Printed Lasers Protect Against Dangerous Knockoff Goods
Cambridge researchers have developed crystal lasers that can be printed onto product labels in a bid to make them more resistant to fraud.
University of Cambridge researchers have developed a detection device that uses printed lasers to identify counterfeit goods. The detector could help make products more resistant to fraud.
Developed within the University’s Electrical Engineering Division by a team led by Dr. Damian Gardiner, the anti-fraud device could be used to identify fake pharmaceuticals, currency, and high-value goods.
It exploits a method for printing liquid crystal lasers with inkjet printers, giving the user a very precise level of control over the laser’s pattern and color combination. The detector then shines a second laser pulse onto the printed one, which reads the wavelength of the light emission through dedicated software and reproduces that reading as a pattern on a spectrograph.