Method and equipment for determining colour of an object, in particular a tooth, from light scattered inside tooth not directly reflected from tooth surface

摘要

Light (10) is directed along an optical fibre (1) to the tooth (12). Light, scattered inside the tooth and not directly reflected from the tooth surface, is transmitted from a separate point on the tooth along a second fibre (2) to a grid or prism (26). This resolves the light into its individual components which are then evaluated to determine the colour of the tooth