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Heritage Science

Table 4 MARS best-estimate scanning characteristics determined for these mirrors

From: Close up to the surface: reflections on a preliminary forensic study of four Chinese bronze mirrors

  1. The ASN# is just the identification number for a given scan run. FOV stand for field of view (or sample diameter), SOD is the source-to-object distance, and ODD is the object-to-detector distance. As these are 3-D tomorgraphic scans there is a volumetric pixel or “voxel” which here was set at a resolution of 0.09 mm. To reduce artifacts in the scans a 7 mm copper filter was inserted between the artifact and the X-ray beam in conjunction with long exposure times and high beam currents to maximise transmitted X-ray photons through each mirror
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