Patent ID: 6049389
Filing Date: 2000-04-11
Classification: B07C,G06K

Abstract:
A method of optically reading relief carried by the outside wall of a transparent or translucent receptacle, the method including the steps of:illuminating the outside wall of the receptacle around its periphery with an incident light beam;using a pick-up element to pick up the light beams reflected by the receptacle in order to transmit them to a receiver system;processing the light beams received by the receiver system in order to identify relief;wherein the step of illuminating the outside wall of the receptacle is carried out by means of an incident light cone supplied by a lighting system placed beneath the receptacle;adjusting the width of the incident light cone to limit lighting at least to the portion of the outside wall that is provided with relief in order to avoid parasitic reflections;picking up the reflected light beams by means of the pick-up element disposed beneath the receptacle and suitable for forming a plane image of the wall of the bottle; andadjusting the field angle of the pick-up element as a function of the characteristics of the receptacle.