Version 2 testing QR on ceiling

A project log for IR/UV Invisible QR Code Navigation for Robotics

Anti-Stokes shift / Up Conversion invisible QR codes for indoor navigation of robotics. Invisible tags readable with UV or IR lighting.

Josh StarnesJosh Starnes 10/25/2018 at 02:250 Comments

Here is the QR code printed on paper in normal lighting of my home,  the ink is completely invisible until it is hit with the UV and IR lighting.

This is a normally lit room but the violet shows so bright through the camera that the brightness auto adjust darkens the surrounding area. The QR is certainly readable with this newer light source.