A Lancashire company, Panoptic, reveals how counterfeiters fool the banknote
analysers used in devices such as railway ticket machines. These machines shine
ultraviolet light onto banknotes and look for fluorescence. Genuine notes do not
fluoresce. But crooks can dazzle the optics by shining a bright light through
the note slot. To counter this, Panoptic combines a miniature ultraviolet source
and detector in a sealed tube, which presses down on the note to exclude
extraneous light (GB 2 334 574).
More from 51动漫
Explore the latest news, articles and features
Technology
Most people prefer AI-written stories 鈥� and can’t tell when they are made by humans
News
Mathematics
Why winner of biggest prize in maths has decided to work on AI instead
News
Technology
Will a new kind of AI that understands physical reality change the world again?
Features
Technology
Why full-fledged quantum computers might always be five years away
Comment
Popular articles
Trending 51动漫 articles