Adaptable and multispectral signature management materials

The modern world puts higher requirements on flexibility for defence material since international operations are conducted in varying environments. The report summarizes the activity that has been done in the project "Adaptable Camouflage Materials" within the time frame of 2004-2007. One reoccurring concept is multi spectrality i.e. one is aiming at low signature in several wavelength intervals simultaneously (for example radar, IR and optical wave lengths). One example is low emissive paint which minimizes the signature in the infrared region and simultaneously gives the right colour in the visible range (visible light). Several materials and material combinations has been studied Another technique is structure modification using photonic crystals or a so called Salisbury screen. This technique can be used in all wave length areas where a threat can exist. It is important that improvement of the signature in one wave length region does not deteriorate it in another. This is achieved by collaboration between experts of different types of threat within the same project. Ceramic materials are studied as a candidate for protection in the optical region and IR region simultaneously. Ferrites render thinner and lighter protection possible that does not influence the IR signature. Some of the materials are used in high temperatures in for example aeroplane engines and therefore their properties in the IR and radar region are studied for high temperatures. The work leads to development of more advanced materials and the coverage of research development in other parts of the world.