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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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Laan, E. (author), Stam, D. (author), Snik, F. (author), Karalidi, T. (author), Keller, C. (author), ter Horst, R. (author), Navarro, R. (author), Oomen, G. (author), de Vries, J. (author), Hoogeveen, R. (author), TNO Industrie en Techniek (author)SPEX (Spectropolarimeter for Planetary EXploration) is an innovative, compact remotesensing instrument for measuring and characterizing aerosols in the atmosphere. The shoebox size instrument is capable of accurate full linear spectropolarimetry without moving parts or liquid crystals. High precision polarimetry is performed through encoding the...conference paper 2017
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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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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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Agócs, T. (author), Navarro, R. (author), Venema, L. (author), van Amerongen, A.H. (author), Tol, P.J.J. (author), van Brug, H. (author), Brandl, B.R. (author), Molster, F. (author), Todd, S. (author)We present innovative, immersed grating based optical designs for the SMO (Spectrograph Main Optics) module of the Mid-infrared E-ELT Imager and Spectrograph, METIS. The immersed grating allows a significant reduction of SMO volume compared to conventional echelle grating designs, because the diffraction takes place in high refractive index...conference paper 2014
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van Harten, G. (author), Snik, F. (author), Rietjens, J.H.H. (author), Smit, J.M. (author), de Boer, J. (author), Diamantopoulou, R. (author), Hasekamp, O.P. (author), Stam, D.M. (author), Keller, C.U. (author), Laan, E.C. (author), Verlaan, A.L. (author), Vliegenthart, W.A. (author), ter Horst, R. (author), Navarro, R. (author), Wielinga, K. (author), Hannemann, S. (author), Moon, S.G. (author), Voors, R. (author)We present the Spectropolarimeter for Planetary EXploration (SPEX), a high-accuracy linear spectropolarimeter measuring from 400 to 800 nm (with 2 nm intensity resolution), that is compact (~ 1 liter), robust and lightweight. This is achieved by employing the unconventional spectral polarization modulation technique, optimized for linear...conference paper 2011
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Voors, R. (author), Moon, S.G. (author), Hannemann, S. (author), Rietjens, J.H.H. (author), van Harten, G. (author), Snik, F. (author), Smit, M. (author), Stam, D.M. (author), Keller, C.U. (author), Laan, E.C. (author), Verlaan, A.L. (author), Vliegenthart, W.A. (author), ter Horst, R. (author), Navarro, R. (author), Wielinga, K. (author)SPEX (Spectropolarimeter for Planetary Exploration) was developed in close cooperation between scientific institutes and space technological industries in the Netherlands. It is used for measuring microphysical properties of aerosols and cloud particles in planetary atmospheres. SPEX utilizes a number of novel ideas. The key feature is that full...conference paper 2011
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Rieetjens, J.H.H. (author), Snik, F. (author), Stam, D.M. (author), Smit, J.M. (author), van Harten, G. (author), Keller, C.U. (author), Verlaan, A.L. (author), Laan, E.C. (author), ter Horst, R. (author), Navarro, R. (author), Wielinga, K. (author), Moon, S.G. (author), Voors, R. (author), TNO Industrie en Techniek (author)We present SPEX, the Spectropolarimeter for Planetary Exploration, which is a compact, robust and low-mass spectropolarimeter designed to operate from an orbiting or in situ platform. Its purpose is to simultaneously measure the radiance and the state (degree and angle) of linear polarization of sunlight that has been scattered in a planetary...conference paper 2010
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Snik, F. (author), Rietjens, J.H.H. (author), van Harten, G. (author), Stam, D.M. (author), Keller, C.U. (author), Smit, J.M. (author), Laan, E.C. (author), Verlaan, A.L. (author), ter Horst, R. (author), Navarro, R. (author), Wielinga, K. (author), Moon, S.G. (author), Voors, R. (author)SPEX (Spectropolarimeter for Planetary EXploration) is an innovative, compact instrument for spectropolarimetry, and in particular for detecting and characterizing aerosols in planetary atmospheres. With its ∼1-liter volume it is capable of full linear spectropolarimetry, without moving parts. The degree and angle of linear polarization of the...conference paper 2010
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Division of Technology for Society (author), Snik, F. (author), Karalidi, T. (author), Keller, C. (author), Laan, E. (author), ter Horst, R. (author), Navarro, R. (author), Stam, D. (author), Aas, C. (author), de Vries, J. (author), Oomen, G. (author), Hoogeveen, R. (author)SPEX (Spectropolarimeter for Planetary EXploration) is an innovative, compact remote-sensing instrument for detecting and characterizing aerosols. With its 1-liter volume it is capable of full linear spectropolarimetry, without moving parts. High precision polarimetry is performed through encoding the degree and angle of linear polarization of...conference paper 2008