This study presents a visual sensing platform using geometric phase encoding of stimuli-responsive cholesteric liquid crystal polymers (CLCPs) for real-time visual pattern generation, eliminating the need for frequency change measurements. A humidity-responsive CLCP film encoded with a q-plate pattern demonstrates that humidity changes alter the shape of the vortex beam reflected from the CLCP. A prototype remote humidity monitoring platform is developed, leveraging the directionality and transmission properties of orbital angular momentum-carrying laser beams. This approach offers a novel sensing platform for CLCP-based sensors with promising practical applications.
