Multiple phosphor layers with distinct emission properties allow smartphone cameras to verify document authenticity without expensive specialized equipment.
A verification device irradiates electroluminescent security features with ultraviolet light during electrical excitation to alter luminescence response.
An infrared reader scans personalized data fields to determine alphanumeric character counts for automated verification.
Parametric mapping transforms planar patterns onto curved surfaces, resolving the trade-off between shape complexity and manufacturing precision.