PROVIDING DATA TO AN ARTICLE EQUIPPED WITH A BAR CODE

摘要

A bar code reader (10) comprises a light source that emits a light beam (L) onto a bar code (16) on an article 14, a detector that detects the light beam (RL) reflected off the bar code (16) and a modulator that modulates data onto the light beam for being conveyed to a bar code arrangement (18) associated with the bar code (16) simultaneously with the reading of the bar code. The bar code arrangement (18) comprises the article (14) with the bar code (16) and a reading detector for detecting a reading of the bar code (16) by the bar code reader (10).