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Träfflista för sökning "hsv:(NATURVETENSKAP) ;lar1:(fhs);pers:(Andersson Kent)"

Search: hsv:(NATURVETENSKAP) > Swedish National Defence College > Andersson Kent

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1.
  • Andersson, Kent, et al. (author)
  • A review of materials for spectral design coatings in signature management applications
  • 2014
  • In: Optics and Photonics for Counterterrorism, Crime Fighting, and Defence X; and Optical Materials and Biomaterials in Security and Defence Systems Technology XI (vol. 9253). - : SPIE - International Society for Optical Engineering. - 9781628413168
  • Conference paper (peer-reviewed)abstract
    • The current focus in Swedish policy towards national security and high-end technical systems, together with a rapid development in multispectral sensor technology, adds to the utility of developing advanced materials for spectral design in signature management applications. A literature study was performed probing research databases for advancements. Qualitative text analysis was performed using a six-indicator instrument: spectrally selective reflectance; low gloss; low degree of polarization; low infrared emissivity; non-destructive properties in radar and in general controllability of optical properties. Trends are identified and the most interesting materials and coating designs are presented with relevant performance metrics. They are sorted into categories in the order of increasing complexity: pigments and paints, one-dimensional structures, multidimensional structures (including photonic crystals), and lastly biomimic and metamaterials. The military utility of the coatings is assessed qualitatively. The need for developing a framework for assessing the military utility of incrementally increasing the performance of spectrally selective coatings is identified.
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2.
  • Andersson, Kent (author)
  • Preparation and Characterisation of Sputtered Titanium- and Zirconium Nitride Optical Films
  • 1993
  • Licentiate thesis (other academic/artistic)abstract
    • Multilayered interference coatings based on titanium- and zirconium nitride and designed for solar control have been prepared using reactive d c magnetron sputtering. Preparation effects and degradation mechanisms were investigated. It was shown that the quality of the nitride strongly depends on the degree of crystallinity in the underlying oxide. It has been shown that the nitride layer partly oxidizes as the top oxide layer is deposited. The degradation is enhanced with temperature. A thin sacrificial layer of aluminium deposited between successive depositions of nitride and oxide is shown to improve the optical performance of the coating as preparedm as well as after accelerated ageing tests.The optical properties of opaque and semitransparent films of zirconium nitride have been studied. A thorough investigation of the influence of composition, deposition rate, substrate temperature and film thickness on the optical response of the film was performed. Both photometric and ellipsometric methods were used to determine thicknesses and the optical constants at wavelengths ranging from 0.23 to 25 μm. The resulting values of n and k, in the wavelength intervals where these independent methods are applicable, have been shown to agree extremely well. The results so far indicate an even larger potential for zirconium nitride based solar control coatings as compared to the titanium nitride based.Access to optical constants derived from films of zirconium nitride of variable quality made multilayer modelling a powerful tool in the design and analysis of solar control coatings.
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  • Result 1-2 of 2
Type of publication
conference paper (1)
licentiate thesis (1)
Type of content
other academic/artistic (1)
peer-reviewed (1)
Author/Editor
Andersson, Kent (2)Undo refine
Åkerlind, Christina (1)
Roos, Arne (1)
Georgson, M. (1)
University
Swedish National Defence College  (2)Undo refine
Linköping University (1)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)

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