Riel, M.C.J.M. (author), Kamphues, F.G. (author), Calia, D.B. (author), Hackenberg, W. (author)We report on the development of a Beam Conditioning and Diagnostics System (BCDS) that will be employed in the Laser Projection System (LPS) of the Extremely Large Telescope (ELT) of ESO. This conference article provides an overview about the detailed design of the BCDS and it summarizes the work of the development phase of this project. To this...conference paper 2022
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Nijenhuis, J.R. (author), Heijmans, J.A.C. (author), de Breeje, R. (author), Hazelebach, R.L.M. (author), de Vreugd, J. (author), Crowcombe, W.E. (author), Naron, D.J. (author), Fritz, E.C. (author), Borghi, G. (author), Navarro, R. (author), Sillari, L. (author), Sambenedetto, E. (author), Eder, J. (author), Kamphues, F.G. (author)Described is the M1 segment support, as designed by TNO in the period 2015- 2016. The design has significantly changed and improved compared to the earlier designs. During the period 2009-2010 prototypes for the primary mirror support of the E-ELT have been developed. These have been extensively tested by ESO. Design improvement were found to be...conference paper 2016
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Gielesen, W.L.M. (author), de Bruijn, D. (author), van den Dool, T.C. (author), Kamphues, F.G. (author), Mekking, J. (author), Calvel, B. (author), Laborie, A. (author), Coatantiec, C. (author), Touzeau, S. (author), Erdmann, M. (author), Gare, P. (author), Monteiro, D. (author)The Gaia mission will create an extraordinarily precise three-dimensional map of more than one billion stars in our Galaxy. The Gaia spacecraft2, built by EADS Astrium, is part of ESA's Cosmic Vision programme and scheduled for launch in 2013. Gaia measures the position, distance and motion of stars with an accuracy of 24 micro-arcsec using two...conference paper 2013
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Henselmans, R. (author), Nijkerk, M.D. (author), Lemmen, M.H.J. (author), Rijnveld, N. (author), Kamphues, F.G. (author)TNO has developed the Optical Tube Assemblies (OTAs) for the ESO VLT Four Laser Guide Star Facility. The OTAs are Galilean 20x beam expanders, expanding a ∅15 mm input beam (25W, 589 nm CW) to a steerable ∅300 mm output beam. TNO has recently successfully completed acceptance testing of the four units, showing compliance to the challenging...conference paper 2012
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Gielesen, W.L.M. (author), de Bruijn, D. (author), van den Dool, T.C. (author), Kamphues, F.G. (author), Meijer, E.A. (author), Calvel, B. (author), Laborie, A. (author), Monteiro, D. (author), Coatantiec, C. (author), Touzeau, S. (author), Erdmann, M. (author), Gare, P. (author)The Gaia mission1 will create an extraordinarily precise three-dimensional map of more than one billion stars in our Galaxy. The Gaia spacecraft2, built by EADS Astrium, is part of ESA's Cosmic Vision programme and scheduled for launch in 2013. Gaia measures the position, distance and motion of stars with an accuracy of 24 micro-arcsec using two...conference paper 2012
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- Henselmans, R. (author), Nijkerk, M.D. (author), Lemmen, M.H.J. (author), Rijnveld, N. (author), Kamphues, F.G. (author) article 2011
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Henselmans, R. (author), Nijkerk, M.D. (author), Lemmen, M.H.J. (author), Rijnveld, N. (author), Kamphues, F.G. (author)TNO is developing the Optical Tube Asssemblies (OTAs) for the ESO VLT Four Laser Guide Star Facility. The OTAs are Galilean 20x beam expanders, expanding a Ø15 mm input beam to a steerable Ø300 mm output beam with a wavefront quality requirement of 50 nm rms. The allowed defocus under the influence of the changing environmental air temperature ...conference paper 2011
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Kamphues, F.G. (author), Henselmans, R. (author), Rijnveld, N. (author), Lemmen, M.H.J. (author), Doelman, N.J. (author), Nijkerk, M.D. (author)ESO has developed a concept for a compact laser guide star unit for use in future Adaptive Optics (AO) systems. A small powerful laser is combined with a telescope that launches the beam, creating a single modular unit that can be mounted directly on a large telescope. This approach solves several of the stability problems experienced with a...conference paper 2011
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Gubbels, G.P.H. (author), van Drunen, C. (author), Böhm, G. (author), Arnold, T. (author), Kamphues, F.G. (author), Gielesen, W.L.M. (author)TNO Science and Industry has designed and is currently developing the Basic Angle Monitoring Opto-Mechanical Assembly (BAM OMA) [1], which is part of the GAIA spacecraft. In GAIA two telescopes mounted on a slowly spinning satellite will measure the position of the stars with an accuracy much higher as ever done before. Crucial in the system is...conference paper 2010
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Braam, B.C. (author), Meijer, E.A. (author), Nijenhuis, J.N. (author), Vink, R.J.P. (author), Kamphues, F.G. (author), TNO Industrie en Techniek (author)TNO is developing the Basic Angle Monitoring Opto-Mechanical Assembly for the GAIA mission of ESA, a space telescope that will create a map of the universe including distant stars and planets. GAIA is being built by EADS Astrium and scheduled for launch in 2011. Due to its stability and hardness properties, Silicon Carbide has been chosen for...conference paper 2009
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TNO Industrie en Techniek (author), Meijer, E.A. (author), Nijenhuis, J.N. (author), Vink, R.J.P. (author), Kamphues, F.G. (author), Gielesen, W.L.M. (author), Coatantiec, C. (author)To measure the relative motions of GAIA's telescopes, the angle between the telescopes is monitored by an all Silicon Carbide Basic Angle Monitoring subsystem (BAM OMA). TNO is developing this metrology system. The stability requirements for this metrology system go into the pico meter and pico radian range. Such accuracies require extreme...conference paper 2009
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TNO Industrie en Techniek (author), Kamphues, F.G. (author), Nijenhuis, J.R. (author), den Breeje, R. (author), van den Dool, T.C. (author), Ponsioen, J. (author)The European Southern Observatory (ESO) has started technology development for their next generation optical telescope. Due to its ultra large collecting area, The European Extremely Large Telescope (E-ELT) will require a paradigm shift in telescope design to keep the overall program cost at an acceptable level. The E-ELT will feature a 42 meter...conference paper 2008
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TNO Industrie en Techniek (author), Nijenhuis, J. (author), Visser, H. (author), de Man, H. (author), Dekker, B. (author), Mekking, J. (author), Kamphues, F.G. (author)ESO is building the Phase Referenced Imaging and Microarcsecond Astronomy (PRIMA) facility for the Very Large Telescope Interferometer (VLTI) in Chile. PRIMA will enable interferometric imaging of very faint objects and high precision astrometry with both Unit (UT) and Auxiliary (AT) telescopes. The PRIMA facility consists of four major sub...conference paper 2008
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TNO Industrie en Techniek (author), van den Dool, T.C. (author), Kamphues, F.G. (author), Gielesen, W.L.M. (author), Braam, B.C. (author), Loix, N. (author), Kooijman, P.P. (author), Velsink, G. (author), Stockman, Y. (author), Benoit, J. (author), Sève, F. (author)TNO has developed a compact BreadBoard (BB) cryogenic Optical Delay Line (ODL) for use in future space interferometry missions such as ESA's Darwin and NASA's TPF-I. The breadboard delay line is representative of a flight mechanism. The optical design is a two-mirror cat's-eye. A linear guiding system based on magnetic bearings provides...conference paper 2007
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van den Dool, T.C. (author), Kamphues, F.G. (author), Gielesen, W.L.M. (author), Benoit, J. (author), Laurenceau, E. (author), Poupinet, A. (author), Sève, F. (author), Stockman, Y. (author), Fleury, K. (author), Loix, N. (author), Kooijman, P.P. (author), de Vries, C. (author), van Weers, H. (author), Velsink, G. (author)TNO, in co-operation with Micromega-Dynamics, SRON, Dutch Space and CSL, has designed a compact breadboard cryogenic delay line (figure 1) for use in future space interferometry missions. The breadboard (BB) delay line is representative of a flight mechanism. The delay line has a single stage voice coil actuator for Optical Path Difference (OPD)...conference paper 2006
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