The use of scanning detection in optical noncontact position sensing is proposed, and a prototype is implemented, using optical scanning of pseudorandom binary sequences printed in bar-code format.

The optical properties show chiroptical resonances at ν = 100-400 THz (750-3000 nm), with CD values of ≤13%. The method offers a simple low-cost manufg. method of cm2-sized chiral plasmonic templates ...