Sensors for Industrial Inspection O.P Presents the mathematical background and 9783642096402 Presents the mathematical background and working methods for three dimensional reconstruction from projections To his remarks we should add only that it was about 1940 that Morgan first distinguished the group of G and K type stars with weak CN bands and metallic lines stars which have since been recognized as having the abundance of all metals relative to hydrogen much lower than in stars of the solar population Numerous areas of expertise are often required for the inspection of an individual product For this reason it is necessary for the production engineer to have at least a working knowledge of all the different technologies that may be employed