Patent Document ID: 20030156294
Application ID: 10258233
Patent Status: 0

Claim One:
1. A method for identifying an object wherein at least one identification area is illuminated with coherent light and at least one portion of the light reflected by said identification area is intercepted, so as to obtain an interference pattern under determined illumination and interception conditions, and then said interference pattern is used for identifying said object, characterized by the following steps: (a) selecting an intrinsic area of an object to be recognized, which has not undergone any specific treatment for standardizing the interference pattern which it is susceptible to produce; (b) illuminating at least one identification area in said intrinsic surface of said object to be recognized with a coherent light and intercepting at least one portion of the light reflected by said identification area, in order to obtain an interference pattern under determined illumination and interception conditions; (c) retaining this interference pattern as a reference interference pattern of the object to be recognized; (d) placing a candidate object likely to be the object to be recognized under the same illumination and interception conditions as those used for obtaining said reference interference pattern and obtaining an interference pattern from this candidate object; (e) comparing said reference interference pattern with said interference pattern of the candidate object; and (f) evaluating the probability of identity between the object to be recognized and the candidate object depending on the matching level between said reference interference pattern and said interference pattern of the candidate object.